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Tang L, O'Dwyer J, Kimyon Ö, Manefield MJ. Microbial community composition of food waste before anaerobic digestion. Sci Rep 2023; 13:12703. [PMID: 37543702 PMCID: PMC10404229 DOI: 10.1038/s41598-023-39991-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Accepted: 08/03/2023] [Indexed: 08/07/2023] Open
Abstract
Anaerobic digestion is widely used to process and recover value from food waste. Commercial food waste anaerobic digestion facilities seek improvements in process efficiency to enable higher throughput. There is limited information on the composition of microbial communities in food waste prior to digestion, limiting rational exploitation of the catalytic potential of microorganisms in pretreatment processes. To address this knowledge gap, bacterial and fungal communities in food waste samples from a commercial anaerobic digestion facility were characterised over 3 months. The abundance of 16S rRNA bacterial genes was approximately five orders of magnitude higher than the abundance of the fungal intergenic spacer (ITS) sequence, suggesting the numerical dominance of bacteria over fungi in food waste before anaerobic digestion. Evidence for the mass proliferation of bacteria in food waste during storage prior to anaerobic digestion is presented. The composition of the bacterial community shows variation over time, but lineages within the Lactobacillaceae family are consistently dominant. Nitrogen content and pH are correlated to community variation. These findings form a foundation for understanding the microbial ecology of food waste and provide opportunities to further improve the throughput of anaerobic digestion.
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Affiliation(s)
- Linjie Tang
- School of Civil and Environmental Engineering, UNSW Sydney, Sydney, NSW, 2052, Australia.
| | - Jack O'Dwyer
- School of Chemical Engineering, UNSW Sydney, Sydney, NSW, 2052, Australia
| | - Önder Kimyon
- School of Civil and Environmental Engineering, UNSW Sydney, Sydney, NSW, 2052, Australia
| | - Michael J Manefield
- School of Civil and Environmental Engineering, UNSW Sydney, Sydney, NSW, 2052, Australia
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2
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Huiliñir C, Pagés-Díaz J, Vargas G, Vega S, Lauzurique Y, Palominos N. Microaerobic condition as pretreatment for improving anaerobic digestion: A review. BIORESOURCE TECHNOLOGY 2023:129249. [PMID: 37268090 DOI: 10.1016/j.biortech.2023.129249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 05/24/2023] [Accepted: 05/26/2023] [Indexed: 06/04/2023]
Abstract
Pretreatment of waste before anaerobic digestion (AD) has been extensively studied during the last decades. One of the biological pretreatments studied is the microaeration. This review examines this process, including parameters and applications to different substrates at the lab, pilot and industrial scales, to guide further improvement in large-scale applications. The underlying mechanisms of accelerating hydrolysis and its effects on microbial diversity and enzymatic production were reviewed. In addition, modelling of the process and energetic and financial analysis is presented, showing that microaerobic pretreatment is commercially attractive under certain conditions. Finally, challenges and future perspectives were also highlighted to promote the development of microaeration as a pretreatment before AD.
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Affiliation(s)
- César Huiliñir
- Laboratorio de Biotecnología Ambiental, Departamento de Ingeniería Química y Bioprocesos, Universidad de Santiago de Chile, Av. Lib. Bdo. O Higgins 3363, Santiago de Chile, Chile.
| | - Jhosané Pagés-Díaz
- Laboratorio de Biotecnología Ambiental, Departamento de Ingeniería Química y Bioprocesos, Universidad de Santiago de Chile, Av. Lib. Bdo. O Higgins 3363, Santiago de Chile, Chile
| | - Gustavo Vargas
- Laboratorio de Biotecnología Ambiental, Departamento de Ingeniería Química y Bioprocesos, Universidad de Santiago de Chile, Av. Lib. Bdo. O Higgins 3363, Santiago de Chile, Chile
| | - Sylvana Vega
- Laboratorio de Biotecnología Ambiental, Departamento de Ingeniería Química y Bioprocesos, Universidad de Santiago de Chile, Av. Lib. Bdo. O Higgins 3363, Santiago de Chile, Chile
| | - Yeney Lauzurique
- Laboratorio de Biotecnología Ambiental, Departamento de Ingeniería Química y Bioprocesos, Universidad de Santiago de Chile, Av. Lib. Bdo. O Higgins 3363, Santiago de Chile, Chile
| | - Nicolás Palominos
- Laboratorio de Biotecnología Ambiental, Departamento de Ingeniería Química y Bioprocesos, Universidad de Santiago de Chile, Av. Lib. Bdo. O Higgins 3363, Santiago de Chile, Chile
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3
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Using Precision Agriculture (PA) Approach to Select Suitable Final Disposal Sites for Energy Generation. INFORMATION 2022. [DOI: 10.3390/info14010008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Severe environmental pollution and disease exposure are caused by poor waste management, specifically in urban areas due to urbanization. Additionally, energy shortage has threatened almost all parts of human life in the world. To overcome this problem, a precision agriculture approach using spatial mapping based on social environmental factors and sustainability principles can be used to find the variability of sites with respect to their suitability for waste disposal and energy generation. Therefore, this study aimed to develop a system for selecting suitable areas for municipal waste disposal and energy generation based on several structured criteria as hierarchical weighted factors. The system prototype was developed and tested in a case study conducted in an Indonesian Megapolitan area. The suitability map produced by the system for waste disposal and energy generation had an accuracy of 84.3%. Furthermore, validation was carried out by ground-checking at 102 location points. A future application of the proposed system is to provide spatial data-based analysis to improve regional planning and policy-making for waste disposal and energy generation in certain areas, particularly in Indonesia.
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4
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Abstract
Human activity and modern production contribute to the formation of a certain amount of waste that can be recycled to obtain useful products and energy sources. Today, the higher the level of industrial development, the greater the amount of waste generated, and as a result, the more important the need for disposal. A similar pattern is typical for any human production activity; as a result of large-scale production, at least 70–80% of waste is generated in relation to the amount of raw materials used. The large-scale use of polymeric materials and the plastic waste generated after their use lead to environmental pollution. While a small part of the waste is utilized naturally due to the vital activity of soil microorganisms, and a part is purposefully processed by humans into products for various purposes, a fairly large amount of waste occupies large areas in the form of a variety of garbage. After the removal of garbage by incineration, the liberated territories cannot be transferred to agricultural land due to the high content of harmful contaminants. The harm to the environment is quite obvious. In practice, certain types of waste consist of more than 70% content of valuable substances that can find further practical application in a wide variety of industries.
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Kazemi Shariat Panahi H, Dehhaghi M, Guillemin GJ, Gupta VK, Lam SS, Aghbashlo M, Tabatabaei M. A comprehensive review on anaerobic fungi applications in biofuels production. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 829:154521. [PMID: 35292323 DOI: 10.1016/j.scitotenv.2022.154521] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 03/07/2022] [Accepted: 03/08/2022] [Indexed: 06/14/2023]
Abstract
Anaerobic fungi (Neocallimastigomycota) are promising lignocellulose-degrading microorganisms that can be exploited by the biofuel industry. While natural production of ethanol by these microorganisms is very low, there is a greater potential for their use in the biogas industry. More specifically, anaerobic fungi can contribute to biogas production by either releasing holocellulose or reducing sugars from lignocelluloses that can be used as a substrate by bacteria and methanogens involved in the anaerobic digestion (AD) process or by metabolizing acetate and formate that can be directly consumed by methanogens. Despite their great potential, the appropriate tools for engineering anaerobic fungi have not been established yet. The first section of this review justifies how the biofuel industry can benefit from using anaerobic fungi and is followed by their taxonomy. In the third section, the possibility of using anaerobic fungi for the consolidated production of bioethanol is briefly discussed. Nevertheless, the main focus of this review is on the upstream and mainstream effects of bioaugmentation with anaerobic fungi on the AD process. The present review also scrutinizes the constraints on the way of efficient engineering of anaerobic rumen fungi. By providing this knowledge, this review aims to help research in this field with identifying the challenges that must be addressed by future experiments to achieve the full potentials of these promising microorganisms. To sum up, the pretreatment of lignocelluloses by anaerobic fungi can prevent carbohydrate loss due to respiration (compared to white-rot fungi). Following fungal mixed acid fermentation, the obtained slurry containing sugars and more susceptible holocellulose can be directly consumed by AD microorganisms (bacteria, methanogens). The bioaugmentation of anaerobic fungi into the AD process can increase methane biosynthesis by >3.3 times. Despite this, for the commercial AD process, novel genetic engineering techniques and kits must be developed to efficiently improve anaerobic fungi viability throughout the AD process.
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Affiliation(s)
- Hamed Kazemi Shariat Panahi
- Henan Province Engineering Research Center for Forest Biomass Value-added Products, School of Forestry, Henan Agricultural University, Zhengzhou 450002, China; Centre for Motor Neuron Disease Research, Macquarie Medical School, Faculty of Medicine, Health and Human Sciences, Macquarie University, NSW, Australia; Biofuel Research Team (BRTeam), Terengganu, Malaysia
| | - Mona Dehhaghi
- Centre for Motor Neuron Disease Research, Macquarie Medical School, Faculty of Medicine, Health and Human Sciences, Macquarie University, NSW, Australia; Biofuel Research Team (BRTeam), Terengganu, Malaysia; PANDIS.org, Australia
| | - Gilles J Guillemin
- Centre for Motor Neuron Disease Research, Macquarie Medical School, Faculty of Medicine, Health and Human Sciences, Macquarie University, NSW, Australia; PANDIS.org, Australia
| | - Vijai Kumar Gupta
- Biorefining and Advanced Materials Research Center, SRUC, Kings Buildings, West Mains Road, Edinburgh EH9 3JG, UK; Centre for Safe and Improved Food, SRUC, Kings Buildings, West Mains Road, Edinburgh EH9 3JG, UK
| | - Su Shiung Lam
- Higher Institution Centre of Excellence (HICoE), Institute of Tropical Aquaculture and Fisheries (AKUATROP), Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia; Henan Province Engineering Research Center for Forest Biomass Value-added Products, School of Forestry, Henan Agricultural University, Zhengzhou 450002, China.
| | - Mortaza Aghbashlo
- Department of Mechanical Engineering of Agricultural Machinery, Faculty of Agricultural Engineering and Technology, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran; Henan Province Engineering Research Center for Forest Biomass Value-added Products, School of Forestry, Henan Agricultural University, Zhengzhou 450002, China.
| | - Meisam Tabatabaei
- Higher Institution Centre of Excellence (HICoE), Institute of Tropical Aquaculture and Fisheries (AKUATROP), Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia; Henan Province Engineering Research Center for Forest Biomass Value-added Products, School of Forestry, Henan Agricultural University, Zhengzhou 450002, China; Biofuel Research Team (BRTeam), Terengganu, Malaysia.
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6
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The Measurement, Application and Effect of Oxygen in Microbial Fermentations: Focusing on Methane and Carboxylate Production. FERMENTATION-BASEL 2022. [DOI: 10.3390/fermentation8040138] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Oxygen is considered detrimental to anaerobic fermentation processes by many practitioners. However, deliberate oxygen sparging has been used successfully for decades to remove H2S in anaerobic digestion (AD) systems. Moreover, microaeration techniques during AD have shown that small doses of oxygen may enhance process performance and promote the in situ degradation of recalcitrant compounds. However, existing oxygen dosing techniques are imprecise, which has led to inconsistent results between studies. At the same time, real-time oxygen fluxes cannot be reliably quantified due to the complexity of most bioreactor systems. Thus, there is a pressing need for robust monitoring and process control in applications where oxygen serves as an operating parameter or an experimental variable. This review summarizes and evaluates the available methodologies for oxygen measurement and dosing as they pertain to anaerobic microbiomes. The historical use of (micro-)aeration in anaerobic digestion and its potential role in other anaerobic fermentation processes are critiqued in detail. This critique also provides insights into the effects of oxygen on these microbiomes. Our assessment suggests that oxygen dosing, when implemented in a controlled and quantifiable manner, could serve as an effective tool for bioprocess engineers to further manipulate anaerobic microbiomes for either bioenergy or biochemical production.
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7
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Rabii A, Koupaie EH, Aldin S, Dahman Y, Elbeshbishy E. Methods of pretreatment and their impacts on anaerobic codigestion of multifeedstocks: A review. WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2021; 93:2834-2852. [PMID: 34459508 DOI: 10.1002/wer.1636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Revised: 06/29/2021] [Accepted: 07/07/2021] [Indexed: 06/13/2023]
Abstract
Anaerobic codigestion (AnCoD) has attracted attention owing to its advantages over conventional anaerobic digestion, and attempts are still going on to develop methods for improving the efficiency of this technology. Mostly, addition of cosubstrates without applying a proper pretreatment cannot adequately enhance the performance of the digestion. However, there is a lack of a comprehensive study on different pretreatment methods specific to the wide range of cosubstrates. This review aimed to (i) categorize pretreatment techniques that have been developed for improving AnCoD, (ii) present the results of the studies on the effect of pretreatment on improving AnCoD, and (iii) provide a comparison between pretreatment methods and their application for different types of cosubstrates. The findings primarily validated the influence of pretreatment to enhance the process by increasing biodegradability, improved hydrolysis, reduced hydraulic retention time (HRT), and improved methane production. The five main categories of pretreatment employed in codigestion included the following: mechanical, thermal, chemical, biological, and hybrid pretreatment. Among them, mechanical and biological pretreatment have the most and least application in codigestion, respectively. Greater efforts are required on the application of biological pretreatment and cost-benefit analysis of different pretreatment options on the variety of the cosubstrates. PRACTITIONER POINTS: Pretreatment can significantly enhance biomethane production in anaerobic digestion Anaerobic codigestion along with pretreatment can further enhance the conventional anaerobic digestion of single feedstock Mechanical and biological methods have been the most and least practiced pretreatment options Selection of applicable pretreatment option to enhance methane production is subject to the type of cosubstrates in the system There is a research gap in evaluating the application of biological pretreatment for various types of cosubstrates.
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Affiliation(s)
- Anahita Rabii
- Environmental Research for Resource Recovery (ER3), Department of Civil Engineering, Ryerson University, Toronto, Ontario, Canada
| | - Ehssan Hosseini Koupaie
- Environmental Research for Resource Recovery (ER3), Department of Civil Engineering, Ryerson University, Toronto, Ontario, Canada
| | - Saad Aldin
- Environmental Research for Resource Recovery (ER3), Department of Civil Engineering, Ryerson University, Toronto, Ontario, Canada
| | - Yaser Dahman
- Department of Chemical Engineering, Ryerson University, Toronto, Ontario, Canada
| | - Elsayed Elbeshbishy
- Environmental Research for Resource Recovery (ER3), Department of Civil Engineering, Ryerson University, Toronto, Ontario, Canada
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8
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Zhuang H, Lee PH, Wu Z, Jing H, Guan J, Tang X, Tan GYA, Leu SY. Genomic driven factors enhance biocatalyst-related cellulolysis potential in anaerobic digestion. BIORESOURCE TECHNOLOGY 2021; 333:125148. [PMID: 33878497 DOI: 10.1016/j.biortech.2021.125148] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 04/01/2021] [Accepted: 04/04/2021] [Indexed: 06/12/2023]
Abstract
Anaerobic digestion (AD) is a promising technology to recover bioenergy from biodegradable biomass, including cellulosic wastes. Through a few fractionation/separation techniques, cellulose has demonstrated its potential in AD, but the performance of the process is rather substrate-specific, as cellulolysis bacteria are sensitive to the enzyme-substrate interactions. Cellulosome is a self-assembled enzyme complex with many functionalized modules in the bacteria which has been gradually studied, however the genomic fingerprints of the culture-specific cellulosome in AD are relatively unclear especially under processing conditions. To clarify the key factors affecting the cellulosome induced cellulolysis, this review summarized the most recent publications of AD regarding the fates of cellulose, sources and functional genes of cellulosome, and omics methods for functional analyses. Different processes for organic treatment including applying food grinds in sewer, biomass valorization, cellulose fractionation, microaeration, and enzymatic hydrolysis enhanced fermentation, were highlighted to support the sustainable development of AD technology.
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Affiliation(s)
- Huichuan Zhuang
- Dept. of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong; Department of Civil Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong
| | - Po-Heng Lee
- Dept. of Civil and Environmental Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, UK
| | - Zhuoying Wu
- Dept. of Civil and Environmental Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, UK
| | - Houde Jing
- Dept. of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Jianyu Guan
- Dept. of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Xiaojing Tang
- Dept. of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Giin-Yu Amy Tan
- Department of Civil Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong
| | - Shao-Yuan Leu
- Dept. of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong.
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9
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Zhen F, Luo X, Xing T, Sun Y, Kong X, Li W. Performance evaluation and microbial community analysis of microaerobic pretreatment on thermophilic dry anaerobic digestion. Biochem Eng J 2021. [DOI: 10.1016/j.bej.2020.107873] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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10
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Wu Z, Nguyen D, Lam TYC, Zhuang H, Shrestha S, Raskin L, Khanal SK, Lee PH. Synergistic association between cytochrome bd-encoded Proteiniphilum and reactive oxygen species (ROS)-scavenging methanogens in microaerobic-anaerobic digestion of lignocellulosic biomass. WATER RESEARCH 2021; 190:116721. [PMID: 33326896 DOI: 10.1016/j.watres.2020.116721] [Citation(s) in RCA: 62] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 11/30/2020] [Accepted: 12/01/2020] [Indexed: 06/12/2023]
Abstract
Intermittent (every other day) microaerobic [picomolar oxygen by oxidation-reduction potential (ORP) set at +25 mV above anaerobic baseline] digestion of lignocellulosic biomass showed higher digestibility and better stability at a high organic loading rate (OLR) of 5 g volatile solids (VS)/L/d than that under strict anaerobic conditions. However, the microbial mechanisms supporting the delicate balance under microaeration remain underexplored. On the basis of our previous findings that microbial communities in replicate experiments were dominated by strains of the genus Proteiniphilum but contained diverse taxa of methanogenic archaea, here we recovered related genomes and reconstructed the putative metabolic pathways using a genome-centric metagenomic approach. The highly enriched Proteiniphilum strains were identified as efficient cellulolytic facultative bacterium, which directly degraded lignocellulose to carbon dioxide, formate, and acetate via aerobic respiration and anaerobic fermentation, alternatively. Moreover, high oxygen affinity cytochromes, bd-type terminal oxidases, in Proteiniphilum strains were found to be closely associated with such picomolar oxygen conditions, which has long been overlooked in anaerobic digestion. Furthermore, hydrogenotrophic methanogenesis was the prevalent pathway for methane production while Methanosarcina, Methanobrevibacter, and Methanocorpusculum were the dominant methanogens in the replicate experiments. Importantly, the two functional groups, namely cellulolytic facultative Proteiniphilum strains and methanogens, encoded various antioxidant enzymes. Energy-dependent reactive oxygen species (ROS) scavengers (superoxide reductase (SOR) and rubrerythrin (rbr) were ubiquitously present in different methanogenic taxa in response to replicate-specific ORP levels (-470, -450 and -475 mV). Collectively, cytochrome bd oxidase and ROS defenders may play roles in improving the digestibility and stability observed in intermittent microaerobic digestion.
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Affiliation(s)
- Zhuoying Wu
- Department of Civil and Environmental Engineering, Imperial College, London, The United Kingdom
| | - Duc Nguyen
- Department of Molecular Biosciences and Bioengineering, University of Hawai'i at Mānoa, Honolulu, HI 96822, USA
| | - Theo Y C Lam
- Department of Civil and Environmental Engineering, Imperial College, London, The United Kingdom; Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR
| | - Huichuan Zhuang
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR
| | - Shilva Shrestha
- Department of Civil and Environmental Engineering, University of Michigan, 1351 Beal Avenue, 107 EWRE Building, Ann Arbor, MI 48109-2125, USA
| | - Lutgarde Raskin
- Department of Civil and Environmental Engineering, University of Michigan, 1351 Beal Avenue, 107 EWRE Building, Ann Arbor, MI 48109-2125, USA
| | - Samir Kumar Khanal
- Department of Molecular Biosciences and Bioengineering, University of Hawai'i at Mānoa, Honolulu, HI 96822, USA.
| | - Po-Heng Lee
- Department of Civil and Environmental Engineering, Imperial College, London, The United Kingdom.
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11
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Li Z, Zhang J, Kong C, Li W, Wang J, Zang L. Methane production from wheat straw pretreated with CaO 2/cellulase. RSC Adv 2021; 11:20541-20549. [PMID: 35479902 PMCID: PMC9033952 DOI: 10.1039/d1ra02437j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2021] [Accepted: 05/25/2021] [Indexed: 11/24/2022] Open
Abstract
There are various lignocellulosic biomass pretreatments that act as attractive strategies to improve anaerobic digestion for methane (CH4) generation. This study proposes an effective technique to obtain more CH4via the hydrothermal coupled calcium peroxide (CaO2) co-cellulase pretreatment of lignocellulosic biomass. The total organic carbon in the hydrolysate of samples treated with 6% CaO2 and 15 mg enzyme per g-cellulose was 7330 mg L−1, which represented an increase of 92.39% over the total organic carbon value of samples hydrolyzed with the enzyme alone. The promotion of the anaerobic digestion of wheat straw followed this order: hydrothermal coupled CaO2 co-cellulase pretreatment > hydrothermal coupled CaO2 pretreatment > enzymatic pretreatment alone > control group. The sample treated with 6% CaO2 and 15 mg enzyme per g-cellulose gave the highest CH4 production with a CH4 yield of 214 mL g−1 total solids, which represented an increase of 64.81% compared to the control group. The CH4 yield decreased slightly when the amount of added cellulase exceeded 15 mg enzyme per g-cellulose. This work reports methane production from wheat straw pretreated with CaO2/cellulase.![]()
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Affiliation(s)
- Zhenmin Li
- College of Environmental Science and Engineering
- Qilu University of Technology (Shandong Academy of Science)
- Jinan 250353
- China
| | - Jishi Zhang
- College of Environmental Science and Engineering
- Qilu University of Technology (Shandong Academy of Science)
- Jinan 250353
- China
| | - Chunduo Kong
- College of Environmental Science and Engineering
- Qilu University of Technology (Shandong Academy of Science)
- Jinan 250353
- China
| | - Wenqing Li
- College of Environmental Science and Engineering
- Qilu University of Technology (Shandong Academy of Science)
- Jinan 250353
- China
| | - Jinwei Wang
- Weifang Ensign Industry Co., Ltd
- Weifang 250353
- China
| | - Lihua Zang
- College of Environmental Science and Engineering
- Qilu University of Technology (Shandong Academy of Science)
- Jinan 250353
- China
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12
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Gao L, Wu X, Xia X, Jin Z. Fine-tuning ethanol oxidation pathway enzymes and cofactor PQQ coordinates the conflict between fitness and acetic acid production by Acetobacter pasteurianus. Microb Biotechnol 2020; 14:643-655. [PMID: 33174682 PMCID: PMC7936290 DOI: 10.1111/1751-7915.13703] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2020] [Revised: 09/23/2020] [Accepted: 10/22/2020] [Indexed: 12/28/2022] Open
Abstract
The very high concentrations required for industrial production of free acetic acid create toxicity and low pH values, which usually conflict with the host cell growth, leading to a poor productivity. Achieving a balance between cell fitness and product synthesis is the key challenge to improving acetic acid production efficiency in metabolic engineering. Here, we show that the synergistic regulation of alcohol/aldehyde dehydrogenase expression and cofactor PQQ level could not only efficiently relieve conflict between increased acetic acid production and compromised cell fitness, but also greatly enhance acetic acid tolerance of Acetobacter pasteurianus to a high initial concentration (3% v/v) of acetic acid. Combinatorial expression of adhA and pqqABCDE greatly shortens the duration of starting‐up process from 116 to 99 h, leading to a yield of 69 g l‐1 acetic acid in semi‐continuous fermentation. As a final result, average acetic acid productivity has been raised to 0.99 g l‐1 h‐1, which was 32% higher than the parental A. pasteurianus. This study is of great significance for decreasing cost of semi‐continuous fermentation for producing high‐strength acetic acid industrially. We envisioned that this strategy will be useful for production of many other desired organic acids, especially those involving cofactor reactions.
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Affiliation(s)
- Ling Gao
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, China.,State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China
| | - Xiaodan Wu
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Xiaole Xia
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, China.,The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Zhengyu Jin
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, China
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13
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Gonzalez-Salgado I, Cavaillé L, Dubos S, Mengelle E, Kim C, Bounouba M, Paul E, Pommier S, Bessiere Y. Combining thermophilic aerobic reactor (TAR) with mesophilic anaerobic digestion (MAD) improves the degradation of pharmaceutical compounds. WATER RESEARCH 2020; 182:116033. [PMID: 32721702 DOI: 10.1016/j.watres.2020.116033] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Revised: 06/02/2020] [Accepted: 06/08/2020] [Indexed: 06/11/2023]
Abstract
The removal efficiency of nine pharmaceutical compounds from primary sludge was evaluated in two different operating conditions: (i) in conventional Mesophilic Anaerobic Digestion (MAD) alone and (ii) in a co-treatment process combining Mesophilic Anaerobic Digestion and a Thermophilic Aerobic Reactor (MAD-TAR). The pilot scale reactors were fed with primary sludge obtained after decantation of urban wastewater. Concerning the biodegradation of organic matter, thermophilic aeration increased solubilization and hydrolysis yields of digestion, resulting in a further 26% supplementary removal of chemical oxygen demand (COD) in MAD-TAR process compared to the conventional mesophilic anaerobic digestion. The highest removal rate of target micropollutants were observed for caffeine (CAF) and sulfamethoxazole (SMX) (>89%) with no substantial differences between both processes. Furthermore, MAD-TAR process showed a significant increase of removal efficiency for oxazepam (OXA) (73%), propranolol (PRO) (61%) and ofloxacine (OFL) (41%) and a slight increase for diclofenac (DIC) (4%) and 2 hydroxy-ibuprofen (2OH-IBP) (5%). However, ibuprofen (IBP) and carbamazepine (CBZ) were not degraded during both processes. Anaerobic digestion affected the liquid-solid partition of most target compounds. Sorbed fraction of pharmaceutical compounds on the sludge tend to decrease after digestion, this tendency being more pronounced in the case of the MAD-TAR process due to much lower concentration of solids.
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Affiliation(s)
| | - L Cavaillé
- Univ Toulouse, INPT, UPS, Lab Genie Chim, 4 Allee Emile Monso, F-31432, Toulouse, France.
| | - S Dubos
- TBI, Université de Toulouse, CNRS, INRAE, INSA, Toulouse, France
| | - E Mengelle
- TBI, Université de Toulouse, CNRS, INRAE, INSA, Toulouse, France
| | - C Kim
- TBI, Université de Toulouse, CNRS, INRAE, INSA, Toulouse, France
| | - M Bounouba
- TBI, Université de Toulouse, CNRS, INRAE, INSA, Toulouse, France
| | - E Paul
- TBI, Université de Toulouse, CNRS, INRAE, INSA, Toulouse, France
| | - S Pommier
- TBI, Université de Toulouse, CNRS, INRAE, INSA, Toulouse, France
| | - Y Bessiere
- TBI, Université de Toulouse, CNRS, INRAE, INSA, Toulouse, France.
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14
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Two Phase Anaerobic Digestion System of Municipal Solid Waste by Utilizing Microaeration and Granular Activated Carbon. ENERGIES 2020. [DOI: 10.3390/en13040933] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
In an anaerobic digestion (AD) process, the hydrolysis phase is often limited when substrates with high concentrations of solids are used. We hypothesized that applying micro-aeration in the hydrolysis phase and the application of granular activated carbon (GAC) in the methanogenesis phase could make the AD process more efficient. A packed bed reactor (PBR) coupled with an up-flow anaerobic sludge blanket (UASB) was conducted, and its effects on methane generation were evaluated. The micro-aeration rate applied in PBR was 254 L-air/kg-Total solids (TS)-d was compared with a control reactor. Micro-aeration showed that it reduced the hydrolysis time and increased the organic matter solubilization as chemical oxygen demand (COD) increasing 200%, with a volatile fatty acids (VFAs) increment higher than 300%, compared to the control reactor (without aeration). Our findings revealed that the implementations of microaeration and GAC in the two-phase AD system could enhance methane production by reducing hydrolysis time, increasing solid waste solubilization.
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15
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Saqib NU, Sharma HB, Baroutian S, Dubey B, Sarmah AK. Valorisation of food waste via hydrothermal carbonisation and techno-economic feasibility assessment. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 690:261-276. [PMID: 31288117 DOI: 10.1016/j.scitotenv.2019.06.484] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Revised: 06/27/2019] [Accepted: 06/27/2019] [Indexed: 06/09/2023]
Abstract
Food waste constitutes a remarkable portion of municipal solid waste. About one-third of the global food waste produced is lost with the food supply chain. Food waste in many countries is still dumped of in landfill or incinerated simultaneously with other municipal wastes. Food waste requires proper management and recycling techniques in order to minimise its environmental burden and risk to human life. Despite considerable research on food waste conversion still, there is a shortage of comprehensive reviews of the published literature. In this review, we provide a mini global perspective of food waste with special emphasis on New Zealand and their conversion into the useful material through hydrothermal carbonisation (HTC). Other thermal technologies such as incineration and pyrolysis are also briefly discussed. The review discusses why HTC is more suitable thermal technology than others, which are currently available. Recognising the importance of techno-economic feasibility of HTC, we present a cost analysis on the production of value-added products via HTC with examples taken from the literature to gather information in the feasibility assessment process. Finally, key challenges and future directions for a better productive way of handling food waste are being suggested.
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Affiliation(s)
- Najam Ul Saqib
- Department of Civil & Environmental Engineering, Faulty of Engineering, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | - Hari Bhakta Sharma
- Department of Civil Engineering, Indian Institute of Technology - Kharagpur, Kharagpur, West Bengal 721302, India
| | - Saeid Baroutian
- Department of Chemical & Materials Engineering, Faculty of Engineering, The University of Auckland, 1010, New Zealand
| | - Brajesh Dubey
- Department of Civil Engineering, Indian Institute of Technology - Kharagpur, Kharagpur, West Bengal 721302, India
| | - Ajit K Sarmah
- Department of Civil & Environmental Engineering, Faulty of Engineering, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand.
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16
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Ruan D, Zhou Z, Pang H, Yao J, Chen G, Qiu Z. Enhancing methane production of anaerobic sludge digestion by microaeration: Enzyme activity stimulation, semi-continuous reactor validation and microbial community analysis. BIORESOURCE TECHNOLOGY 2019; 289:121643. [PMID: 31228743 DOI: 10.1016/j.biortech.2019.121643] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Revised: 06/05/2019] [Accepted: 06/10/2019] [Indexed: 06/09/2023]
Abstract
Effects of microaeration pretreatment on sludge hydrolysis, biogas production and microbial community structure in anaerobic digestion (AD) were investigated by bench-scale tests and semi-continuous experiments. Bench tests showed that microaeration led to the release of dissolved organic matters, generation of volatile fatty acids and stimulation of enzyme activity. Correlation analysis showed that methane production was significantly correlated with the activity of α-glucosidase at 0.01 level, and with protease activity, released polysaccharides and VFAs at 0.05 level. Semi-continuous experiments showed that microaeration accelerated the utilization of organic matters, increased biogas production by 16.4%, enhanced methane content in biogas, and improved sludge dewaterability. Microbial community structure analysis showed that microaeration promoted enrichment of hydrolytic and fermentative bacteria in AD reactor rather than methanogenic bacteria, and aceticlastic methanogenesis was the main methanogenic pathway for methane production.
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Affiliation(s)
- Danian Ruan
- Shanghai Engineering Research Center of Energy - Saving in Heat Exchange Systems, College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai 200090, China
| | - Zhen Zhou
- Shanghai Engineering Research Center of Energy - Saving in Heat Exchange Systems, College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai 200090, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China.
| | - Hongjian Pang
- Shanghai Engineering Research Center of Energy - Saving in Heat Exchange Systems, College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai 200090, China
| | - Jie Yao
- Shanghai Chengtou Wastewater Treatment Co., Ltd, Shanghai 201203, China
| | - Guang Chen
- Shanghai Chengtou Wastewater Treatment Co., Ltd, Shanghai 201203, China
| | - Zhan Qiu
- Shanghai Chengtou Wastewater Treatment Co., Ltd, Shanghai 201203, China
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17
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Abstract
A large volume of food is being wasted every year, while the pulp and paper industry also generate a large amount of solid wastes on a daily basis, causing environmental challenges around the world. Dry anaerobic digestion (AD) of these solid wastes is a cost-effective method for proper management. However, dry digestion of these waste streams has been restricted due to their complex structure, the presence of possible inhibitors and inappropriate operating conditions. In light of this fact, dry digestion of food waste (FW) and paper wastes (PW) was conducted at different total solid (TS) concentrations of reactor mixtures of 14%, 16%, 18% and 20% TS, corresponding to substrate to inoculum (S/I) ratio of 0.5 and 1; investigating the optimum operating conditions for effective dry digestion of these complex wastes. The highest methane yields of 402 NmlCH4/gVS and 229 NmlCH4/gVS were obtained from digestion of FW and PW, respectively at 14%TS corresponding to an S/I ratio of 0.5. Increasing the S/I ratio from 0.5 to 1 and thereby having a TS content of 20% in the reactor mixtures was unfavorable to the digestion of both substrates.
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18
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Song G, Yu Y, Liu T, Xi H, Zhou Y. Performance of microaeration hydrolytic acidification process in the pretreatment of 2-butenal manufacture wastewater. JOURNAL OF HAZARDOUS MATERIALS 2019; 369:465-473. [PMID: 30797115 DOI: 10.1016/j.jhazmat.2019.02.034] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 01/27/2019] [Accepted: 02/09/2019] [Indexed: 06/09/2023]
Abstract
The performance of the microaeration hydrolytic acidification (MAHA) process and microbial community were investigated under different organic loading rates (OLRs) for the pretreatment of 2-butenal manufacture wastewater (2-BMW). Results indicated that OLRs had different impact on the performance of MAHA process. More than 23.7 ± 2.3% of the chemical oxygen demand (COD) removal and the highest acidification degree (20.9 ± 3.1%) were obtained when OLRs were less than 4.0 ± 0.1 kgCOD/m3 d. However, further increasing OLRs to 6.1 ± 0.1 kgCOD/m3 d subsequently led to the significant reductions of COD removal and acidification degree. In addition, it could be preliminarily inferred that 2H-pyran-2-one tetrahydro-4-(2-methyl-1-propen-3-yl), 5-formyl-6-methyl-4,5-dihydropyran and ethyl sorbate were the main refractory and toxic organics for microorganisms in the wastewater. The soluble microbial product (SMP) and extracellular polymeric substance (EPS) contents (protein, polysaccharide, nucleic acid) had obvious changes under different OLRs. With parallel factor (PARAFAC) model, four fluorescent components were identified. The Fmax of protein-like substances in SMP significantly decreased with increasing OLRs to 6.1 ± 0.1 kgCOD/m3 d, which might attribute to fluorescence quenching. Illumina MiSeq sequencing revealed that Pseudomonas, Longilinea, T78, Clostridium, WCHB1-05, Acinetobacter, SHD-231 and Oscillospira were dominant genera at different OLRs.
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Affiliation(s)
- Guangqing Song
- Research Center of Water Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing, 100012, PR China; College of Water Sciences, Beijing Normal University, Beijing, 100875, PR China; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environment Sciences, Beijing, 100012, PR China
| | - Yin Yu
- Research Center of Water Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing, 100012, PR China; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environment Sciences, Beijing, 100012, PR China
| | - Tao Liu
- School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou, 730070, China
| | - Hongbo Xi
- Research Center of Water Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing, 100012, PR China; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environment Sciences, Beijing, 100012, PR China.
| | - Yuexi Zhou
- Research Center of Water Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing, 100012, PR China; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environment Sciences, Beijing, 100012, PR China.
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19
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Siddique A, Suraraksa B, Horprathum M, Oaew S, Cheunkar S. Wastewater biofilm formation on self-assembled monolayer surfaces using elastomeric flow cells. Anaerobe 2019; 57:11-18. [PMID: 30872074 DOI: 10.1016/j.anaerobe.2019.03.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Revised: 02/25/2019] [Accepted: 03/05/2019] [Indexed: 01/18/2023]
Abstract
In anaerobic wastewater treatment, microbial biofilm is beneficial for efficient substrate utilization and for preventing the wash-out of key microorganisms. By providing solid supports, biofilm formation can be accelerated due to the early initial adhesion of residing microbes. Alteration in surface properties is therefore one such approach that helps us understand microbial interfacial interaction. Here, self-assembled monolayers of alkanethiols with carboxyl (-COOH), hydroxyl (-OH), and amine (-NH2) terminal moieties on gold (Au) substrates were employed to study the initial adhesion of wastewater microbes. An elastomeric flow cell was also utilized to simulate the environment of wastewater bioreactor. Results from fluorescence in situ hybridization (FISH) portrayed more enhanced microbial adhesion after 2 h on -NH2 functional group with the calculated surface coverage of 12.8 ± 2.4% as compared to 7.7 ± 1.6% on -COOH, 11.0 ± 2.0% on -OH, and 1.2% on unmodified Au surfaces. This might be because of concomitant electrostatic attraction between negatively-charged bacteria and positively-charged (-NH3+) functional groups. Nevertheless, the average surface coverage by individual biofilm clusters was 28.0 ± 5.0 μm2 and 32.0 ± 9.0 μm2 on -NH2 and -OH surfaces, respectively, while -COOH surfaces resulted in higher value (60.0 ± 5.0 μm2) and no significant cluster formation was observed on Au surfaces. Accordingly, the average inter-cluster distance observed on -NH2 surfaces was relatively smaller (3.0 ± 0.6 μm) as compared to that on other surfaces. Overall, these data suggest favorable initial biofilm growth on more hydrophilic and positively-charged surfaces. Furthermore, the analysis of the mean fluorescence intensity revealed preferred initial adhesion of key microbes (archaea) on -OH and -NH2 surfaces. Indeed, results obtained from this study would be beneficial in designing selective biointerfaces for certain biofilm carriers in a typical wastewater bioreactor. Importantly, our elastomeric flow cell integrated with SAM-modified surfaces demonstrated an ideal platform for high-throughput investigation of wastewater biofilm under controlled environments.
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Affiliation(s)
- Arslan Siddique
- Biotechnology Division, School of Bioresources and Technology, King Mongkut's University of Technology Thonburi, Bang Khun Thian, Bangkok, 10150, Thailand
| | - Benjaphon Suraraksa
- Excellent Center for Waste Utilization and Management, National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency, King Mongkut's University of Technology Thonburi, Bang Khun Thian, Bangkok, 10150, Thailand
| | - Mati Horprathum
- Optical Thin-Film Laboratory, National Electronics and Computer Technology Center, National Science and Technology Development Agency, Pathumthani, 12120, Thailand
| | - Sukunya Oaew
- Biochemical Engineering and Pilot Plant Research and Development Laboratory, National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency, King Mongkut's University of Technology Thonburi, Bang Khun Thian, Bangkok, 10150, Thailand
| | - Sarawut Cheunkar
- Biotechnology Division, School of Bioresources and Technology, King Mongkut's University of Technology Thonburi, Bang Khun Thian, Bangkok, 10150, Thailand.
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20
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Ghyselbrecht K, Monballiu A, Somers MH, Sigurnjak I, Meers E, Appels L, Meesschaert B. The fate of nitrite and nitrate during anaerobic digestion. ENVIRONMENTAL TECHNOLOGY 2019; 40:1013-1026. [PMID: 29219761 DOI: 10.1080/09593330.2017.1415380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Accepted: 12/05/2017] [Indexed: 06/07/2023]
Abstract
Anaerobic digestion is widely used to produce renewable energy. However, the main drawback is the limited conversion efficiency of organic matter. Applying an advanced oxidation process as a digestate post-treatment is able to increase this conversion efficiency but will also lead to the oxidation of ammonium to nitrite or nitrate. In this lab-scale study, the fate of the latter in the digester was investigated. Nitrite and nitrate were therefore added in concentrations that could arise from rate-limiting ammonium concentrations (1.25-5 g L-1 N). The study clearly demonstrated that nitrite and nitrate were denitrified during the subsequent digestion process resulting in the formation of nitrogen gas. After a concentration-dependent adaptation period, in which some biogas was produced, the added nitrite was denitrified in amounts proportional to the amounts of electron donor present. This denitrification, however, strongly reduces the possibility that Anammox bacteria can develop. Nitrate was also denitrified in amounts proportional to the amounts of electron donor, but biogas production was not completely blocked in this case. Moreover, high concentrations of nitrite and nitrate inhibited their own denitrification. The methane formed was used as electron donor for the further denitrification of nitrate and nitrite when no other readily available electron donor was present. After addition of either nitrite or nitrate and their denitrification, the biogas production did not recover properly.
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Affiliation(s)
- K Ghyselbrecht
- a Cluster for Bio-engineering Technology, Department of Microbial and Molecular Systems , KU Leuven, Campus Bruges , Brugge , Belgium
| | - A Monballiu
- a Cluster for Bio-engineering Technology, Department of Microbial and Molecular Systems , KU Leuven, Campus Bruges , Brugge , Belgium
| | - M H Somers
- b Cluster for Sustainable Process Technology, Department of Chemical Engineering , KU Leuven, Technology Campus De Nayer , Sint-Katelijne Waver , Belgium
| | - I Sigurnjak
- c Laboratory of Analytical Chemistry and Applied Ecochemistry, Department of Applied Analytical and Physical Chemistry , Ghent University , Gent , Belgium
| | - E Meers
- c Laboratory of Analytical Chemistry and Applied Ecochemistry, Department of Applied Analytical and Physical Chemistry , Ghent University , Gent , Belgium
| | - L Appels
- b Cluster for Sustainable Process Technology, Department of Chemical Engineering , KU Leuven, Technology Campus De Nayer , Sint-Katelijne Waver , Belgium
| | - B Meesschaert
- a Cluster for Bio-engineering Technology, Department of Microbial and Molecular Systems , KU Leuven, Campus Bruges , Brugge , Belgium
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21
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Zhou H, Wen Z. Solid-State Anaerobic Digestion for Waste Management and Biogas Production. ADVANCES IN BIOCHEMICAL ENGINEERING/BIOTECHNOLOGY 2019; 169:147-168. [PMID: 30796502 DOI: 10.1007/10_2019_86] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Solid-state anaerobic digestion (SS-AD) is commonly used to treat feedstocks with high solid content such as municipal solid waste and lignocellulosic biomass. Compared to liquid state anaerobic digestion (LS-AD), SS-AD has multiple advantages including high organic loading, minimal digestate generated, and low energy requirement for heating. However, the main disadvantages limiting the efficiency of SS-AD are long solid retention time, incomplete mixing, and an accumulation of inhibitors. For a successful and efficient SS-AD, it is important to control operation parameters such as nutrient levels, C/N ratio, feedstock-to-inoculum ratio, pH, temperature, and mixing. Biogas production in SS-AD performance can be enhanced by feedstock pretreatment, co-digestion, and supplement of additives such as biochar. The aim of this chapter is to provide a comprehensive summary of the current development in SS-AD as an effective way for treating solid waste materials. Graphical Abstract.
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Affiliation(s)
- Haoqin Zhou
- Department of Food Science and Human Nutrition, Iowa State University, Ames, IA, USA
| | - Zhiyou Wen
- Department of Food Science and Human Nutrition, Iowa State University, Ames, IA, USA.
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22
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Fisgativa H, Tremier A, Saoudi M, Le Roux S, Dabert P. Biochemical and microbial changes reveal how aerobic pre-treatment impacts anaerobic biodegradability of food waste. WASTE MANAGEMENT (NEW YORK, N.Y.) 2018; 80:119-129. [PMID: 30454991 DOI: 10.1016/j.wasman.2018.09.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Revised: 09/04/2018] [Accepted: 09/04/2018] [Indexed: 06/09/2023]
Abstract
Aerobic pre-treatment of food waste (FW) was performed at different oxygen concentrations (0%, 5%, 10% and 21%O2) and different durations (1, 2, 3 and 4 days) to investigate its impact on biochemical and microbial community characteristics of the waste and its ability to improve anaerobic biodegradability. Whatever the duration, the highest effect of pre-treatment was observed at full aerobic pre-treatment (21%O2) while 5%O2 and 10%O2 showed lower transformation performances. Biochemical variations at 21%O2 were mainly a decrease of simple carbohydrates, volatile fatty acids (VFA) and low molecular weight water soluble compounds and an increase of high weight water soluble compounds. Microbial community analysis showed a clear modification of populations after 21%O2 aerobic pre-treatment, changing from an initial dominance of lactic acid bacteria to a final dominance of VFA consumers (like Acetobacter) and a higher presence of Fungi. Enzymatic tests showed an increase of exoenzymes content and a higher presence of protein and carbohydrates degrading enzymes. Finally, the aerobic pre-treatment did not negatively impact methane potential of FW (496 NLCH4·kgVS-1) which remained unchanged after two days of pre-treatment at 21%O2. These latter optimal pre-treatment conditions are proposed to be tested in future investigation of anaerobic digestion (AD) process with low inoculum to substrate ratio in order to assess their ability to avoid acidification risk during AD of FW.
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Affiliation(s)
- Henry Fisgativa
- Irstea, UR OPAALE, 17 avenue de Cucillé, CS 64427, F-35044 Rennes Cedex, France
| | - Anne Tremier
- Irstea, UR OPAALE, 17 avenue de Cucillé, CS 64427, F-35044 Rennes Cedex, France.
| | - Mohamed Saoudi
- Irstea, UR OPAALE, 17 avenue de Cucillé, CS 64427, F-35044 Rennes Cedex, France
| | - Sophie Le Roux
- Irstea, UR OPAALE, 17 avenue de Cucillé, CS 64427, F-35044 Rennes Cedex, France
| | - Patrick Dabert
- Irstea, UR OPAALE, 17 avenue de Cucillé, CS 64427, F-35044 Rennes Cedex, France
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23
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Sukhesh MJ, Rao PV. Anaerobic digestion of crop residues: Technological developments and environmental impact in the Indian context. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2018. [DOI: 10.1016/j.bcab.2018.08.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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24
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Wu C, Yu M, Huang Q, Ma H, Gao M, Wang Q, Sakai K. Stimulation of methane yield rate from food waste by aerobic pre-treatment. BIORESOURCE TECHNOLOGY 2018; 261:279-287. [PMID: 29677655 DOI: 10.1016/j.biortech.2018.04.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Revised: 03/30/2018] [Accepted: 04/01/2018] [Indexed: 06/08/2023]
Abstract
Aerobic pre-treatment (AP) was applied to enhance methane yield from food waste through anaerobic digestion. Different AP durations (i.e. 2, 5 and 8 days) prior to anaerobic digestion were tested. The results indicated that AP of food waste led to no significant differences (p > 0.05) in methane yield potential (ca. 418 mL/g-VS). However, a suitable AP duration (5 days) increased methane yield rates (ca. 18 mL/d/g-VS; 22.0% higher than the control) by anticipating methane generation and shortening the methanogenic phase via volatile fatty acid reduction and pH increase. Although AP induced chemical oxygen demand loss to some extent (i.e. by 2.6%-9.9%) in the AP stage via aerobic degradation, the methane yield potential could be recovered by enhancing organic matter hydrolysis. Therefore, maximisation of hydrolysis should be used as a basis for determining a suitable AP duration for various types of organic matter.
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Affiliation(s)
- Chuanfu Wu
- Department of Environmental Engineering, School of Energy and Environmental Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China; Beijing Key Laboratory on Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 10083, China
| | - Miao Yu
- Department of Environmental Engineering, School of Energy and Environmental Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China
| | - Qiqi Huang
- Department of Environmental Engineering, School of Energy and Environmental Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China
| | - Hongzhi Ma
- Department of Environmental Engineering, School of Energy and Environmental Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China
| | - Ming Gao
- Department of Environmental Engineering, School of Energy and Environmental Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China; Beijing Key Laboratory on Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 10083, China.
| | - Qunhui Wang
- Department of Environmental Engineering, School of Energy and Environmental Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China; Beijing Key Laboratory on Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 10083, China
| | - Kenji Sakai
- Department of Bioscience and Biotechnology, Faculty of Agriculture Graduate School, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan
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25
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Kodama R, Sazawa K, Miyamoto T, Zhu Q, Igarashi M, Oda K, Kuramitz H, Fukushima M. Potential risk of coupling products between tetrahalobisphenol A and humic acid prepared via oxidation with a biomimetic catalyst. CHEMOSPHERE 2018; 204:63-70. [PMID: 29653323 DOI: 10.1016/j.chemosphere.2018.03.141] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Revised: 03/14/2018] [Accepted: 03/20/2018] [Indexed: 06/08/2023]
Abstract
Tetrahalobisphenol A (TXPBAs, X = Br or Cl), TBBPA and TCBPA, which are widely used as flame retardants, ultimately disposed of in landfills. In landfills, enzymatically oxidized TXBPAs can be covalently incorporated into humic acids (HAs) to form coupling products (HA-TXBPAs). In the present study, HA-TXBPAs were prepared by catalytic oxidation with iron(III)-phthalocyanine-tetrasulfate as a model of oxidative enzymes. The stability of HA-TXBPAs was evaluated by incubating them under physicochemical conditions of landfills (pH 9 and 50 °C). For HA-TBBPA, 18-26% of TBBPA was released from HA-TBBPA, due to the acid dissociation of the loosely bound TBBPA. However, no additional release was observed, even after 30 days, indicating that 74-82% of the TBBPA was incorporated into the HA. For HA-TCBPA, 3-4% of TCBPA and a major byproduct, 4-(2-hydroxyisopropyl)-2,6-dichlorophenol, was found to be loosely incorporated into HA. For both TBBPA and TCBPA, covalently bound organo-halogens were not released during the 30 days of incubation. Inhibition of the growth of Chlamydomonas reinhardtii was indicated when trace levels of TXBPAs (approximately 0.1 μM) were present. These results suggest that HA-TXBPAs contain not only covalently incorporated TXBPAs but also loosely bound TXBPAs and halophenols. The latter in HA-TXBPAs have the potential to leach from landfills and affect aquatic ecosystems.
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Affiliation(s)
- Ritsu Kodama
- Laboratory of Chemical Resource, Division of Sustainable Resources Engineering, Faculty of Engineering, Hokkaido University, Sapporo 060-8628, Japan
| | - Kazuto Sazawa
- Environmental Energy and Science, Graduate School of Science and Engineering for Research, University of Toyama, Gofuku 3190, Toyama 930-8555, Japan
| | - Takafumi Miyamoto
- Laboratory of Chemical Resource, Division of Sustainable Resources Engineering, Faculty of Engineering, Hokkaido University, Sapporo 060-8628, Japan
| | - Qianqian Zhu
- Laboratory of Chemical Resource, Division of Sustainable Resources Engineering, Faculty of Engineering, Hokkaido University, Sapporo 060-8628, Japan
| | - Mami Igarashi
- Laboratory of Chemical Resource, Division of Sustainable Resources Engineering, Faculty of Engineering, Hokkaido University, Sapporo 060-8628, Japan
| | - Kohki Oda
- Laboratory of Chemical Resource, Division of Sustainable Resources Engineering, Faculty of Engineering, Hokkaido University, Sapporo 060-8628, Japan; Graduate School of Environmental Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Hideki Kuramitz
- Environmental Energy and Science, Graduate School of Science and Engineering for Research, University of Toyama, Gofuku 3190, Toyama 930-8555, Japan.
| | - Masami Fukushima
- Laboratory of Chemical Resource, Division of Sustainable Resources Engineering, Faculty of Engineering, Hokkaido University, Sapporo 060-8628, Japan
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26
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Construction of Biodigesters to Optimize the Production of Biogas from Anaerobic Co-Digestion of Food Waste and Sewage. ENERGIES 2018. [DOI: 10.3390/en11040870] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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27
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Zhou M, Yan B, Wong JWC, Zhang Y. Enhanced volatile fatty acids production from anaerobic fermentation of food waste: A mini-review focusing on acidogenic metabolic pathways. BIORESOURCE TECHNOLOGY 2018; 248:68-78. [PMID: 28693950 DOI: 10.1016/j.biortech.2017.06.121] [Citation(s) in RCA: 265] [Impact Index Per Article: 44.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2017] [Revised: 06/21/2017] [Accepted: 06/22/2017] [Indexed: 05/11/2023]
Abstract
Recently, efficient disposal of food waste (FW) with potential resource recovery has attracted great attentions. Due to its easily biodegradable nature, rich nutrient availability and high moisture content, FW is regarded as favorable substrate for anaerobic digestion (AD). Both waste disposal and energy recovery can be fulfilled during AD of FW. Volatile fatty acids (VFAs) which are the products of the first-two stages of AD, are widely applied in chemical industry as platform chemicals recently. Concentration and distribution of VFAs is the result of acidogenic metabolic pathways, which can be affected by the micro-environment (e.g. pH) in the digester. Hence, the clear elucidation of the acidogenic metabolic pathways is essential for optimization of acidogenic process for efficient product recovery. This review summarizes major acidogenic metabolic pathways and regulating strategies for enhancing VFAs recovery during acidogenic fermentation of FW.
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Affiliation(s)
- Miaomiao Zhou
- Lab of Waste Valorization and Water Reuse, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, 189 Songling Road, Laoshan District, Qingdao 266101, PR China; University of Chinese Academy of Sciences, No.19A Yuquan Road, Beijing 100049, PR China
| | - Binghua Yan
- Lab of Waste Valorization and Water Reuse, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, 189 Songling Road, Laoshan District, Qingdao 266101, PR China.
| | - Jonathan W C Wong
- Sino-Forest Applied Research Centre for Pearl River Delta Environment, Department of Biology, Hong Kong Baptist University, PR China
| | - Yang Zhang
- Lab of Waste Valorization and Water Reuse, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, 189 Songling Road, Laoshan District, Qingdao 266101, PR China
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Kumar A, Roy A, Priyadarshinee R, Sengupta B, Malaviya A, Dasguptamandal D, Mandal T. Economic and sustainable management of wastes from rice industry: combating the potential threats. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:26279-26296. [PMID: 29032530 DOI: 10.1007/s11356-017-0293-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Accepted: 09/20/2017] [Indexed: 06/07/2023]
Abstract
Rice is one of the imperative staple foods, particularly in the developing countries. The exponential boom in human population has resulted in the continuous expansion in the rice industry in order to meet the food demands. The various stages of paddy processing release huge quantity of solid wastes, mainly rice husk, rice husk ash and liquid wastes in the form of rice industry wastewater. The discharge of the rice industry wastewater imparts a substantial threat to the aquatic bodies and the nearby surrounding and, thus, consequently demands eco-benign treatment plan. As a result, different strategies are needed to enhance the effluent quality and minimize the operational cost of the treatment process. Therefore, efficient technological approach targeting the minimization of pollution as well as assuring the economic prosperity should be implemented. In this review article, several aspects related to the rice industry discussing the significant challenges involved in the generation of both solid and liquid wastes, mitigation experiments and future prospects have been meticulously elaborated. Furthermore, the article also focuses on the various processes utilized for reducing the pollution load and promoting the practice of reuse and recycle of waste rather than the discharge action for the sake of sustainability and the emergence of novel techniques for the generation of energy and value-added products.
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Affiliation(s)
- Anuj Kumar
- Department of Chemical Engineering, National Institute of Technology, Durgapur, Mahatma Gandhi Avenue, Durgapur, West Bengal, 713209, India
| | - Abhishek Roy
- Department of Chemical Engineering, National Institute of Technology, Durgapur, Mahatma Gandhi Avenue, Durgapur, West Bengal, 713209, India
| | - Rashmi Priyadarshinee
- Department of Biotechnology, National Institute of Technology, Durgapur, Mahatma Gandhi Avenue, Durgapur, West Bengal, 713209, India
| | - Bratin Sengupta
- Department of Chemical Engineering, National Institute of Technology, Durgapur, Mahatma Gandhi Avenue, Durgapur, West Bengal, 713209, India
| | - Alok Malaviya
- Department of Life Science, Christ University, Hosur Road, Bengaluru, 560029, Karnataka, India
| | - Dalia Dasguptamandal
- Department of Biotechnology, National Institute of Technology, Durgapur, Mahatma Gandhi Avenue, Durgapur, West Bengal, 713209, India
| | - Tamal Mandal
- Department of Chemical Engineering, National Institute of Technology, Durgapur, Mahatma Gandhi Avenue, Durgapur, West Bengal, 713209, India.
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Kouas M, Torrijos M, Sousbie P, Steyer JP, Sayadi S, Harmand J. Robust assessment of both biochemical methane potential and degradation kinetics of solid residues in successive batches. WASTE MANAGEMENT (NEW YORK, N.Y.) 2017; 70:59-70. [PMID: 28899591 DOI: 10.1016/j.wasman.2017.09.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Revised: 08/25/2017] [Accepted: 09/01/2017] [Indexed: 06/07/2023]
Abstract
The well-known batch assay test is used worldwide to determine the biochemical methane potential (BMP) of solid substrates in a single batch but its use to estimate the degradation kinetics may lead to underestimations. To overcome this problem, a different approach was carried out to characterize simultaneously both BMP of solid substrates and their degradation kinetics in successive batches, i.e. after an acclimation period. In a second step, a simple model was developed based on the methane production curve in batch mode for dividing the organic matter of the substrate into three sub-fractions according to their degradation rates (rapid, moderate and slow). The protocol developed was applied to 50 different substrates and a database was built. This database includes: the overall BMP (mL CH4/g VS) and the degradation kinetics for each substrate, i.e. the global specific organic degradation rate (g VS/g VSS.d) along with the 3 sub-fractions and their specific degradation rates. The comparison with the BMP from the literature did not highlight significant difference with the BMP measured in this study. Furthermore, the degradation rates seem to be specific characteristics for each substrate and no clear correlation was found between the degradation kinetics and the kind of substrates. The information available in the database will be useful for the design and operation of anaerobic digesters: Optimization of the mix of co-substrates, choice of the applied OLR, simulation of methane production and of the rate of substrate degradation.
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Affiliation(s)
- Mokhles Kouas
- LBE, INRA, 102 avenue des Etangs, 11100 Narbonne, France; Laboratory of Environmental Bioprocesses, Centre of Biotechnology of Sfax, University of Sfax, Sidi Mansour Road km 6, PO Box «1177», 3018 Sfax, Tunisia.
| | | | | | | | - Sami Sayadi
- Laboratory of Environmental Bioprocesses, Centre of Biotechnology of Sfax, University of Sfax, Sidi Mansour Road km 6, PO Box «1177», 3018 Sfax, Tunisia.
| | - Jérôme Harmand
- LBE, INRA, 102 avenue des Etangs, 11100 Narbonne, France.
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Tsapekos P, Kougias PG, Vasileiou SA, Lyberatos G, Angelidaki I. Effect of micro-aeration and inoculum type on the biodegradation of lignocellulosic substrate. BIORESOURCE TECHNOLOGY 2017; 225:246-253. [PMID: 27898314 DOI: 10.1016/j.biortech.2016.11.081] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Revised: 11/18/2016] [Accepted: 11/19/2016] [Indexed: 06/06/2023]
Abstract
The effect of various micro-aeration strategies on the anaerobic digestion (AD) of wheat straw was thoroughly examined using a mixture of inocula, containing compost and well digested sludge from biogas plant. The aim was to determine the most efficient oxygen load, pulse repetition and treatment duration, resulting in the highest methane production. The oxygen load had the largest impact on the biodegradability of straw, among the examined variables. More specifically, a micro-aeration intensity of 10mLO2/gVS was identified as the critical threshold above which the AD performance was more susceptible to instability. The highest enhancement in biogas production was achieved by injecting 5mLO2/gVS for a consecutive 3-day treatment period, presenting a 7.2% increase compared to the untreated wheat straw. Nevertheless, the results from optimisation case study indicated a higher increase of 9% by injecting 7.3mLO2/gVS, distributed in 2 pulses during a slightly shorter treatment period (i.e. 47h).
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Affiliation(s)
- P Tsapekos
- Department of Environmental Engineering, Technical University of Denmark, Kgs. Lyngby DK-2800, Denmark
| | - P G Kougias
- Department of Environmental Engineering, Technical University of Denmark, Kgs. Lyngby DK-2800, Denmark.
| | - S A Vasileiou
- Department of Environmental Engineering, Technical University of Denmark, Kgs. Lyngby DK-2800, Denmark; School of Chemical Engineering, National Technical University of Athens, Zografou Campus, Athens 15780, Greece
| | - G Lyberatos
- School of Chemical Engineering, National Technical University of Athens, Zografou Campus, Athens 15780, Greece
| | - I Angelidaki
- Department of Environmental Engineering, Technical University of Denmark, Kgs. Lyngby DK-2800, Denmark
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Tu X, Aneksampant A, Kobayashi S, Tanaka A, Nishimoto R, Fukushima M. Advantages and risks of using steel slag in preparing composts from raw organic waste. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART. B, PESTICIDES, FOOD CONTAMINANTS, AND AGRICULTURAL WASTES 2017; 52:30-36. [PMID: 27737616 DOI: 10.1080/03601234.2016.1224701] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
It had been reported that iron and manganese oxides in steel slag enhanced the production of humic acid (HA) from low-molecular-weight compounds, such as phenolic acids, amino acids, and saccharides. In the present study, this function of steel slag was applied to the composting of raw organic wastes (ROWs). The degree of humification of HAs is an important factor in evaluating compost quality. Thus, HAs were extracted from the prepared composts and the humification parameters were determined, in terms of elemental compositions, acidic functional group contents, molecular weights, spectroscopic parameters from UV-vis absorption and 13C NMR spectra. The timing for adding steel slag affected the degree of humification of HAs in the composts. The weight average molecular weight of a HA when slag was added initially (29 kDa) was significantly higher than when slag was added after elevating the temperature of the compost pile (17-18 kDa). These results show that ROWs are decomposed to low-molecular-weight compounds after the pile temperature is elevated and the presence of slag enhances the polycondensation of these compounds to produce HAs with a higher degree of humification. Because the slag used in the present study contained several-tens ng g-1 to several μg g-1 of toxic elements (B, Cu, Cr, and Zn), leaching tests for these elements from the prepared composts were carried out. Levels for leaching boron from composts prepared by adding slag (0.2-0.4 mg L-1) were obviously higher than the corresponding levels without slag (0.05 mg L-1).
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Affiliation(s)
- Xuefei Tu
- a Laboratory of Chemical Resources, Division of Sustainable Resources Engineering, Faculty of Engineering , Hokkaido University , Sapporo , Japan
| | - Apichaya Aneksampant
- a Laboratory of Chemical Resources, Division of Sustainable Resources Engineering, Faculty of Engineering , Hokkaido University , Sapporo , Japan
| | - Shizusa Kobayashi
- a Laboratory of Chemical Resources, Division of Sustainable Resources Engineering, Faculty of Engineering , Hokkaido University , Sapporo , Japan
| | - Atsushi Tanaka
- a Laboratory of Chemical Resources, Division of Sustainable Resources Engineering, Faculty of Engineering , Hokkaido University , Sapporo , Japan
| | - Ryo Nishimoto
- a Laboratory of Chemical Resources, Division of Sustainable Resources Engineering, Faculty of Engineering , Hokkaido University , Sapporo , Japan
| | - Masami Fukushima
- a Laboratory of Chemical Resources, Division of Sustainable Resources Engineering, Faculty of Engineering , Hokkaido University , Sapporo , Japan
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Zhou Y, Li C, Nges IA, Liu J. The effects of pre-aeration and inoculation on solid-state anaerobic digestion of rice straw. BIORESOURCE TECHNOLOGY 2017; 224:78-86. [PMID: 27919545 DOI: 10.1016/j.biortech.2016.11.104] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Revised: 11/24/2016] [Accepted: 11/27/2016] [Indexed: 06/06/2023]
Abstract
Pre-aeration was investigated for enhancing biodegradation of recalcitrant lignocellulosic structure of rice straw under various low temperatures regimes (25, 35 and 45°C) and aeration durations (0, 2, 4, 6 and 8days). It was demonstrated aerated rice straw for 2days at 35°C resulted in highest hydrolytic efficiency and biochemical methane potential (BMP) (355.3±18.7mlCH4/gVS). Furthermore, both methane yields and initiation speeds of the solid-state anaerobic digestion (SS-AD) were inversely proportional to substrate-to-inoculum ratios due to the accumulation of volatile fatty acids (VFAs) and poor mass transfer. The highest methane yield achieved under SS-AD was 234mlCH4/gVS at TS of 16% which 72% of the BMP. Inoculum dilution with recycled water improved buffering capacity and mitigated accumulation of VFAs, resulting in an improved SS-AD performance. The combined pre-aeration and SS-AD was therefore established as a viable option to accelerate methane production for lignocellulosic biomass.
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Affiliation(s)
- Ying Zhou
- Department of Biotechnology, Lund University, Naturvetarvägen 14, SE-223 62 Lund, Sweden; Nova Skantek Environmental Technology (Beijing) Co., Ltd, Beijing 100027, China
| | - Chao Li
- Department of Biotechnology, Lund University, Naturvetarvägen 14, SE-223 62 Lund, Sweden; Nova Skantek Environmental Technology (Beijing) Co., Ltd, Beijing 100027, China.
| | - Ivo Achu Nges
- Department of Biotechnology, Lund University, Naturvetarvägen 14, SE-223 62 Lund, Sweden
| | - Jing Liu
- Department of Biotechnology, Lund University, Naturvetarvägen 14, SE-223 62 Lund, Sweden; Nova Skantek Environmental Technology (Beijing) Co., Ltd, Beijing 100027, China
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Rafieenia R, Girotto F, Peng W, Cossu R, Pivato A, Raga R, Lavagnolo MC. Effect of aerobic pre-treatment on hydrogen and methane production in a two-stage anaerobic digestion process using food waste with different compositions. WASTE MANAGEMENT (NEW YORK, N.Y.) 2017; 59:194-199. [PMID: 27789105 DOI: 10.1016/j.wasman.2016.10.028] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2016] [Revised: 10/18/2016] [Accepted: 10/20/2016] [Indexed: 06/06/2023]
Abstract
Aerobic pre-treatment was applied prior to two-stage anaerobic digestion process. Three different food wastes samples, namely carbohydrate rich, protein rich and lipid rich, were prepared as substrates. Effect of aerobic pre-treatment on hydrogen and methane production was studied. Pre-aeration of substrates showed no positive impact on hydrogen production in the first stage. All three categories of pre-aerated food wastes produced less hydrogen compared to samples without pre-aeration. In the second stage, methane production increased for aerated protein rich and carbohydrate rich samples. In addition, the lag phase for carbohydrate rich substrate was shorter for aerated samples. Aerated protein rich substrate yielded the best results among substrates for methane production, with a cumulative production of approximately 351ml/gVS. With regard to non-aerated substrates, lipid rich was the best substrate for CH4 production (263ml/gVS). Pre-aerated P substrate was the best in terms of total energy generation which amounted to 9.64kJ/gVS. This study revealed aerobic pre-treatment to be a promising option for use in achieving enhanced substrate conversion efficiencies and CH4 production in a two-stage AD process, particularly when the substrate contains high amounts of proteins.
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Affiliation(s)
- Razieh Rafieenia
- Department of Industrial Engineering, University of Padova, Via Marzolo 9, 35131 Padova, Italy.
| | - Francesca Girotto
- Department of Industrial Engineering, University of Padova, Via Marzolo 9, 35131 Padova, Italy
| | - Wei Peng
- Department of Industrial Engineering, University of Padova, Via Marzolo 9, 35131 Padova, Italy
| | - Raffaello Cossu
- Department of Industrial Engineering, University of Padova, Via Marzolo 9, 35131 Padova, Italy
| | - Alberto Pivato
- Department of Industrial Engineering, University of Padova, Via Marzolo 9, 35131 Padova, Italy
| | - Roberto Raga
- Department of Industrial Engineering, University of Padova, Via Marzolo 9, 35131 Padova, Italy
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Wu B, Wang X, Deng YY, He XL, Li ZW, Li Q, Qin H, Chen JT, He MX, Zhang M, Hu GQ, Yin XB. Adaption of microbial community during the start-up stage of a thermophilic anaerobic digester treating food waste. Biosci Biotechnol Biochem 2016; 80:2025-32. [DOI: 10.1080/09168451.2016.1191326] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Abstract
A successful start-up enables acceleration of anaerobic digestion (AD) into steady state. The microbial community influences the AD performance during the start-up. To investigate how microbial communities changed during the start-up, microbial dynamics was analyzed via high-throughput sequencing in this study. The results confirmed that the AD was started up within 25 d. Thermophilic methanogens and bacterial members functioning in hydrolysis, acidogenesis, and syntrophic oxidation became predominant during the start-up stage, reflecting a quick adaption of microorganisms to operating conditions. Such predominance also indicated the great contribution of these members to the fast start-up of AD. Redundancy analysis confirmed that the bacterial abundance significantly correlated with AD conditions. The stable ratio of hydrogenotrophic methanogens to aceticlastic methanogens is also important to maintain the stability of the AD process. This work will be helpful to understand the contribution of microbial community to the start-up of AD.
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Affiliation(s)
- Bo Wu
- Biogas Institute of Ministry of Agriculture, Chengdu, China
| | - Xing Wang
- Biogas Institute of Ministry of Agriculture, Chengdu, China
- Graduate School of Chinese Academy of Agricultural Sciences, Beijing, China
| | - Ya-Yue Deng
- Biogas Institute of Ministry of Agriculture, Chengdu, China
| | - Xiao-Lan He
- Institute of Soil and Fertilizer, Sichuan Academy of Agricultural Sciences, Chengdu, China
| | - Zheng-Wei Li
- Biogas Institute of Ministry of Agriculture, Chengdu, China
- Graduate School of Chinese Academy of Agricultural Sciences, Beijing, China
| | - Qiang Li
- Biogas Institute of Ministry of Agriculture, Chengdu, China
| | - Han Qin
- Biogas Institute of Ministry of Agriculture, Chengdu, China
| | - Jing-Tao Chen
- Biogas Institute of Ministry of Agriculture, Chengdu, China
- Graduate School of Chinese Academy of Agricultural Sciences, Beijing, China
| | - Ming-Xiong He
- Biogas Institute of Ministry of Agriculture, Chengdu, China
| | - Min Zhang
- Biogas Institute of Ministry of Agriculture, Chengdu, China
| | - Guo-Quan Hu
- Biogas Institute of Ministry of Agriculture, Chengdu, China
| | - Xiao-Bo Yin
- Biogas Institute of Ministry of Agriculture, Chengdu, China
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35
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Nair VV, Dhar H, Kumar S, Thalla AK, Mukherjee S, Wong JWC. Artificial neural network based modeling to evaluate methane yield from biogas in a laboratory-scale anaerobic bioreactor. BIORESOURCE TECHNOLOGY 2016; 217:90-99. [PMID: 27005793 DOI: 10.1016/j.biortech.2016.03.046] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2015] [Revised: 03/06/2016] [Accepted: 03/08/2016] [Indexed: 06/05/2023]
Abstract
The performance of a laboratory-scale anaerobic bioreactor was investigated in the present study to determine methane (CH4) content in biogas yield from digestion of organic fraction of municipal solid waste (OFMSW). OFMSW consists of food waste, vegetable waste and yard trimming. An organic loading between 40 and 120kgVS/m(3) was applied in different runs of the bioreactor. The study was aimed to focus on the effects of various factors, such as pH, moisture content (MC), total volatile solids (TVS), volatile fatty acids (VFAs), and CH4 fraction on biogas production. OFMSW witnessed high CH4 yield as 346.65LCH4/kgVS added. A target of 60-70% of CH4 fraction in biogas was set as an optimized condition. The experimental results were statistically optimized by application of ANN model using free forward back propagation in MATLAB environment.
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Affiliation(s)
- Vijay V Nair
- Solid and Hazardous Waste Management Division (SHWMD), CSIR-NEERI, Nagpur 440 020, India; NITK, Surathkal, Mangalore 575 025, India
| | - Hiya Dhar
- Solid and Hazardous Waste Management Division (SHWMD), CSIR-NEERI, Nagpur 440 020, India; Department of Civil Engineering, Jadavpur University, Kolkata 700 032, India
| | - Sunil Kumar
- Solid and Hazardous Waste Management Division (SHWMD), CSIR-NEERI, Nagpur 440 020, India.
| | | | - Somnath Mukherjee
- Department of Civil Engineering, Jadavpur University, Kolkata 700 032, India
| | - Jonathan W C Wong
- Hong Kong Baptist University, Hong Kong Special Administrative Region
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Xu Q, Tian Y, Kim H, Ko JH. Comparison of biogas recovery from MSW using different aerobic-anaerobic operation modes. WASTE MANAGEMENT (NEW YORK, N.Y.) 2016; 56:190-195. [PMID: 27426021 DOI: 10.1016/j.wasman.2016.07.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Revised: 07/04/2016] [Accepted: 07/04/2016] [Indexed: 06/06/2023]
Abstract
Aeration pretreatment was demonstrated as an efficient technology to promote methane recovery from a bioreactor landfill with high food waste content. In this study, a short-term experiment was conducted to investigate the effects of aerobic-anaerobic operation modes on biogas recovery. Three landfill-simulated columns (anaerobic control (A1), a constant aeration (C1) and a gradually reduced aeration (C2)) were constructed and operated for 130days. The aeration frequency was adjusted by oxygen consumption in an aerated MSW landfill. After aerobic pretreatment was halted, the methanogenic phase was rapidly developed in both the C1 and C2 columns, reducing the volatile fatty acid (VFA) concentrations and increasing pH. The methane volumes per dry MSW produced from the C1 and C2 columns were approximately 62L/kg VS and 75L/kg VS, respectively, while methane produced from the A1 column was almost negligible. The result clearly showed that aerobic pretreatment with gradual reduction of aeration rates could not only improve methane recovery from waste decomposition, but also enhance leachate COD and VFA removal.
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Affiliation(s)
- Qiyong Xu
- Key Laboratory for Eco-efficient Polysilicate Materials, School of Environment and Energy, Peking University Shenzhen Graduate School, Guangdong 518055, China
| | - Ying Tian
- Key Laboratory for Eco-efficient Polysilicate Materials, School of Environment and Energy, Peking University Shenzhen Graduate School, Guangdong 518055, China
| | - Hwidong Kim
- Department of Environmental Science and Engineering, Gannon University, Erie, PA 16541, USA
| | - Jae Hac Ko
- Key Laboratory for Eco-efficient Polysilicate Materials, School of Environment and Energy, Peking University Shenzhen Graduate School, Guangdong 518055, China.
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Meng Y, Jost C, Mumme J, Wang K, Linke B. Oxygen tolerance capacity of upflow anaerobic solid-state (UASS) with anaerobic filter (AF) system. J Environ Sci (China) 2016; 45:200-206. [PMID: 27372134 DOI: 10.1016/j.jes.2016.01.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2015] [Revised: 01/18/2016] [Accepted: 01/21/2016] [Indexed: 06/06/2023]
Abstract
In order to investigate the oxygen tolerance capacity of upflow anaerobic solid-state (UASS) with anaerobic filter (AF) system, the effect of microaeration on thermophilic anaerobic digestion of maize straw was investigated under batch conditions and in the UASS with AF system. Aeration intensities of 0-431mL O2/gvs were conducted as pretreatment under batch conditions. Aeration pretreatment obviously enhanced anaerobic digestion and an aeration intensity of 431mL O2/gvs increased the methane yield by 82.2%. Aeration intensities of 0-355mL O2/gvs were conducted in the process liquor circulation of the UASS with AF system. Dissolved oxygen (DO) of UASS and AF reactors kept around 1.39±0.27 and 0.99±0.38mg/L, respectively. pH was relatively stable around 7.11±0.04. Volatile fatty acids and soluble chemical oxygen demand concentration in UASS reactor were higher than those in AF reactor. Methane yield of the whole system was almost stable at 85±7mL/gvs as aeration intensity increased step by step. The UASS with AF system showed good oxygen tolerance capacity.
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Affiliation(s)
- Yao Meng
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China; Department Bioengineering, Leibniz Institute for Agricultural Engineering, Max-Eyth-Allee 100, 14469 Potsdam, Germany.
| | - Carsten Jost
- Department Bioengineering, Leibniz Institute for Agricultural Engineering, Max-Eyth-Allee 100, 14469 Potsdam, Germany
| | - Jan Mumme
- UK Biochar Centre, School of GeoSciences, University of Edinburgh, Crew Building, King's Buildings, Edinburgh EH9 3JN, UK
| | - Kaijun Wang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China.
| | - Bernd Linke
- Department Bioengineering, Leibniz Institute for Agricultural Engineering, Max-Eyth-Allee 100, 14469 Potsdam, Germany
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38
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Fisgativa H, Tremier A, Dabert P. Characterizing the variability of food waste quality: A need for efficient valorisation through anaerobic digestion. WASTE MANAGEMENT (NEW YORK, N.Y.) 2016; 50:264-274. [PMID: 26868845 DOI: 10.1016/j.wasman.2016.01.041] [Citation(s) in RCA: 94] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Revised: 01/26/2016] [Accepted: 01/29/2016] [Indexed: 06/05/2023]
Abstract
In order to determine the variability of food waste (FW) characteristics and the influence of these variable values on the anaerobic digestion (AD) process, FW characteristics from 70 papers were compiled and analysed statistically. Results indicated that FW characteristics values are effectively very variable and that 24% of these variations may be explained by the geographical origin, the type of collection source and the season of the collection. Considering the whole range of values for physicochemical characteristics (especially volatile solids (VS), chemical oxygen demand (COD) and biomethane potential (BMP)), FW show good potential for AD treatment. However, the high carbohydrates contents (36.4%VS) and the low pH (5.1) might cause inhibitions by the rapid acidification of the digesters. As regards the variation of FW characteristics, FW categories were proposed. Moreover, the adequacy of FW characteristics with AD treatment was discussed. Four FW categories were identified with critical characteristics values for AD performance: (1) the high dry matter (DM) and total ammonia nitrogen (TAN) content of FW collected with green waste, (2) the high cellulose (CEL) content of FW from the organic fraction of municipal solid waste, (3) the low carbon-to-nitrogen (C/N) ratio of FW collected during summer, (4) the high value of TAN and Na of FW from Asia. For these cases, an aerobic pre-treatment or a corrective treatment seems to be advised to avoid instabilities along the digestion. Finally, the results of this review-paper provide a data basis of values for FW characteristics that could be used for AD process design and environmental assessment.
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Affiliation(s)
- Henry Fisgativa
- Irstea, UR GERE, 17 avenue de Cucillé, CS 64427, F-35044 Rennes Cedex, France
| | - Anne Tremier
- Irstea, UR GERE, 17 avenue de Cucillé, CS 64427, F-35044 Rennes Cedex, France.
| | - Patrick Dabert
- Irstea, UR GERE, 17 avenue de Cucillé, CS 64427, F-35044 Rennes Cedex, France
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Degueurce A, Tomas N, Le Roux S, Martinez J, Peu P. Biotic and abiotic roles of leachate recirculation in batch mode solid-state anaerobic digestion of cattle manure. BIORESOURCE TECHNOLOGY 2016; 200:388-395. [PMID: 26512863 DOI: 10.1016/j.biortech.2015.10.060] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Revised: 10/16/2015] [Accepted: 10/17/2015] [Indexed: 06/05/2023]
Abstract
Solid state anaerobic digestion, with leachate recirculation, is suitable for exploiting manure with a high solid content. The biotic and abiotic effects of the leachates were studied in lab-scale leach bed reactors (LBRs). LBRs were fed with cow manure and four leachates either biologically active or inert. The biotic impact of leachate was assessed by monitoring the microbial communities in the manure and in the leachates. LBRs with biologically active leachates, regardless to their origin, produced equivalent methane volumes (114.52±19.05 and 99.79±6.4NL/kgVS) while LBRs with inert leachates produced half less methane (60.22±5.71 and 58.87±13.2NL/kgVS) attesting to the biotic role of leachate. Moreover, its beneficial abiotic role is mainly due to its initial nutrient content, pH, and buffering capacity. The microbial community in the manure was strongly involved in methane production, and no transfer of microorganisms from the liquid phase was found (p<0.05).
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Affiliation(s)
- Axelle Degueurce
- Irstea, UR GERE, 17 av. de Cucillé, CS 64427, F-35044 Rennes, France; Université Européenne de Bretagne, F-35044 Rennes, France
| | - Nair Tomas
- Irstea, UR GERE, 17 av. de Cucillé, CS 64427, F-35044 Rennes, France; Université Européenne de Bretagne, F-35044 Rennes, France
| | - Sophie Le Roux
- Irstea, UR GERE, 17 av. de Cucillé, CS 64427, F-35044 Rennes, France; Université Européenne de Bretagne, F-35044 Rennes, France
| | - José Martinez
- Irstea, UR GERE, 17 av. de Cucillé, CS 64427, F-35044 Rennes, France; Université Européenne de Bretagne, F-35044 Rennes, France
| | - Pascal Peu
- Irstea, UR GERE, 17 av. de Cucillé, CS 64427, F-35044 Rennes, France; Université Européenne de Bretagne, F-35044 Rennes, France.
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Chen Y, Zhao J, Li K, Xie S. A novel fast mass transfer anaerobic inner loop fluidized bed biofilm reactor for PTA wastewater treatment. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2016; 74:1088-1095. [PMID: 27642828 DOI: 10.2166/wst.2016.285] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In this paper, a fast mass transfer anaerobic inner loop fluidized bed biofilm reactor (ILFBBR) was developed to improve purified terephthalic acid (PTA) wastewater treatment. The emphasis of this study was on the start-up mode of the anaerobic ILFBBR, the hydraulic loadings and the operation stability. The biological morphology of the anaerobic biofilm in the reactors was also analyzed. The anaerobic column could operate successfully for 46 days due to the pre-aerating process. The anaerobic column had the capacity to resist shock loadings and maintained a high stable chemical oxygen demand (COD) and terephthalic acid removal rates at a hydraulic retention time of 5-10 h, even under conditions of organic volumetric loadings as high as 28.8 kg COD·m(-3).d(-1). The scanning electron microscope analysis of the anaerobic carrier demonstrated that clusters of prokaryotes grew inside of pores and that the filaments generated by pre-aeration contributed to the anaerobic biofilm formation and stability.
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Affiliation(s)
- Yingwen Chen
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 210009, China E-mail:
| | - Jinlong Zhao
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 210009, China E-mail:
| | - Kai Li
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 210009, China E-mail:
| | - Shitao Xie
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 210009, China E-mail:
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Fu SF, He S, Shi XS, Katukuri NR, Dai M, Guo RB. The chemical properties and microbial community characterization of the thermophilic microaerobic pretreatment process. BIORESOURCE TECHNOLOGY 2015; 198:497-502. [PMID: 26433149 DOI: 10.1016/j.biortech.2015.09.029] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2015] [Revised: 09/10/2015] [Accepted: 09/11/2015] [Indexed: 05/09/2023]
Abstract
Thermophilic microaerobic pretreatment (TMP) was recently reported as an efficient pretreatment method of anaerobic digestion (AD). In this study, the chemical properties and microbial community were characterized to reveal how TMP working. Compared with thermophilic treatment under anaerobic condition (TMP0), cellulase activity obviously improved under microaerobic condition (TMP1), which was 10.9-49.0% higher than that of TMP0. Reducing sugar, SCOD and VFAs concentrations of TMP1 were 2.6-8.9%, 1.8-4.8% and 13.8-24% higher than those of TMP0, respectively. TMP gave obvious rise to phylum Firmicutes, which associated with extracellular enzymes production. The proportion of class Bacilli (belongs to phylum Firmicutes and mainly acts during hydrolysis) in TMP1 was 124.89% higher than that of TMP0, which reflected the greater hydrolytic ability under microaerobic condition. The improved abundance of phylum Firmicutes (especially class Bacilli, order Bacillales) under microaerobic condition could be the fundamental reason for the improved AD performance of thermophilic microaerobic pretreated corn straw.
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Affiliation(s)
- Shan-Fei Fu
- Shandong Industrial Engineering Laboratory of Biogas Production & Utilization, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong Province 266101, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Shuai He
- Shandong Industrial Engineering Laboratory of Biogas Production & Utilization, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong Province 266101, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Xiao-Shuang Shi
- Shandong Industrial Engineering Laboratory of Biogas Production & Utilization, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong Province 266101, PR China
| | - Naveen Reddy Katukuri
- Shandong Industrial Engineering Laboratory of Biogas Production & Utilization, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong Province 266101, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Meng Dai
- Shandong Industrial Engineering Laboratory of Biogas Production & Utilization, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong Province 266101, PR China
| | - Rong-Bo Guo
- Shandong Industrial Engineering Laboratory of Biogas Production & Utilization, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong Province 266101, PR China.
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Alexis POB, Patricia TL, Fernando MRL, Marcela CCL, Carlos VF, Alexander TLW, Abdón OAJ. Efecto de la relación sustrato-inóculo sobre el potencial bioquímico de metano de biorresiduos de origen municipal. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.riit.2015.09.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Xu Q, Tian Y, Wang S, Ko JH. A comparative study of leachate quality and biogas generation in simulated anaerobic and hybrid bioreactors. WASTE MANAGEMENT (NEW YORK, N.Y.) 2015; 41:94-100. [PMID: 25857421 DOI: 10.1016/j.wasman.2015.03.023] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2014] [Revised: 03/16/2015] [Accepted: 03/16/2015] [Indexed: 06/04/2023]
Abstract
Research has been conducted to compare leachate characterization and biogas generation in simulated anaerobic and hybrid bioreactor landfills with typical Chinese municipal solid waste (MSW). Three laboratory-scale reactors, an anaerobic (A1) and two hybrid bioreactors (C1 and C2), were constructed and operated for about 10months. The hybrid bioreactors were operated in an aerobic-anaerobic mode with different aeration frequencies by providing air into the upper layer of waste. Results showed that the temporary aeration into the upper layer aided methane generation by shortening the initial acidogenic phase because of volatile fatty acids (VFAs) reduction and pH increase. Chemical oxygen demand (COD) decreased faster in the hybrid bioreactors, but the concentrations of ammonia-nitrogen in the hybrid bioreactors were greater than those in the anaerobic control. Methanogenic conditions were established within 75d and 60d in C1 and C2, respectively. However, high aeration frequency led to the consumption of organic matters by aerobic degradation and resulted in reducing accumulative methane volume. The temporary aeration enhanced waste settlement and the settlement increased with increasing the frequency of aeration. Methane production was inhibited in the anaerobic control; however, the total methane generations from hybrid bioreactors were 133.4L/kgvs and 113.2L/kgvs. As for MSW with high content of food waste, leachate recirculation right after aeration stopped was not recommended due to VFA inhibition for methanogens.
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Affiliation(s)
- Qiyong Xu
- Key Laboratory for Eco-Efficient Polysilicate Materials, School of Environment and Energy, Peking University Shenzhen Graduate School, Guangdong 518055, China
| | - Ying Tian
- Key Laboratory for Eco-Efficient Polysilicate Materials, School of Environment and Energy, Peking University Shenzhen Graduate School, Guangdong 518055, China
| | - Shen Wang
- Key Laboratory for Eco-Efficient Polysilicate Materials, School of Environment and Energy, Peking University Shenzhen Graduate School, Guangdong 518055, China
| | - Jae Hac Ko
- Key Laboratory for Eco-Efficient Polysilicate Materials, School of Environment and Energy, Peking University Shenzhen Graduate School, Guangdong 518055, China.
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Fu SF, Shi XS, Xu XH, Wang CS, Wang L, Dai M, Guo RB. Secondary thermophilic microaerobic treatment in the anaerobic digestion of corn straw. BIORESOURCE TECHNOLOGY 2015; 186:321-324. [PMID: 25818257 DOI: 10.1016/j.biortech.2015.03.053] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2015] [Revised: 03/09/2015] [Accepted: 03/10/2015] [Indexed: 06/04/2023]
Abstract
Thermophilic microaerobic pretreatment (TMP) has been proved to be an alternative pretreatment method during anaerobic digestion (AD) of corn straw. In this study, in order to improve the fermentation efficiency during late AD stage, improve the methane yield and volatile solid (VS) removal efficiency, a secondary thermophilic microaerobic treatment (STMT) was applied in the late AD stage of corn straw. Results showed STMT obviously improved the fermentation efficiency, methane yield and VS removal efficiency. The maximum methane yield and maximum VS removal efficiency were simultaneously obtained when the oxygen loads during STMT was 10 ml/g VS (VS of residual substrate). The maximum methane yield was 380.6 ml/g VS(substrate), which was 28.45% and 10.61% higher than those of untreated and once thermophilic microaerobic pretreated samples, respectively. The maximum VS removal efficiency was 81.85%, which was 29.43% and 17.23% higher than those of untreated and once thermophilic microaerobic pretreated samples, respectively.
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Affiliation(s)
- Shan-Fei Fu
- Shandong Industrial Engineering Laboratory of Biogas Production & Utilization, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong Province 266101, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Xiao-Shuang Shi
- Shandong Industrial Engineering Laboratory of Biogas Production & Utilization, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong Province 266101, PR China
| | - Xiao-Hui Xu
- Shandong Industrial Engineering Laboratory of Biogas Production & Utilization, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong Province 266101, PR China
| | - Chuan-Shui Wang
- Shandong Industrial Engineering Laboratory of Biogas Production & Utilization, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong Province 266101, PR China
| | - Lin Wang
- Shandong Industrial Engineering Laboratory of Biogas Production & Utilization, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong Province 266101, PR China
| | - Meng Dai
- Shandong Industrial Engineering Laboratory of Biogas Production & Utilization, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong Province 266101, PR China
| | - Rong-Bo Guo
- Shandong Industrial Engineering Laboratory of Biogas Production & Utilization, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong Province 266101, PR China.
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45
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Xia X, Zhu X, Yang H, Xin Y, Wang W. Enhancement of rice vinegar production by modified semi-continuous culture based on analysis of enzymatic kinetic. Eur Food Res Technol 2015. [DOI: 10.1007/s00217-015-2477-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Lagerkvist A, Pelkonen M, Wikström T. Quick-start of full-scale anaerobic digestion (AD) using aeration. WASTE MANAGEMENT (NEW YORK, N.Y.) 2015; 38:102-104. [PMID: 25636861 DOI: 10.1016/j.wasman.2014.12.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2014] [Revised: 11/03/2014] [Accepted: 12/16/2014] [Indexed: 06/04/2023]
Abstract
A conventional 1300 m(3) continuously stirred anaerobic tank reactor at the city of Boden, north Sweden, which was receiving a feed of both sewage sludge and food waste, was put out of operation due to the build-up of a float phase. The reactor was emptied and cleaned. At start-up there was no methanogenic sludge available, so an unconventional start-up procedure was applied: The reactor was rapidly (8 days with 1200 kg of total solids (TS) added daily) filled with thickened, and slightly acidic sewage sludge, showing only slight methane generation, which was subsequently heated to 55 °C. Then compressed air was blown into the digester and within a month a fully functional methanogenic culture was established. The transfer from acidogenic to methanogenic conditions happened in about one week. As a start-up technique this is fast and cost efficient, it only requires the access of a compressor, electricity and a source of air. In total, about 16 tonnes of oxygen were used. It is proposed that this method may also be used as an operational amendment technique, should a reactor tend to acidify.
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Affiliation(s)
- Anders Lagerkvist
- Waste Science and Technology, Luleå University of Technology, 97187 Luleå, Sweden.
| | - Markku Pelkonen
- Waste Science and Technology, Luleå University of Technology, 97187 Luleå, Sweden
| | - Tommy Wikström
- Waste Science and Technology, Luleå University of Technology, 97187 Luleå, Sweden
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Sheets JP, Ge X, Li Y. Effect of limited air exposure and comparative performance between thermophilic and mesophilic solid-state anaerobic digestion of switchgrass. BIORESOURCE TECHNOLOGY 2015; 180:296-303. [PMID: 25618499 DOI: 10.1016/j.biortech.2015.01.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2014] [Revised: 01/01/2015] [Accepted: 01/03/2015] [Indexed: 06/04/2023]
Abstract
Switchgrass is an attractive feedstock for biogas production via anaerobic digestion (AD). Many studies have used switchgrass for liquid anaerobic digestion (L-AD), but few have used switchgrass for solid-state anaerobic digestion (SS-AD). Limited air exposure to the reactor headspace has been adopted in commercial scale anaerobic digesters for different applications. However, little research has examined the effect of limited air exposure on biogas production during SS-AD. In this study, the effects of air exposure and total solids (TS) content on SS-AD performance were evaluated under mesophilic (36±1°C) and thermophilic (55±0.3°C) conditions. Limited air exposure did not significantly influence the methane yield during SS-AD. Thermophilic SS-AD had greater methane yields (102-145LCH4kg(-1)VSadded) than mesophilic SS-AD (88-113LCH4kg(-1)VSadded). Both mesophilic SS-AD (73-136GJ) and thermophilic SS-AD (2-95GJ) produced positive net energy based on a theoretical 'garage-type' SS-AD digester operating in a temperate climate.
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Affiliation(s)
- Johnathon P Sheets
- Department of Food, Agricultural and Biological Engineering, The Ohio State University/Ohio Agricultural Research and Development Center, 1680 Madison Ave., Wooster, OH 44691-4096, USA
| | - Xumeng Ge
- Department of Food, Agricultural and Biological Engineering, The Ohio State University/Ohio Agricultural Research and Development Center, 1680 Madison Ave., Wooster, OH 44691-4096, USA
| | - Yebo Li
- Department of Food, Agricultural and Biological Engineering, The Ohio State University/Ohio Agricultural Research and Development Center, 1680 Madison Ave., Wooster, OH 44691-4096, USA.
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48
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Campuzano R, González-Martínez S. Extraction of soluble substances from organic solid municipal waste to increase methane production. BIORESOURCE TECHNOLOGY 2015; 178:247-253. [PMID: 25190296 DOI: 10.1016/j.biortech.2014.08.042] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2014] [Revised: 08/07/2014] [Accepted: 08/08/2014] [Indexed: 06/03/2023]
Abstract
This work deals with the analysis of the methane production from Mexico City's urban organic wastes after separating soluble from suspended substances. Water was used to extract soluble substances under three different water to waste ratios and after three extraction procedures. Methane production was measured at 35 °C during 21 days using a commercial methane potential testing device. Results indicate that volatile solids extraction increases with dilution rate to a maximum of 40% at 20 °C and to 43% at 93 °C. The extracts methane production increases with the dilution rate as a result of enhanced dissolved solids extraction. The combined (extract and bagasse) methane production reached, in 6 days, 66% of the total methane produced in 21 days. The highest methane production rates were measured during the first six days.
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Affiliation(s)
- Rosalinda Campuzano
- Environmental Engineering Department, Institute of Engineering, National University of Mexico (Universidad Nacional Autónoma de México), 04510 Mexico DF, Mexico.
| | - Simón González-Martínez
- Environmental Engineering Department, Institute of Engineering, National University of Mexico (Universidad Nacional Autónoma de México), 04510 Mexico DF, Mexico
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Fu SF, Wang F, Yuan XZ, Yang ZM, Luo SJ, Wang CS, Guo RB. The thermophilic (55°C) microaerobic pretreatment of corn straw for anaerobic digestion. BIORESOURCE TECHNOLOGY 2015; 175:203-8. [PMID: 25459823 DOI: 10.1016/j.biortech.2014.10.072] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2014] [Revised: 10/10/2014] [Accepted: 10/14/2014] [Indexed: 05/25/2023]
Abstract
Microaerobic process has been proven to be an alternative pretreatment for the anaerobic digestion (AD) process in several studies. In this study, the effect of thermophilic microaerobic pretreatment (TMP) on the AD of corn straw was investigated. Results indicated that TMP process obviously improved the methane yield. The maximum methane yield was obtained at the oxygen loads of 5ml/g VSsubstrate, which was 16.24% higher than that of untreated group. The modified first order equation analysis showed the TMP process not only accelerated the hydrolysis rates but also reduced the lag-phase time of AD process. The structural characterization analysis showed cellulosic structures of corn straw were partly disrupted during TMP process. The crystallinity indexes were also decreased. In addition, large or destroyed pores and substantial structural disruption were observed after pretreatment. The results showed that TMP is an efficient pretreatment method for the AD of corn straw.
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Affiliation(s)
- Shan-Fei Fu
- Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong Province 266101, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Fei Wang
- Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong Province 266101, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Xian-Zheng Yuan
- Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong Province 266101, PR China
| | - Zhi-Man Yang
- Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong Province 266101, PR China
| | - Sheng-Jun Luo
- Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong Province 266101, PR China
| | - Chuan-Shui Wang
- Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong Province 266101, PR China
| | - Rong-Bo Guo
- Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong Province 266101, PR China.
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Peces M, Astals S, Mata-Alvarez J. Assessing total and volatile solids in municipal solid waste samples. ENVIRONMENTAL TECHNOLOGY 2014; 35:3041-3046. [PMID: 25244131 DOI: 10.1080/09593330.2014.929182] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Municipal solid waste is broadly generated in everyday activities and its treatment is a global challenge. Total solids (TS) and volatile solids (VS) are typical control parameters measured in biological treatments. In this study, the TS and VS were determined using the standard methods, as well as introducing some variants: (i) the drying temperature for the TS assays was 105°C, 70°C and 50°C and (ii) the VS were determined using different heating ramps from room tempature to 550°C. TS could be determined at either 105°C or 70°C, but oven residence time was tripled at 70°C, increasing from 48 to 144 h. The VS could be determined by smouldering the sample (where the sample is burnt without a flame), which avoids the release of fumes and odours in the laboratory. However, smouldering can generate undesired pyrolysis products as a consequence of carbonization, which leads to VS being underestimated. Carbonization can be avoided using slow heating ramps to prevent the oxygen limitation. Furthermore, crushing the sample cores decreased the time to reach constant weight and decreased the potential to underestimate VS.
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Affiliation(s)
- M Peces
- a Department of Chemical Engineering , University of Barcelona , C/Martíi Franquès, 1, 6th floor, 08028 Barcelona , Spain
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