1
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Zhang X, Ma L, Zhang XX. Neglected risks of enhanced antimicrobial resistance and pathogenicity in anaerobic digestion during transition from thermophilic to mesophilic. JOURNAL OF HAZARDOUS MATERIALS 2024; 475:134886. [PMID: 38878435 DOI: 10.1016/j.jhazmat.2024.134886] [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: 02/09/2024] [Revised: 06/05/2024] [Accepted: 06/10/2024] [Indexed: 06/27/2024]
Abstract
Minimization of antibiotic resistance genes (ARGs) and potential pathogenic antibiotic-resistant bacteria (PARB) during anaerobic digestion (AD) is significantly impacted by temperature. However, knowledge on how ARGs and PARB respond to temperature transition from thermophilic to mesophilic is limited. Here, we combined metagenomic-based with culture-based approaches and revealed the risks of antimicrobial resistance and pathogenicity during transition from 55 °C to 35 °C for AD, with strategies of sharp (ST, one-step by 20 °C/d) and mild (MT, step-wise by 1 °C/d). Results indicated a lower decrease in methane production with MT (by 38.9%) than ST (by 88.8%). Phenotypic assays characterized a significant propagation of multi-resistant lactose-fermenting Enterobacteriaceae and indicator pathogens after both transitions, especially via ST. Further genomic evidence indicated a significant increase of ARGs (29.4-fold), virulence factor genes (1.8-fold) and PARB (65.3-fold) after ST, while slight enrichment via MT. Bacterial succession and enhanced horizontal transfer mediated by mobile genetic elements promoted ARG propagation in AD during transition, which was synchronously exacerbated through horizontal transfer mechanisms mediated by cellular physiological responses (oxidative stress, membrane permeability, bacterial conjugation and transformation) and co-selection mechanisms of biomethanation metabolic functions (acidogenesis and acetogenesis). This study reveals temperature-dependent resistome and pathogenicity development in AD, facilitating microbial risk control.
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Affiliation(s)
- Xingxing Zhang
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, PR China
| | - Liping Ma
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, PR China; Technology Innovation Center for Land Spatial Eco-restoration in Metropolitan Area, Ministry of Natural Resources, Shanghai 200062, PR China.
| | - Xu-Xiang Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China
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2
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Habchi S, Pecha J, Šánek L, Karouach F, El Bari H. Sustainable valorization of slaughterhouse waste through anaerobic digestion: A circular economy perspective. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 366:121920. [PMID: 39029174 DOI: 10.1016/j.jenvman.2024.121920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2024] [Revised: 06/03/2024] [Accepted: 07/15/2024] [Indexed: 07/21/2024]
Abstract
Slaughterhouse waste (SHW) poses significant environmental challenges due to its complex composition. In response, a novel review exploration of anaerobic digestion (AD) as a means of valorising SHW within the context of the circular economy (CE) is presented. The physicochemical properties of individual SHW, representing key parameters for the correct management of the AD process, are scrutinized. These parameters are further connected with identifying suitable pretreatment methods to enhance biogas production. Subsequently, the review examines the diverse technologies employed in the AD of SHW, considering the complexities of mono- or co-digestion. Various AD systems are evaluated for their effectiveness in harnessing the substantial biogas production potential from SHW, encompassing key parameters, reactor configurations, and operational conditions that influence the AD process. Moreover, the review interestingly extends its scope to the recovery and management of digestate, the by-product of AD. Along with the digestate composition, strategies for various utilization of this by-product are discussed. This investigation thus underscores, within the principles of the CE, the dual sustainable benefits of SHW processing via AD in biogas production and utilization of the resultant nutrient-rich digestate in various sectors.
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Affiliation(s)
- Sanae Habchi
- Laboratory of Electronic Systems, Information Processing, Mechanics and Energetics, Faculty of Sciences, Ibn Tofail University, Kenitra, Morocco.
| | - Jiří Pecha
- Tomas Bata University in Zlin, Faculty of Applied Informatics, Nad Stranemi 4511, 760 05, Zlin, Czech Republic
| | - Lubomír Šánek
- Tomas Bata University in Zlin, Faculty of Applied Informatics, Nad Stranemi 4511, 760 05, Zlin, Czech Republic
| | - Fadoua Karouach
- African Sustainable Agriculture Research (ASARI), University Mohammed VI Polytechnic (UM6P), Laâyoune, Morocco
| | - Hassan El Bari
- Laboratory of Electronic Systems, Information Processing, Mechanics and Energetics, Faculty of Sciences, Ibn Tofail University, Kenitra, Morocco
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3
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S R, Sabumon PC. A critical review on slaughterhouse waste management and framing sustainable practices in managing slaughterhouse waste in India. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 327:116823. [PMID: 36455438 DOI: 10.1016/j.jenvman.2022.116823] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Revised: 10/29/2022] [Accepted: 11/16/2022] [Indexed: 06/17/2023]
Abstract
Global meat consumption is on a rise with around 253 million metric tons of meat produced globally in the year 2020. Because of the rise in population and change in food preferences, meat consumption trend is likely to continue. Meat production by animal slaughtering increases the slaughterhouse wastes in the form of both solid and liquid wastes. Although various technologies for slaughterhouse waste management are available in developed countries, the effective utilization of slaughterhouse waste management is still missing in developing countries like India. India plays an active role in the meat export business globally and stood 2nd in the world with a total export valuation of 2.89 billion US $ in the year 2020. In this context, this study presents a critical overview of the current technological advancements in the global slaughterhouse waste management including utilization of by-products and further, the prevailing slaughterhouse waste management of India is discussed. Finally, a sustainable slaughterhouse waste management strategy emphasizing circular economy and regulations improvements have been suggested for India to compete in this sector at global scale.
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Affiliation(s)
- Ragasri S
- School of Civil Engineering, Vellore Institute of Technology, Chennai Campus, Chennai, 600127, India
| | - P C Sabumon
- School of Civil Engineering, Vellore Institute of Technology, Chennai Campus, Chennai, 600127, India.
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4
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Sfetsas T, Patsatzis S, Chioti A, Kopteropoulos A, Dimitropoulou G, Tsioni V, Kotsopoulos T. A review of advances in valorization and post-treatment of anaerobic digestion liquid fraction effluent. WASTE MANAGEMENT & RESEARCH : THE JOURNAL OF THE INTERNATIONAL SOLID WASTES AND PUBLIC CLEANSING ASSOCIATION, ISWA 2022; 40:1093-1109. [PMID: 35057678 DOI: 10.1177/0734242x211073000] [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] [Indexed: 06/14/2023]
Abstract
Traditionally, digestate is considered a waste, which is used as fertiliser in the agriculture industry. Recent studies focus on increasing the profitability of digestate by extracting reusable nutrients to promote biogas plants cost-effectiveness, sustainable management and circular economy. This review focuses on the post-treatment and valorization of liquor which is produced by solid-liquid fractioning of digestate. Nutrient recovery and removal from liquor are possible through mechanical, physicochemical and biological procedures. The processes discussed involve complex procedures that differ in economic value, feasibility, legislative restrictions and performance. The parameters that should be considered to employ these techniques are influenced by liquor characteristics, topography, climate conditions and available resources. These are key parameters to keep in mind during designing and manufacturing a biogas plant. In the following chapters, a discussion on available liquor treatment methods takes place. The present study examines the critical aspects of the available liquor treatment methods.
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Affiliation(s)
- Themistoklis Sfetsas
- Research & Development, Quality Control and Testing Services, QLAB Private Company, Thessaloniki, Greece
| | - Stefanos Patsatzis
- Research & Development, Quality Control and Testing Services, QLAB Private Company, Thessaloniki, Greece
| | - Afroditi Chioti
- Research & Development, Quality Control and Testing Services, QLAB Private Company, Thessaloniki, Greece
| | - Alexandros Kopteropoulos
- Research & Development, Quality Control and Testing Services, QLAB Private Company, Thessaloniki, Greece
| | - Georgia Dimitropoulou
- Research & Development, Quality Control and Testing Services, QLAB Private Company, Thessaloniki, Greece
| | - Vasiliki Tsioni
- Research & Development, Quality Control and Testing Services, QLAB Private Company, Thessaloniki, Greece
| | - Thomas Kotsopoulos
- Faculty of Agriculture, Aristoteleio University of Thessaloniki, Thessaloniki, Greece
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Mozhiarasi V, Natarajan TS. Slaughterhouse and poultry wastes: management practices, feedstocks for renewable energy production, and recovery of value added products. BIOMASS CONVERSION AND BIOREFINERY 2022:1-24. [PMID: 35194536 PMCID: PMC8830992 DOI: 10.1007/s13399-022-02352-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Revised: 01/04/2022] [Accepted: 01/14/2022] [Indexed: 06/14/2023]
Abstract
The slaughterhouse and poultry industry is possibly one of the fastest-growing sectors driven by the increasing demand in food availability. Subsequently, the wastes produced from the slaughterhouse and poultry industry are in huge quantities, which could be a promising resource for the recovery of value added products, and bioenergy production to minimize the dependence on fossil fuels. Furthermore, the wastes from slaughterhouses and poultry are a hub of pathogens that is capable of infecting humans and animals. This demands the emerging need for an effective and safe disposal method to reduce the spread of diseases following animal slaughtering. In light of that, the state of the production of slaughterhouse and poultry wastes was presented at first. Following this, the impact of solid waste exposure in terms of air, water, and soil pollution and the associated health challenges due to improper solid waste management practices were presented to highlight the importance of the topic. Secondly, the potency of these solid wastes and the various waste-to-energy technologies that have been employed for effective management and resource utilization of wastes generated from slaughterhouses and poultry were reviewed in detail. Finally, this review also highlights the opportunities and challenges associated with effective solid waste management, future requirements for the development of effective technologies for the recovery of value added products (like keratin, fibreboards), and biofuel production.
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Affiliation(s)
- Velusamy Mozhiarasi
- CLRI Regional Centre, CSIR-Central Leather Research Institute (CSIR-CLRI), Punjab Jalandhar, 144021 India
| | - Thillai Sivakumar Natarajan
- Environmental Science Laboratory, CSIR-Central Leather Research Institute (CSIR-CLRI), Chennai, 600020 Tamil Nadu India
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6
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Determination of methane generation potential and evaluation of kinetic models in poultry wastes. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2021. [DOI: 10.1016/j.bcab.2021.101936] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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7
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Cremonez PA, Teleken JG, Weiser Meier TR, Alves HJ. Two-Stage anaerobic digestion in agroindustrial waste treatment: A review. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 281:111854. [PMID: 33360925 DOI: 10.1016/j.jenvman.2020.111854] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 12/12/2020] [Accepted: 12/13/2020] [Indexed: 06/12/2023]
Abstract
The anaerobic digestion is a process widely recognized as an interesting alternative for the treatment and stabilization of residual organic substrates. However, several technical limitations were observed based on the characteristics of the organic matter submitted to the process, such as the presence of high concentrations of soluble sugars or fats. The technology of anaerobic digestion in multiple stages is described as a viable option in the control of variables, optimizing the environmental conditions of the main microorganisms involved in the process, assuring high solid removal and methane production, besides allowing a higher energy yield through the generation of molecular fuel hydrogen. Several studies reviewed the process of anaerobic digestion in multiple stages in the treatment of food waste, although few report its use applied directly to agroindustrial residues. Thus, the present work aims to review the literature evaluating the scenario and viability of the multi-stage anaerobic digestion process applied to agroindustrial effluents. Effluents such as manipueira, vinasse, and dairy wastewater are substrates that present high yields when treated by AD processes with stage separation. The high concentration of easily fermentable sugars results in a high production of molecular hydrogen (co-product of the production of volatile acids in the acid phase) and methane (methanogenic phase). The great challenges related to the development of the sector are focused on the stability of the composition and yield of hydrogen in the acid phase, besides the problems resulting from the treatment of complex residues. Thus, the present study suggests that future works should focus on the technologies of new microorganisms and optimization of process parameters, providing maturation and scale-up of the two-stage anaerobic digestion technique.
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Affiliation(s)
- Paulo André Cremonez
- Federal University of Paraná (UFPR-Campus Palotina), 2153 Pioneiro St., Bairro Jardim Dallas, Palotina, PR, 85.950-000, Brazil.
| | - Joel Gustavo Teleken
- Federal University of Paraná (UFPR-Campus Palotina), 2153 Pioneiro St., Bairro Jardim Dallas, Palotina, PR, 85.950-000, Brazil
| | - Thompson Ricardo Weiser Meier
- Federal University of Paraná (UFPR-Campus Palotina), 2153 Pioneiro St., Bairro Jardim Dallas, Palotina, PR, 85.950-000, Brazil
| | - Helton José Alves
- Federal University of Paraná (UFPR-Campus Palotina), 2153 Pioneiro St., Bairro Jardim Dallas, Palotina, PR, 85.950-000, Brazil
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Elsamadony M, Mostafa A, Fujii M, Tawfik A, Pant D. Advances towards understanding long chain fatty acids-induced inhibition and overcoming strategies for efficient anaerobic digestion process. WATER RESEARCH 2021; 190:116732. [PMID: 33316662 DOI: 10.1016/j.watres.2020.116732] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 11/24/2020] [Accepted: 12/06/2020] [Indexed: 06/12/2023]
Abstract
The inhibition of the anaerobic digestion (AD) process, caused by long chain fatty acids (LCFAs), has been considered as an important issue in the wastewater treatment sector. Proper understanding of mechanisms behind the inhibition is a must for further improvements of the AD process in the presence of LCFAs. Through analyzing recent literature, this review extensively describes the mechanism of LCFAs degradation, during AD. Further, a particular focus was directed to the key parameters which could affect such process. Besides, this review highlights the recent research efforts in mitigating LCFAs-caused inhibition, through the addition of commonly used additives such as cations and natural adsorbents. Specifically, additives such as bentonite, cation-based adsorbents, as well as zeolite and other natural adsorbents for alleviating the LCFAs-induced inhibition are discussed in detail. Further, panoramic evaluations for characteristics, various mechanisms of reaction, merits, limits, recommended doses, and preferred conditions for each of the different additives are provided. Moreover, the potential for increasing the methane production via pretreatment using those additives are discussed. Finally, we provide future horizons for the alternative materials that can be utilized, more efficiently, for both mitigating LCFAs-based inhibition and boosting methane potential in the subsequent digestion of LCFA-related wastes.
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Affiliation(s)
- Mohamed Elsamadony
- Tokyo Institute of Technology, Civil and Environmental Engineering Department, Meguro-ku, Tokyo, 152-8552, Japan; Tanta University, Faculty of Engineering, Public Works Engineering Department, 31521, Tanta City, Egypt.
| | - Alsayed Mostafa
- Department of Smart City Engineering, Inha University, 100 Inharo, Nam-gu, Incheon 22212, South Korea
| | - Manabu Fujii
- Tokyo Institute of Technology, Civil and Environmental Engineering Department, Meguro-ku, Tokyo, 152-8552, Japan.
| | - Ahmed Tawfik
- National Research Centre, Water Pollution Research Department, Giza, 12622, Egypt
| | - Deepak Pant
- Separation & Conversion Technology, Flemish Institute for Technological Research (VITO), Boeretang 200, Mol 2400, Belgium
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9
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Sharma S, Basu S, Shetti NP, Kamali M, Walvekar P, Aminabhavi TM. Waste-to-energy nexus: A sustainable development. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 267:115501. [PMID: 32892013 DOI: 10.1016/j.envpol.2020.115501] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2020] [Revised: 08/01/2020] [Accepted: 08/20/2020] [Indexed: 06/11/2023]
Abstract
An upsurge in global population due to speedy urbanization and industrialization is facing significant challenges such as rising energy-demand, enormous waste-generation and environmental deterioration. The waste-to-energy nexus based on the 5R principle (Reduce, Reuse, Recycle, Recovery, and Restore) is of paramount importance in solving these Gordian knots. This review essentially concentrates on latest advancements in the field of 'simultaneous waste reduction and energy production' technologies. The waste-to-energy approaches (thermal and biochemical) for energy production from the agricultural residues are comprehensively discussed in terms environmental, techno-economic, and policy analysis. The review will assess the loopholes in order to come up with more sophisticated technologies that are not only eco-friendly and cost-effective, but also socially viable. The waste-to-energy nexus as a paradigm for sustainable development of restoring waste is critically discussed considering future advancement plans and agendas of the policy-makers.
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Affiliation(s)
- Surbhi Sharma
- School of Chemistry and Biochemistry, Thapar Institute of Engineering and Technology, Patiala, 147004, India
| | - Soumen Basu
- School of Chemistry and Biochemistry, Thapar Institute of Engineering and Technology, Patiala, 147004, India
| | - Nagaraj P Shetti
- Center for Electrochemical Science and Materials, Department of Chemistry, K.L.E. Institute of Technology, Hubballi, 580 027, Karnataka, India
| | - Mohammadreza Kamali
- KU Leuven, Department of Chemical Engineering, Process and Environmental Technology Lab, J. De Nayerlaan 5, 2860, Sint-Katelijne-Waver, Belgium
| | - Pavan Walvekar
- Department of Pharmaceutical Engineering, SET's College of Pharmacy, Dharwad, 580 002, Karnataka, India
| | - Tejraj M Aminabhavi
- Department of Pharmaceutical Engineering, SET's College of Pharmacy, Dharwad, 580 002, Karnataka, India.
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10
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Hailu AM, Asfaw SL, Tegaye TA. Effect of carbon-rich-waste addition as co-substrate on the performance and stability of anaerobic digestion of abattoir wastewater without agitation. BIORESOUR BIOPROCESS 2020. [DOI: 10.1186/s40643-020-00333-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
AbstractMultiple wastes’ co-digestion is one of the alternatives for improved anaerobic digestion (AD) process of industrial and municipal wastes. The present work investigated the influence of fruit–vegetable solid waste (FVW) addition as a co-substrate on the performance of AD of abattoir wastewater (AWW). The co-digestion was done at a lab-scale-based experiment under mesophilic condition using a two-phase anaerobic sequencing batch reactor without agitation. It was tested at different mixing ratios (100%AWW; 75%AWW:25%FVW; 50%AWW:50%FVW; 25%AWW:75%FVW; 100%FVW) with the intention of looking for the best mixing ratio with the best performance. It was fed on a semi-continuous basis and operated for 18 days (d) total retention time (HRT): 3 days for the acidogenesis reactor and 15 days for methanogenesis reactor. The addition of FVW enhanced biogas yield and VS removal by 70.26% and 57.11%, respectively, at optimum mixing ratio. Moreover, to some extent improvement of AD process stability verified by the decreased TVFA:TAlk ratio and free ammonia nitrogen was observed upon progressive addition of FVW. Finally, this co-digestion process should further be studied for its performance at different HRTs with agitation.
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11
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Hyperthermophilic Treatment of Grass and Leaves to Produce Hydrogen, Methane and VFA-Rich Digestate: Preliminary Results. ENERGIES 2020. [DOI: 10.3390/en13112814] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In this study, the feasibility of hydrogen and methane production from grass and leaves via hyperthermophilic anaerobic digestion was investigated. The hyperthermophilic treatment of grass at 70 °C resulted in the highest concentrations of volatile fatty acids (TVFA) and reducing sugars in the supernatant of over 21 and 6.5 g/L reported on day 3 and 4 of the experiment. In contrast, hydrolysis and acidification of leaves performed slower and with lower efficiency, as the peak concentrations of TVFA and reducing sugars were observed at the end of the process. However, the highest cumulative hydrogen and methane yields of 69.64 mLH2/gVS and 38.63 mLCH4/gVS were reported for leaves digested at 70 °C, whereas the corresponding maximum productions observed for grass were 50 mLH2/gVS and 1.98 mLCH4/gVS, respectively. A temperature increase to 80 °C hampered hydrogen and methane production and also resulted in lower yields of volatile fatty acids, reducing sugars and ammonia as compared to the corresponding values reported for 70 °C.
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12
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Usman M, Zha L, Abomohra AEF, Li X, Zhang C, Salama ES. Evaluation of animal- and plant-based lipidic waste in anaerobic digestion: kinetics of long-chain fatty acids degradation. Crit Rev Biotechnol 2020; 40:733-749. [DOI: 10.1080/07388551.2020.1756215] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Muhammad Usman
- School of Life Sciences, Lanzhou University, Lanzhou, China
- Key Laboratory of Cell Activities and Stress Adaptations, Ministry of Education, Lanzhou University, Lanzhou, Gansu Province, China
| | - Lajia Zha
- School of Life Sciences, Lanzhou University, Lanzhou, China
- Key Laboratory of Cell Activities and Stress Adaptations, Ministry of Education, Lanzhou University, Lanzhou, Gansu Province, China
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, Lanzhou University, Lanzhou, Gansu Province, China
| | - Abd El-Fatah Abomohra
- New Energy Department, School of Energy and Power Engineering, Jiangsu University, Jiangsu Province, China
- Botany Department, Faculty of Science, Tanta University, Tanta, Egypt
| | - Xiangkai Li
- School of Life Sciences, Lanzhou University, Lanzhou, China
- Key Laboratory of Cell Activities and Stress Adaptations, Ministry of Education, Lanzhou University, Lanzhou, Gansu Province, China
| | - Chunjiang Zhang
- School of Life Sciences, Lanzhou University, Lanzhou, China
- Key Laboratory of Cell Activities and Stress Adaptations, Ministry of Education, Lanzhou University, Lanzhou, Gansu Province, China
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, Lanzhou University, Lanzhou, Gansu Province, China
| | - El-Sayed Salama
- Department of Occupational and Environmental Health, School of Public Health, Lanzhou University, Lanzhou, Gansu Province, China
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Massalha N, Plewa MJ, Nguyen TH, Dong S. Influence of Anaerobic Mesophilic and Thermophilic Digestion on Cytotoxicity of Swine Wastewaters. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:3032-3038. [PMID: 31971377 DOI: 10.1021/acs.est.9b07066] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Recycling wastewater from animal production for fertilizers using anaerobic digestion (AD) is a common method to recover the nutrients in the digestate. However, the digestate toxicity is not well understood because AD is mainly designed for chemical oxygen demand reduction. This study determined the toxicity during AD and the controlling factors with the goal to improve digestate safety during farmer handling to reuse the nutrients. Thermophilic and mesophilic AD of two swine wastewater sources were studied. Mammalian cell cytotoxicity revealed that the effluent after thermophilic digestion was at least 69% more toxic than the mesophilic effluent, owing to higher ammonia and total organic carbon in the former. Ammonia accounted for >55% total cytotoxicity, and the organics of the thermophilic digestate were twice more toxic than those in the mesophilic digestate. Despite less toxicity contribution than the ammonia, the organics did demonstrate significant adverse effects on the thiol-mediated cellular protection mechanism. For swine wastewater nutrient recovery, converting ammonia to less toxic nitrogen forms could lower the toxic hazard of the AD digestate. With much less ammonia, the organics would be the remaining decisive factor for toxicity, which is favorably reduced using thermophilic AD over mesophilic. If the ammonia is not reduced, mesophilic AD would generate a less toxic digestate.
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Affiliation(s)
- Nedal Massalha
- The Galilee Society Institute of Applied Research, University of Haifa, P.O. Box 437, Shefa-Amr 20200, Israel
- Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
- Safe Global Water Institute, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Michael J Plewa
- Department of Crop Sciences, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
- Safe Global Water Institute, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Thanh H Nguyen
- Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Shengkun Dong
- Guangdong Engineering Technology Research Center of Water Security Regulation and Control for Southern China, Key Laboratory of Water Cycle and Water Security in Southern China of Guangdong Higher Education Institute, School of Civil Engineering, Sun Yat-sen University, Guangzhou, Guangdong 510275, China
- Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
- Safe Global Water Institute, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
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14
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Performance and Microbial Community Structure of Anaerobic Membrane Bioreactor for Lipids-Rich Kitchen Waste Slurry Treatment: Mesophilic and Thermophilic Processes. Processes (Basel) 2019. [DOI: 10.3390/pr7120879] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
The performance and microbial community structure for treating lipids-rich kitchen waste slurry in mesophilic Anaerobic Membrane Bioreactor (m-AnMBR) and thermophilic AnMBR (t-AnMBR) were compared in this study. Higher Organic Loading Rate (OLR) of 12 kg-COD/(m3·d), better Chemical Oxygen Demand (COD) removal efficiency over 98%, stronger stability with Volatile Fatty Acids (VFAs)/alkalinity below 0.04, higher flux with 18 L/(m2·h) and lower Long Chain Fatty Acids (LCFAs) concentration of 550 mg/L were obtained in the m-AnMBR. Directly increasing temperature from 39 to 55 °C resulted in a collapse of the t-AnMBR. Acclimation via gradually increasing temperature made the t-AnMBR run successfully with lower OLR and COD removal efficiency of 7.5 kg-COD/(m3·d) and 96%. An obvious discrepancy of microbial community structure was presented between the m-AnMBR and t-AnMBR via the 16S rRNA gene sequence analysis. The Methanomethylovorans and Methanoculleus were dominant in the t-AnMBR instead of Methanobacterium and Methanothrix in the m-AnMBR.
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15
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Omondi EA, Ndiba PK, Njuru PG. Characterization of water hyacinth (E. crassipes) from Lake Victoria and ruminal slaughterhouse waste as co-substrates in biogas production. SN APPLIED SCIENCES 2019. [DOI: 10.1007/s42452-019-0871-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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16
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Ning Z, Zhang H, Li W, Zhang R, Liu G, Chen C. Anaerobic digestion of lipid-rich swine slaughterhouse waste: Methane production performance, long-chain fatty acids profile and predominant microorganisms. BIORESOURCE TECHNOLOGY 2018; 269:426-433. [PMID: 30268045 DOI: 10.1016/j.biortech.2018.08.001] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Revised: 07/31/2018] [Accepted: 08/01/2018] [Indexed: 05/25/2023]
Abstract
This study investigated methane production, long-chain fatty acids (LCFAs) profile, and predominant microorganisms in anaerobic digestion (AD) of lipid-rich swine slaughterhouse waste (SSW). The maximum methane yield was 999.2 mL/g VS. LCFAs, as inhibitory hydrolysis products, accumulated first to 1165 mg/L on day 3, and then decreased sharply to 125.7 mg/L on day 9, and finally were degraded to 20 mg/L on day 27. Linoleic acid (C18:2), oleic acid (C18:1) and palmitic acid (C16:0) were the dominant LCFAs. The easy conversion of C18:1 to C16:0 compared with difficult degradation of C16:0 resulted in an increase of C16:0 on day 4-6. Predominant microorganisms were Clostridium, Syntrophomonas and Methanospirillum. This study proved the high methane potential of lipid-rich SSW and gained insights into the degradation process by analysis of intermediates of LCFAs and predominant microorganisms. The results can provide valuable guidance for efficient utilization of this waste to produce methane in future.
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Affiliation(s)
- Zhifang Ning
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Han Zhang
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Wanwu Li
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Ruihong Zhang
- Department of Biological & Agricultural Engineering, University of California, Davis, CA 95616, United States
| | - Guangqing Liu
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Chang Chen
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
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17
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Guo X, Kang K, Shang G, Yu X, Qiu L, Sun G. Influence of mesophilic and thermophilic conditions on the anaerobic digestion of food waste: Focus on the microbial activity and removal of long chain fatty acids. WASTE MANAGEMENT & RESEARCH : THE JOURNAL OF THE INTERNATIONAL SOLID WASTES AND PUBLIC CLEANSING ASSOCIATION, ISWA 2018; 36:1106-1112. [PMID: 30306837 DOI: 10.1177/0734242x18801195] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The mesophilic reactor (MR) exhibited advantages in biogas production and performance stability over thermophilic reactor (TR) during the long-term anaerobic digestion (AD) of food waste (FW) with stepwise organic loading rate elevating. It was interesting to explore the mechanism causing the divergences in performances between these two reactors. The microbial activity was compared on day 110 when TR began to deteriorate. The results show that MR had significantly higher specific acetoclastic methanogenic activities (SAMA) and specific propionate and butyrate oxidative activities (SPOA and SBOA) than TR. The SAMA, SPOA and SBOA in TR were only 50.3%, 18.6% and 46.4% of those values in MR, respectively. Remarkably, the specific hydrogenotrophic methanogenic activity of 15.5±2.1, 15.7±4.6 mmol CH4·L-1 original slurry·d-1 in MR and TR was comparative with insignificant difference, which indicates that the microbial activity in TR had been inhibited widely apart from the hydrogenotrophic methanogenesis. Additionally, many particles with the diameters of 1-2 mm were observed to form in MR and identified as complexes of calcium and long chain fatty acids (LCFAs). The formation of calcium crystallization might alleviate the inhibition of LCFAs during AD of FW, which further supports the better performance in MR than TR.
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Affiliation(s)
- Xiaohui Guo
- 1 College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Shaanxi, People's Republic of China
- 2 The West Scientific Observing and Experimental Station of Rural Renewable Energy Exploitation and Utilization of the Ministry of Agriculture, Yangling, Shaanxi, People's Republic of China
| | - Kang Kang
- 1 College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Shaanxi, People's Republic of China
- 2 The West Scientific Observing and Experimental Station of Rural Renewable Energy Exploitation and Utilization of the Ministry of Agriculture, Yangling, Shaanxi, People's Republic of China
| | - Gaoyuan Shang
- 1 College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Shaanxi, People's Republic of China
- 2 The West Scientific Observing and Experimental Station of Rural Renewable Energy Exploitation and Utilization of the Ministry of Agriculture, Yangling, Shaanxi, People's Republic of China
| | - Xiunan Yu
- 1 College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Shaanxi, People's Republic of China
- 2 The West Scientific Observing and Experimental Station of Rural Renewable Energy Exploitation and Utilization of the Ministry of Agriculture, Yangling, Shaanxi, People's Republic of China
| | - Ling Qiu
- 1 College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Shaanxi, People's Republic of China
- 2 The West Scientific Observing and Experimental Station of Rural Renewable Energy Exploitation and Utilization of the Ministry of Agriculture, Yangling, Shaanxi, People's Republic of China
| | - Guotao Sun
- 1 College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Shaanxi, People's Republic of China
- 2 The West Scientific Observing and Experimental Station of Rural Renewable Energy Exploitation and Utilization of the Ministry of Agriculture, Yangling, Shaanxi, People's Republic of China
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18
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Kirby ME, Theodorou MK, Brizuela CM, Huntington JA, Powles J, Wilkinson RG. The anaerobic digestion of pig carcase with or without sugar beet pulp, as a novel on-farm disposal method. WASTE MANAGEMENT (NEW YORK, N.Y.) 2018; 75:251-260. [PMID: 29459204 DOI: 10.1016/j.wasman.2018.02.022] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Revised: 02/07/2018] [Accepted: 02/12/2018] [Indexed: 06/08/2023]
Abstract
Anaerobic digestion was investigated as a potential method for on-farm disposal of fallen stock (pig carcases), degrading the carcase material to produce biogas and digestate. The effects of feedstock (sugar beet pulp or pig carcase material or a 50:50 mix) and organic loading rate (50 g-TS L-1 or 100 g-TS L-1), during mesophilic (35 °C) anaerobic digestion were investigated. Anaerobic digestion was achieved for all experimental treatments, however the pig carcase material at the higher organic loading rate produced the second highest methane yield (0.56 Nm3 kg-VS-1 versus a range of 0.14-0.58 Nm3 kg-VS-1 for other treatments), with the highest percentage of methane in total biogas (61.6% versus a range of 36.1-55.2% for all other treatments). Satisfactory pathogen reduction is a legislative requirement for disposal of carcase material. Pathogens were quantified throughout the anaerobic digestion process. Enterococcus faecalis concentrations decreased to negligible levels (2.8 log10 CFU g-TS-1), whilst Clostridium perfringens levels remained unaffected by treatment throughout the digestion process (5.3 ± 0.2 log10 CFU g-TS-1).
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Affiliation(s)
- Marie E Kirby
- Animal Production, Welfare and Veterinary Sciences, Harper Adams University, Newport, Shropshire TF10 8NB, United Kingdom.
| | - Michael K Theodorou
- Animal Production, Welfare and Veterinary Sciences, Harper Adams University, Newport, Shropshire TF10 8NB, United Kingdom
| | - Carole M Brizuela
- Animal Production, Welfare and Veterinary Sciences, Harper Adams University, Newport, Shropshire TF10 8NB, United Kingdom
| | - James A Huntington
- Animal Production, Welfare and Veterinary Sciences, Harper Adams University, Newport, Shropshire TF10 8NB, United Kingdom
| | - Jayne Powles
- Animal Production, Welfare and Veterinary Sciences, Harper Adams University, Newport, Shropshire TF10 8NB, United Kingdom
| | - Robert G Wilkinson
- Animal Production, Welfare and Veterinary Sciences, Harper Adams University, Newport, Shropshire TF10 8NB, United Kingdom
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19
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New concepts in anaerobic digestion processes: recent advances and biological aspects. Appl Microbiol Biotechnol 2018; 102:5065-5076. [DOI: 10.1007/s00253-018-9039-9] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Revised: 04/16/2018] [Accepted: 04/16/2018] [Indexed: 10/17/2022]
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20
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Digestion Performance and Microbial Metabolic Mechanism in Thermophilic and Mesophilic Anaerobic Digesters Exposed to Elevated Loadings of Organic Fraction of Municipal Solid Waste. ENERGIES 2018. [DOI: 10.3390/en11040952] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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21
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Pagés-Díaz J, Pereda-Reyes I, Sanz JL, Lundin M, Taherzadeh MJ, Horváth IS. A comparison of process performance during the anaerobic mono- and co-digestion of slaughterhouse waste through different operational modes. J Environ Sci (China) 2018; 64:149-156. [PMID: 29478634 DOI: 10.1016/j.jes.2017.06.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2016] [Revised: 02/06/2017] [Accepted: 06/05/2017] [Indexed: 06/08/2023]
Abstract
The use of consecutive feeding was applied to investigate the response of the microbial biomass to a second addition of substrates in terms of biodegradation using batch tests as a promising alternative to predict the behavior of the process. Anaerobic digestion (AD) of the slaughterhouse waste (SB) and its co-digestion with manure (M), various crops (VC), and municipal solid waste were evaluated. The results were then correlated to previous findings obtained by the authors for similar mixtures in batch and semi-continuous operation modes. AD of the SB failed showing total inhibition after a second feeding. Co-digestion of the SB+M showed a significant improvement for all of the response variables investigated after the second feeding, while co-digestion of the SB+VC resulted in a decline in all of these response variables. Similar patterns were previously detected, during both the batch and the semi-continuous modes.
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Affiliation(s)
- Jhosané Pagés-Díaz
- Process Engineering Centre (CIPRO), Universidad Tecnológica de La Habana "José Antonio Echeverría" (Technical University of Havana "José A. Echeverría"), (Cujae), Marianao, La Habana, Cuba; Swedish Centre for Resource Recovery, University of Borås, 501 90 Borås, Sweden.
| | - Ileana Pereda-Reyes
- Process Engineering Centre (CIPRO), Universidad Tecnológica de La Habana "José Antonio Echeverría" (Technical University of Havana "José A. Echeverría"), (Cujae), Marianao, La Habana, Cuba.
| | - Jose Luis Sanz
- Department of Molecular Biology, Autonomous University of Madrid, 28049 Madrid, Spain
| | - Magnus Lundin
- Swedish Centre for Resource Recovery, University of Borås, 501 90 Borås, Sweden
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22
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Wang P, Wang H, Qiu Y, Ren L, Jiang B. Microbial characteristics in anaerobic digestion process of food waste for methane production-A review. BIORESOURCE TECHNOLOGY 2018; 248:29-36. [PMID: 28779951 DOI: 10.1016/j.biortech.2017.06.152] [Citation(s) in RCA: 178] [Impact Index Per Article: 29.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2017] [Revised: 06/26/2017] [Accepted: 06/27/2017] [Indexed: 06/07/2023]
Abstract
Food waste (FW) is rich in starch, fat, protein and cellulose. It is easy to decay and brings environmental pollution and other social problems. FW shows a high potential to produce methane by anaerobic digestion (AD) due to its high organic content. However, many inhibitors, such as accumulation of ammonia and volatile fatty acids (VFAs), usually result in inefficient performances and even process failure. Microorganisms play an important role in the process of hydrolysis, acidogenesis, acetogenesis and methanogenesis. This review provided a critical summary of microbial characteristics to obtain connects of microbial community structure with operational conditions at various states of AD, such as mesophilic and thermophilic, wet and dry, success and failure, pretreated or not, lab-scale and full-scale. This article emphasizes that it is necessary to analyze changes and mechanisms of microbial communities in unbalanced system and seek efficiency dynamic succession rules of the dominant microorganisms.
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Affiliation(s)
- Pan Wang
- School of Food and Chemical Engineering, Beijing Technology and Business University, Beijing 100048, China
| | - Hongtao Wang
- School of Environment, Tsinghua University, Beijing 100084, China
| | - Yinquan Qiu
- School of Food and Chemical Engineering, Beijing Technology and Business University, Beijing 100048, China
| | - Lianhai Ren
- School of Food and Chemical Engineering, Beijing Technology and Business University, Beijing 100048, China.
| | - Bin Jiang
- China Cleaner Production Center of Light Industry, Beijing 100012, China
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23
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Rodríguez-Abalde Á, Flotats X, Fernández B. Optimization of the anaerobic co-digestion of pasteurized slaughterhouse waste, pig slurry and glycerine. WASTE MANAGEMENT (NEW YORK, N.Y.) 2017; 61:521-528. [PMID: 28024897 DOI: 10.1016/j.wasman.2016.12.022] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2016] [Revised: 11/29/2016] [Accepted: 12/15/2016] [Indexed: 06/06/2023]
Abstract
The feasibility of co-digestion of blends of two different animal by-products (pig manure and pasteurized slaughterhouse waste) and recovered glycerine was studied in mesophilic conditions. Experiments were performed in a lab-scale CSTR along 490days, with a hydraulic retention time of 21-33days and with a step-wise increased organic loading rate, by adding and/or changing the wastes ratio, from 0.8 to 3.2kgCODm-3d-1. The best methane production rate (0.64Nm3CH4m-3d-1) represented an increment of 2.9-fold the initial one (0.22Nm3CH4m-3d-1 with pig manure solely). It was attained with a ternary mixture composed, in terms of inlet volatile solids, by 35% pig slurry, 47% pasteurized slaughterhouse waste and 18% glycerine. This blend was obtained through a stepwise C/N adjustment: this strategy led to a more balanced biodegradation due to unstressed bacterial populations through the performance, showed by the VFA-related indicators. Besides this, an improved methane yield (+153%) and an organic matter removal efficiency (+83%), regarding the digestion of solely pig slurry, were attained when the C/N ratio was adjusted to 10.3.
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Affiliation(s)
- Ángela Rodríguez-Abalde
- IRTA, GIRO Joint Research Unit IRTA-UPC, Torre Marimon, E-08140, Caldes de Montbui, Barcelona, Spain; EnergyLab, Edificio CITEXVI - Local 1, Fonte das Abelleiras, s/n, Campus Universitario de Vigo, E-36310 Vigo, Spain
| | - Xavier Flotats
- GIRO Joint Research Unit IRTA-UPC, Department of Agrifood Engineering and Biotechnology, Universitat Politècnica de Catalunya - BarcelonaTECH, Parc Mediterrani de la Tecnologia, Building D-4, E-08860, Castelldefels, Barcelona, Spain
| | - Belén Fernández
- IRTA, GIRO Joint Research Unit IRTA-UPC, Torre Marimon, E-08140, Caldes de Montbui, Barcelona, Spain.
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24
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Akhiar A, Battimelli A, Torrijos M, Carrere H. Comprehensive characterization of the liquid fraction of digestates from full-scale anaerobic co-digestion. WASTE MANAGEMENT (NEW YORK, N.Y.) 2017; 59:118-128. [PMID: 27847231 DOI: 10.1016/j.wasman.2016.11.005] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2016] [Revised: 10/21/2016] [Accepted: 11/03/2016] [Indexed: 05/24/2023]
Abstract
Waste management by anaerobic digestion generates a final byproduct, the digestate, which is usually separated into solid and liquid fractions to reduce the volume for transportation. The composition of the solid fraction has been recently studied to allow its valorization. However, full composition of liquid fraction of digestate and its size fractionation are less considered in the literature for efficient post treatment and valorization purposes. Therefore, here we characterized in detail liquid fraction of digestate obtained after solid-liquid separation from 11 full-scale co-digestion plants. The liquid fraction has a high concentration in organic matter with Chemical Oxygen Demand (COD) from 9.2 to 78g/L with 60-96% of COD in suspended particles (>1.2μm), 2-27% in colloids (1.2μm to 1kDa) and 2-18% in dissolved matter (<1kDa). Besides, it contained from 1.5 to 6.5g/L total nitrogen and high ions concentrations (0.5-3.1g/L NH4+, 1.05-5.48g/L K+, 0-2.13g/L PO43-). In addition, liquid fraction of digestate has poor biodegradability due to presence of humic substances making aerobic treatment inefficient. Only physico-chemical post treatment can be proposed for organic matter removal.
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Affiliation(s)
- Afifi Akhiar
- LBE, INRA, 102 Avenue des Etangs, Narbonne F-11100, France
| | | | | | - Helene Carrere
- LBE, INRA, 102 Avenue des Etangs, Narbonne F-11100, France
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25
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Ware A, Power N. What is the effect of mandatory pasteurisation on the biogas transformation of solid slaughterhouse wastes? WASTE MANAGEMENT (NEW YORK, N.Y.) 2016; 48:503-512. [PMID: 26494021 DOI: 10.1016/j.wasman.2015.10.013] [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: 04/29/2015] [Revised: 10/08/2015] [Accepted: 10/09/2015] [Indexed: 06/05/2023]
Abstract
The effect of mandatory pasteurisation on Category 3 offals, according to the Animal By-Products Regulation (ABPR 1069/2009/EC), was determined using Biochemical Methane Potential (BMP) assays as well as kinetic and statistical analysis. Pasteurised and unpasteurised offals sampled from cattle, pig and chicken slaughterhouses were characterised and their specific methane yields (SMYs) and their bioavailability was assessed. The resultant SMYs were high (465-650mLCH4gVS(-1)) with no statistically significant increase in methane production identified due to pasteurisation. However, the kinetics of the biogas transformation processes highlighted increased bioavailability of the organics due to pasteurisation. This was brought to light by the change in maximum daily SMY from day 22 to day 1 for the cattle offal (p=0.001), day 17 to day 1 for chicken offal (p=0.025) and an increase of 18.8% in the maximum daily SMY of the pig offal on day 1 (p=0.003). The increased bioavailability of the offals manifested itself in two ways with the determining factor being identified as the physical characteristics of the fats i.e. particle size. Firstly reducing the hydrolytic lag phase for the cattle offal, λ=7.46-1.52days (p=0.013). Secondly, causing increased accumulation of Long Chain Fatty Acids to acute inhibitory levels in the chicken and pig offal indicated by increased lag phases λ=5.05-21.91days (p=0.012), λ=15.54-23.04days (p=0.007) respectively.
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Affiliation(s)
- Aidan Ware
- Department of Civil, Structural and Environmental Engineering, Cork Institute of Technology, Cork, Ireland
| | - Niamh Power
- Department of Civil, Structural and Environmental Engineering, Cork Institute of Technology, Cork, Ireland.
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26
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Carrere H, Antonopoulou G, Affes R, Passos F, Battimelli A, Lyberatos G, Ferrer I. Review of feedstock pretreatment strategies for improved anaerobic digestion: From lab-scale research to full-scale application. BIORESOURCE TECHNOLOGY 2016; 199:386-397. [PMID: 26384658 DOI: 10.1016/j.biortech.2015.09.007] [Citation(s) in RCA: 214] [Impact Index Per Article: 26.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Revised: 09/04/2015] [Accepted: 09/05/2015] [Indexed: 05/12/2023]
Abstract
When properly designed, pretreatments may enhance the methane potential and/or anaerobic digestion rate, improving digester performance. This paper aims at providing some guidelines on the most appropriate pretreatments for the main feedstocks of biogas plants. Waste activated sludge was firstly investigated and implemented at full-scale, its thermal pretreatment with steam explosion being most recommended as it increases the methane potential and digestion rate, ensures sludge sanitation and the heat needed is produced on-site. Regarding fatty residues, saponification is preferred for enhancing their solubilisation and bioavailability. In the case of animal by-products, this pretreatment can be optimised to ensure sterilisation, solubilisation and to reduce inhibition linked to long chain fatty acids. With regards to lignocellulosic biomass, the first goal should be delignification, followed by hemicellulose and cellulose hydrolysis, alkali or biological (fungi) pretreatments being most promising. As far as microalgae are concerned, thermal pretreatment seems the most promising technique so far.
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Affiliation(s)
- Hélène Carrere
- INRA, UR0050, Laboratoire de Biotechnologie de l'Environnement, Avenue des Etangs, 11 100 Narbonne, France.
| | - Georgia Antonopoulou
- Institute of Chemical Engineering Sciences, Stadiou, Platani, GR 26504 Patras, Greece
| | - Rim Affes
- INRA, UR0050, Laboratoire de Biotechnologie de l'Environnement, Avenue des Etangs, 11 100 Narbonne, France
| | - Fabiana Passos
- GEMMA - Environmental Engineering and Microbiology Research Group, Department of Hydraulic, Maritime and Environmental Engineering, Universitat Politècnica de Catalunya·BarcelonaTech, c/Jordi Girona 1-3, Building D1, E-08034 Barcelona, Spain; Environmental and Chemical Technology Group, Department of Chemistry, Universidade Federal de Ouro Preto, 35400-000 Ouro Preto, Minas Gerais, Brazil
| | - Audrey Battimelli
- INRA, UR0050, Laboratoire de Biotechnologie de l'Environnement, Avenue des Etangs, 11 100 Narbonne, France
| | - Gerasimos Lyberatos
- Institute of Chemical Engineering Sciences, Stadiou, Platani, GR 26504 Patras, Greece; School of Chemical Engineering, National Technical University of Athens, GR 15780 Athens, Greece
| | - Ivet Ferrer
- GEMMA - Environmental Engineering and Microbiology Research Group, Department of Hydraulic, Maritime and Environmental Engineering, Universitat Politècnica de Catalunya·BarcelonaTech, c/Jordi Girona 1-3, Building D1, E-08034 Barcelona, Spain
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27
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Borowski S, Kubacki P. Co-digestion of pig slaughterhouse waste with sewage sludge. WASTE MANAGEMENT (NEW YORK, N.Y.) 2015; 40:119-126. [PMID: 25840737 DOI: 10.1016/j.wasman.2015.03.021] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2015] [Revised: 03/04/2015] [Accepted: 03/14/2015] [Indexed: 06/04/2023]
Abstract
Slaughterhouse wastes (SHW) are potentially very attractive substrates for biogas production. However, mono-digestion of these wastes creates great technological problems associated with the inhibitory effects of ammonia and fatty acids on methanogens as well as with the foaming in the digesters. In the following study, the co-digestion of slaughterhouse wastes with sewage sludge (SS) was undertaken. Batch and semi-continuous experiments were performed at 35°C with municipal sewage sludge and pig SHW composed of meat tissue, intestines, bristles and post-flotation sludge. In batch assays, meat tissue and intestinal wastes gave the highest methane productions of 976 and 826 dm(3)/kg VS, respectively, whereas the methane yield from the sludge was only 370 dm(3)/kg VS. The co-digestion of sewage sludge with 50% SHW (weight basis) provided the methane yield exceeding 600 dm(3)/kg VS, which was more than twice as high as the methane production from sewage sludge alone. However, when the loading rate exceeded 4 kg VS/m(3) d, a slight inhibition of methanogenesis was observed, without affecting the digester stability. The experiments showed that the co-digestion of sewage sludge with large amount of slaughterhouse wastes is feasible, and the enhanced methane production does not affect the digester stability.
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Affiliation(s)
- Sebastian Borowski
- Lodz University of Technology, Institute of Fermentation Technology and Microbiology, Wólczańska 171/173, 90-924 Łódź, Poland.
| | - Przemysław Kubacki
- Lodz University of Technology, Faculty of Process and Environmental Engineering, Wólczańska 213, 90-924 Łódź, Poland.
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28
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Chen JL, Ortiz R, Steele TWJ, Stuckey DC. Toxicants inhibiting anaerobic digestion: a review. Biotechnol Adv 2014; 32:1523-34. [PMID: 25457225 DOI: 10.1016/j.biotechadv.2014.10.005] [Citation(s) in RCA: 244] [Impact Index Per Article: 24.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2014] [Revised: 10/08/2014] [Accepted: 10/08/2014] [Indexed: 01/18/2023]
Abstract
Anaerobic digestion is increasingly being used to treat wastes from many sources because of its manifold advantages over aerobic treatment, e.g. low sludge production and low energy requirements. However, anaerobic digestion is sensitive to toxicants, and a wide range of compounds can inhibit the process and cause upset or failure. Substantial research has been carried out over the years to identify specific inhibitors/toxicants, and their mechanism of toxicity in anaerobic digestion. In this review we present a detailed and critical summary of research on the inhibition of anaerobic processes by specific organic toxicants (e.g., chlorophenols, halogenated aliphatics and long chain fatty acids), inorganic toxicants (e.g., ammonia, sulfide and heavy metals) and in particular, nanomaterials, focusing on the mechanism of their inhibition/toxicity. A better understanding of the fundamental mechanisms behind inhibition/toxicity will enhance the wider application of anaerobic digestion.
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Affiliation(s)
- Jian Lin Chen
- Advanced Environmental Biotechnology Centre, Nanyang Environment & Water Research Institute, Nanyang Technological University, Singapore 637141
| | - Raphael Ortiz
- School of Materials Science & Engineering, College of Engineering, Nanyang Technological University, Singapore 637141
| | - Terry W J Steele
- School of Materials Science & Engineering, College of Engineering, Nanyang Technological University, Singapore 637141.
| | - David C Stuckey
- Advanced Environmental Biotechnology Centre, Nanyang Environment & Water Research Institute, Nanyang Technological University, Singapore 637141; Department of Chemical Engineering, Imperial College London, London SW7 2AZ, UK.
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29
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Bayr S, Ojanperä M, Kaparaju P, Rintala J. Long-term thermophilic mono-digestion of rendering wastes and co-digestion with potato pulp. WASTE MANAGEMENT (NEW YORK, N.Y.) 2014; 34:1853-1859. [PMID: 25002371 DOI: 10.1016/j.wasman.2014.06.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2014] [Revised: 06/05/2014] [Accepted: 06/11/2014] [Indexed: 06/03/2023]
Abstract
In this study, mono-digestion of rendering wastes and co-digestion of rendering wastes with potato pulp were studied for the first time in continuous stirred tank reactor (CSTR) experiments at 55°C. Rendering wastes have high protein and lipid contents and are considered good substrates for methane production. However, accumulation of digestion intermediate products viz., volatile fatty acids (VFAs), long chain fatty acids (LCFAs) and ammonia nitrogen (NH4-N and/or free NH3) can cause process imbalance during the digestion. Mono-digestion of rendering wastes at an organic loading rate (OLR) of 1.5 kg volatile solids (VS)/m(3)d and hydraulic retention time (HRT) of 50 d was unstable and resulted in methane yields of 450 dm(3)/kg VS(fed). On the other hand, co-digestion of rendering wastes with potato pulp (60% wet weight, WW) at the same OLR and HRT improved the process stability and increased methane yields (500-680 dm(3)/kg VS(fed)). Thus, it can be concluded that co-digestion of rendering wastes with potato pulp could improve the process stability and methane yields from these difficult to treat industrial waste materials.
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Affiliation(s)
- S Bayr
- University of Jyväskylä, Department of Biological and Environmental Science, P.O. Box 35, FI-40014 University of Jyväskylä, Finland.
| | - M Ojanperä
- University of Jyväskylä, Department of Biological and Environmental Science, P.O. Box 35, FI-40014 University of Jyväskylä, Finland
| | - P Kaparaju
- University of Jyväskylä, Department of Biological and Environmental Science, P.O. Box 35, FI-40014 University of Jyväskylä, Finland
| | - J Rintala
- University of Jyväskylä, Department of Biological and Environmental Science, P.O. Box 35, FI-40014 University of Jyväskylä, Finland
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Dareioti MA, Kornaros M. Effect of hydraulic retention time (HRT) on the anaerobic co-digestion of agro-industrial wastes in a two-stage CSTR system. BIORESOURCE TECHNOLOGY 2014; 167:407-415. [PMID: 25000396 DOI: 10.1016/j.biortech.2014.06.045] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2014] [Revised: 06/11/2014] [Accepted: 06/13/2014] [Indexed: 06/03/2023]
Abstract
A two-stage anaerobic digestion system consisting of two continuously stirred tank reactors (CSTRs) operating at mesophilic conditions (37°C) were used to investigate the effect of hydraulic retention time (HRT) on hydrogen and methane production. The acidogenic reactor was fed with a mixture consisting of olive mill wastewater, cheese whey and liquid cow manure (in a ratio 55:40:5, v/v/v) and operated at five different HRTs (5, 3, 2, 1 and 0.75 d) aiming to evaluate hydrogen productivity and operational stability. The highest system efficiency was achieved at HRT 0.75 d with a maximum hydrogen production rate of 1.72 L/LRd and hydrogen yield of 0.54 mol H2/mol carbohydrates consumed. The methanogenic reactor was operated at HRTs 20 and 25 d with better stability observed at HRT 25 d, whereas accumulation of volatile fatty acids took place at HRT 20 d. The methane production rate at the steady state of HRT 25 d reached 0.33 L CH4/LRd.
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Affiliation(s)
- Margarita Andreas Dareioti
- Chemical Engineering Department, University of Patras, 1 Karatheodori Str., University Campus, 26500 Patras, Greece
| | - Michael Kornaros
- Chemical Engineering Department, University of Patras, 1 Karatheodori Str., University Campus, 26500 Patras, Greece.
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31
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Pitk P, Palatsi J, Kaparaju P, Fernández B, Vilu R. Mesophilic co-digestion of dairy manure and lipid rich solid slaughterhouse wastes: process efficiency, limitations and floating granules formation. BIORESOURCE TECHNOLOGY 2014; 166:168-177. [PMID: 24907576 DOI: 10.1016/j.biortech.2014.05.033] [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: 04/08/2014] [Revised: 05/06/2014] [Accepted: 05/11/2014] [Indexed: 06/03/2023]
Abstract
Lipid and protein rich solid slaughterhouse wastes are attractive co-substrates to increase volumetric biogas production in co-digestion with dairy manure. Addition of decanter sludge (DS), containing 42.2% of lipids and 35.8% of proteins (total solids basis), up to 5% of feed mixture resulted in a stable process without any indication of long chain fatty acids (LCFA) or free ammonia (NH3) inhibition and in 3.5-fold increase of volumetric biogas production. Contrary, only lipids addition as technical fat (TF) at over 2% of feed mixture resulted in formation of floating granules (FG) and process efficiency decrease. Formed FG had low biodegradability and its organic part was composed of lipids and calcium salts of LCFAs. Anaerobic digestion process intentionally directed to FG formation, could be a viable option for mitigation and control of lipids overload and derived LCFA inhibition.
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Affiliation(s)
- Peep Pitk
- Department of Chemistry, Tallinn University of Technology, 12618 Tallinn, Harjumaa, Estonia.
| | - Jordi Palatsi
- IRTA, GIRO Joint Research Unit IRTA-UPC, Torre Marimon, E-08140 Caldes de Montbui, Barcelona, Spain
| | - Prasad Kaparaju
- Department of Biological and Environmental Sciences, University of Jyväskylä, P.O. Box 35, FI-40014 Jyväskylä, Finland
| | - Belén Fernández
- IRTA, GIRO Joint Research Unit IRTA-UPC, Torre Marimon, E-08140 Caldes de Montbui, Barcelona, Spain
| | - Raivo Vilu
- Department of Chemistry, Tallinn University of Technology, 12618 Tallinn, Harjumaa, Estonia
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32
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Gao H, Scherson YD, Wells GF. Towards energy neutral wastewater treatment: methodology and state of the art. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2014; 16:1223-46. [PMID: 24777396 DOI: 10.1039/c4em00069b] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Conventional biological wastewater treatment processes are energy-intensive endeavors that yield little or no recovered resources and often require significant external chemical inputs. However, with embedded energy in both organic carbon and nutrients (N, P), wastewater has the potential for substantial energy recovery from a low-value (or no-value) feedstock. A paradigm shift is thus now underway that is transforming our understanding of necessary energy inputs, and potential energy or resource outputs, from wastewater treatment, and energy neutral or even energy positive treatment is increasingly emphasized in practice. As two energy sources in domestic wastewater, we argue that the most suitable way to maximize energy recovery from wastewater treatment is to separate carbon and nutrient (particularly N) removal processes. Innovative anaerobic treatment technologies and bioelectrochemical processes are now being developed as high efficiency methods for energy recovery from waste COD. Recently, energy savings or even generation from N removal has become a hotspot of research and development activity, and nitritation-anammox, the newly developed CANDO process, and microalgae cultivation are considered promising techniques. In this paper, we critically review these five emerging low energy or energy positive bioprocesses for sustainable wastewater treatment, with a particular focus on energy optimization in management of nitrogenous oxygen demand. Taken together, these technologies are now charting a path towards to a new paradigm of resource and energy recovery from wastewater.
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Affiliation(s)
- Han Gao
- Civil and Environmental Engineering, Northwestern University, Evanston, IL, USA.
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33
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Kinnunen HV, Koskinen PEP, Rintala J. Mesophilic and thermophilic anaerobic laboratory-scale digestion of Nannochloropsis microalga residues. BIORESOURCE TECHNOLOGY 2014; 155:314-322. [PMID: 24462882 DOI: 10.1016/j.biortech.2013.12.115] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2013] [Revised: 12/23/2013] [Accepted: 12/27/2013] [Indexed: 06/03/2023]
Abstract
This paper studies methane production using a marine microalga, Nannochloropsis sp. residue from biodiesel production. Residue cake from Nannochloropsis, oils wet-extracted, had a methane potential of 482LCH4kg(-1) volatile solids (VS) in batch assays. However, when dry-extracted, the methane potential of residue cake was only 194LCH4kg(-1) VS. In semi-continuous reactor trials with dry-extracted residue cake, a thermophilic reactor produced 48% higher methane yield (220LCH4kg(-1)VS) than a mesophilic reactor (149LCH4kg(-1)VS). The thermophilic reactor was apparently inhibited due to ammonia with organic loading rate (OLR) of 2kgVSm(-3)d(-1) (hydraulic retention time (HRT) 46d), whereas the mesophilic reactor performed with OLR of 3kgVSm(-3)d(-1) (HRT 30d). Algal salt content did not inhibit digestion. Additional methane (18-33% of primary digester yield) was produced during 100d post-digestion.
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Affiliation(s)
- H V Kinnunen
- Department of Chemistry and Bioengineering, Tampere University of Technology, P.O. Box 541, 33101 Tampere, Finland.
| | - P E P Koskinen
- Research and Development, Neste Oil Corporation, P.O. Box 310, 06101 Porvoo, Finland.
| | - J Rintala
- Department of Chemistry and Bioengineering, Tampere University of Technology, P.O. Box 541, 33101 Tampere, Finland.
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34
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Lins P, Reitschuler C, Illmer P. Methanosarcina spp., the key to relieve the start-up of a thermophilic anaerobic digestion suffering from high acetic acid loads. BIORESOURCE TECHNOLOGY 2013; 152:347-354. [PMID: 24315939 DOI: 10.1016/j.biortech.2013.11.020] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2013] [Revised: 11/05/2013] [Accepted: 11/11/2013] [Indexed: 06/02/2023]
Abstract
This paper investigates if it is possible to produce inocula to counteract high acetic acid (CH3COO(-)) concentrations during thermophilic anaerobic digestion. To this end, fermenter sludge was exposed for different durations to either gradually increasing CH3COO(-) concentrations or directly exposed to a high concentration (150 mM). Altogether, these enrichments led to inocula with a distinct decrease of representatives of Methanobacteriales, while those of Methanoculleus spp. were hardly affected by any treatment. After the inoculation, good agreements of the abundance of Methanosarcinales and Methanoculleus spp. with total DNA content and methane production rate were apparent. In addition, a gradual adaptation of the inoculum for at least 4 weeks led to a significant increase of Methanosarcina spp. during the subsequent fermentation. These results demonstrate the potential of bioaugmentation to relieve the start-up of an anaerobic digestion suffering from high CH3COO(-) loads, especially pointing to the robust acetoclastic genus Methanosarcina.
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Affiliation(s)
- Philipp Lins
- University of Innsbruck, Institute of Microbiology, Technikerstr. 25, A-6020 Innsbruck, Austria.
| | - Christoph Reitschuler
- University of Innsbruck, Institute of Microbiology, Technikerstr. 25, A-6020 Innsbruck, Austria
| | - Paul Illmer
- University of Innsbruck, Institute of Microbiology, Technikerstr. 25, A-6020 Innsbruck, Austria
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35
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Guo X, Wang C, Sun F, Zhu W, Wu W. A comparison of microbial characteristics between the thermophilic and mesophilic anaerobic digesters exposed to elevated food waste loadings. BIORESOURCE TECHNOLOGY 2013; 152:420-428. [PMID: 24316484 DOI: 10.1016/j.biortech.2013.11.012] [Citation(s) in RCA: 156] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2013] [Revised: 10/30/2013] [Accepted: 11/07/2013] [Indexed: 06/02/2023]
Abstract
Thermophilic and mesophilic anaerobic digestion reactors (TR and MR) using food waste as substrate were compared with emphasis on microbial responses to increasing organic loading rate (OLR). At OLR ranging from 1.0 to 2.5 g VS L(-1) d(-1), MR exhibited more stable performance compared to TR in terms of methane yield. Amplicons pyrosequencing results revealed the distinct microbial dynamics in the two reactors. Primarily, MR had greater richness and evenness of bacteria species. With OLR elevated, larger shifts of bacterial phylogeny were observed in MR; Methanosaeta dominated in archaeal community in MR while Methanothermobacter and Methanoculleus were favored in TR. The high functional redundancy in bacterial community integrated with acetoclastic methanogenesis in MR resulted in its better performance; whereas delicate interactions between hydrogen-producer and hydrogenotrophic methanogens in TR were much more prone to disruption. These results are conductive to understanding the microbial mechanisms of low methane yield during food waste anaerobic digestion.
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Affiliation(s)
- Xiaohui Guo
- College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Cheng Wang
- College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Faqian Sun
- College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Weijing Zhu
- College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Weixiang Wu
- College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China.
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36
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Wagner AO, Lins P, Malin C, Reitschuler C, Illmer P. Impact of protein-, lipid- and cellulose-containing complex substrates on biogas production and microbial communities in batch experiments. THE SCIENCE OF THE TOTAL ENVIRONMENT 2013; 458-460:256-66. [PMID: 23660521 DOI: 10.1016/j.scitotenv.2013.04.034] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2013] [Revised: 04/02/2013] [Accepted: 04/10/2013] [Indexed: 05/08/2023]
Abstract
In the present study, nine complex organic substrates from three classes (protein-, lipid-, and cellulose-rich) were investigated in batch experiments and compared with a control in order to evaluate their potential for utilisation as substrates for biogas production. High methane production was observed from protein-rich substrates; problems arose from lipid-containing, lactose and cellulose fermentation. Using DGGE analysis it could be shown that different classes of substrate resulted in different microbial communities, whereupon similar substrates tended to show a similar microbial structure. By means of qPCR Methanoculleus sp., a hydrogenotrophic methanogen was found to be the most abundant organism in the batch experiments. Additionally, it could be demonstrated that methanogenic organisms withstood adverse environmental conditions for at least an incubation period of 55 days, pointing to a high stability of the archaeal community even in times of decreasing or even failing fermenter performance.
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Affiliation(s)
- Andreas Otto Wagner
- University of Innsbruck, Institute of Microbiology, Technikerstr. 25d, A-6020 Innsbruck, Austria.
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37
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Wang Q, Peng L, Su H. The effect of a buffer function on the semi-continuous anaerobic digestion. BIORESOURCE TECHNOLOGY 2013; 139:43-9. [PMID: 23644069 DOI: 10.1016/j.biortech.2013.04.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2013] [Revised: 04/01/2013] [Accepted: 04/02/2013] [Indexed: 05/16/2023]
Abstract
The characteristics of the long term (90 d) anaerobic semi-continuous digestion of food wastes/animal slurry wastewater with different C/N ratio were investigated. The research demonstrates that, in the semi-continuous digestion process, different C/N ratios of substrate led to a significant effect to the characteristic of anaerobic digestion (AD). It is undoubtedly that the semi-continuous AD is efficient within a wide range of C/N ratios, and the lower C/N substrate promoted the activity of the methanogen in a long time, which maintained a stable high CH4 concentration and total organic carbon (TOC) utilization. During the whole AD process, an active buffer system was formed from NH4(+) and VFAs (by-products of TOC): this buffer system provided high concentrations of VFAs, thus increasing both the CH4 yield and TOC utilization; and also maintained a high tolerance to NH4(+) and VFAs in the system, which defusing the impact of NH4(+).
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Affiliation(s)
- Qingfeng Wang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, PR China
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38
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González-González A, Cuadros F. Continuous biomethanization of agrifood industry waste: A case study in Spain. Process Biochem 2013. [DOI: 10.1016/j.procbio.2013.03.013] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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39
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González-González A, Cuadros F, Ruiz-Celma A, López-Rodríguez F. Energy-environmental benefits and economic feasibility of anaerobic codigestion of Iberian pig slaughterhouse and tomato industry wastes in Extremadura (Spain). BIORESOURCE TECHNOLOGY 2013; 136:109-116. [PMID: 23567670 DOI: 10.1016/j.biortech.2013.02.031] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2012] [Revised: 02/11/2013] [Accepted: 02/14/2013] [Indexed: 06/02/2023]
Abstract
Anaerobic digestion of Iberian pig slaughterhouse and tomato industry wastes, as well as codigestion operations from such residues, are reported to achieve 54-80% reduction in Chemical Oxygen Demand and 6-19 N m(3)/m(3) substrate methane production. Furthermore, 0.79-0.88 m(3)water/m(3) substrate is seen to be recovered after the above mentioned operations, which might be used as irrigation water, and 0.12-0.21 m(3)agricultural amendment/m(3) substrate with 91-98% moisture content. The present paper also reports on the economic feasibility of both an anaerobic codigestion plant operating with 60% slaughterhouse wastes/40% tomato industry wastes (optimal ratio obtained in previous laboratory-scaled experiments), and an anaerobic digestion plant for Iberian pig slaughterhouse waste. Payback times are reported as 14.86 and 3.73 years, respectively.
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Affiliation(s)
- A González-González
- Department of Applied Physics, University of Extremadura, Avenida de Elvas S/N, 06006 Badajoz, Spain.
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40
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Pitk P, Kaparaju P, Palatsi J, Affes R, Vilu R. Co-digestion of sewage sludge and sterilized solid slaughterhouse waste: methane production efficiency and process limitations. BIORESOURCE TECHNOLOGY 2013; 134:227-232. [PMID: 23500579 DOI: 10.1016/j.biortech.2013.02.029] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2012] [Revised: 02/13/2013] [Accepted: 02/14/2013] [Indexed: 06/01/2023]
Abstract
The rendering product of Category 2 and 3 Animal By-Products is known as sterilized mass (SM) and it is mainly composed of fat and proteins, making it interesting substrate for anaerobic digestion. Batch and semi-continuous laboratory experiments were carried out to investigate the effect of SM addition in co-digestion with sewage sludge on methane production and possible process limitations. Results showed that SM addition in the feed mixture up to 5% (w/w), corresponding to 68.1% of the organic loading, increased methane production 5.7 times, without any indication of process inhibition. Further increase of SM addition at 7.5% (w/w) caused methane production decrease and volatile solids removal reduction, that was mainly related to remarkably increased free ammonia concentration in the digester of 596.5±68.6 gNH3 L(-1). Sterilized mass addition of 10% (w/w) caused intensive foaming, LCFA accumulation of 9172±701.2 mgCOD-LCFA g(-1) sample and termination of the experiment.
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Affiliation(s)
- Peep Pitk
- Department of Chemistry, Tallinn University of Technology, 12618 Tallinn, Harjumaa, Estonia.
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41
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Bayr S, Rintala J. Thermophilic anaerobic digestion of pulp and paper mill primary sludge and co-digestion of primary and secondary sludge. WATER RESEARCH 2012; 46:4713-20. [PMID: 22795957 DOI: 10.1016/j.watres.2012.06.033] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2012] [Revised: 06/15/2012] [Accepted: 06/19/2012] [Indexed: 05/16/2023]
Abstract
Anaerobic digestion of pulp and paper mill primary sludge and co-digestion of primary and secondary sludge were studied for the first time in semi-continuously fed continuously stirred tank reactors (CSTR) in thermophilic conditions. Additionally, in batch experiments, methane potentials of 210 and 230 m³CH₄/t volatile solids (VS)(added) were obtained for primary, and 50 and 100 m³CH₄/tVS(added) for secondary sludge at 35 °C and 55 °C, respectively. Anaerobic digestion of primary sludge was shown to be feasible with organic loading rates (OLR) of 1-1.4 kgVS/m³d and hydraulic retention times (HRT) of 16-32 d resulting in methane yields of 190-240 m³CH₄/tVS(fed). Also the highest tested OLR of 2 kgVS/m³d and the shortest HRT of 14-16 d could be feasible, if pH stability is confirmed. Co-digestion of primary and secondary sludge with an OLR of 1 kgVS/m³d and HRTs of 25-31 d resulted in methane yields of 150-170 m³CH₄/tVS(fed). In the digestion processes, cellulose and hemicellulose degraded while lignin did not. pH adjustment and nitrogen deficiency needs to be considered when planning anaerobic digestion of pulp and paper mill wastewater sludges.
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Affiliation(s)
- Suvi Bayr
- Department of Biological and Environmental Science, University of Jyväskylä, P.O. Box 35, FI-40014 Jyväskylä, Finland.
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42
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Bayr S, Pakarinen O, Korppoo A, Liuksia S, Väisänen A, Kaparaju P, Rintala J. Effect of additives on process stability of mesophilic anaerobic monodigestion of pig slaughterhouse waste. BIORESOURCE TECHNOLOGY 2012; 120:106-13. [PMID: 22784960 DOI: 10.1016/j.biortech.2012.06.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2012] [Revised: 06/06/2012] [Accepted: 06/10/2012] [Indexed: 05/16/2023]
Abstract
The effect of two additives on anaerobic monodigestion of pig slaughterhouse waste was studied in three laboratory scale continuously stirred tank reactors (CSTRs) operated for 242-284 days at 35°C. A higher organic loading rate (OLR), namely 2.25 kg volatile solids (VS)/m(3)d with a hydraulic retention time (HRT) of 30 d was feasible with an additive containing Fe, HCl and trace elements while an OLR of 1.5 kg VS/m(3)d (HRT 30 d) led to instabilities in CSTR with an additive consisting of Fe and HCl and in CSTR without additives. Methane yields of ca. 700 dm(3) CH(4)/kg VS(fed) were obtained in all reactors under stable conditions. Both additives decreased H(2)S concentration of the biogas below detection limit 0.5 ppm while in a control reactor H(2)S concentration was up to 1900 ppm. In conclusion, the results suggest the possibility that additives may facilitate higher OLRs in monodigestion of pig slaughterhouse waste.
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Affiliation(s)
- Suvi Bayr
- University of Jyväskylä, Department of Biological and Environmental Science, P.O. Box 35, FI-40014 University of Jyväskylä, Finland.
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43
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Pitk P, Kaparaju P, Vilu R. Methane potential of sterilized solid slaughterhouse wastes. BIORESOURCE TECHNOLOGY 2012; 116:42-46. [PMID: 22609653 DOI: 10.1016/j.biortech.2012.04.038] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2012] [Revised: 04/03/2012] [Accepted: 04/10/2012] [Indexed: 06/01/2023]
Abstract
The aim of the current study was to determine chemical composition and methane potential of Category 2 and 3 solid slaughterhouse wastes rendering products (SSHWRP) viz. melt, decanter sludge, meat and bone meal (MBM), technical fat and flotation sludge from wastewater treatment. Chemical analyses showed that SSHWRP were high in protein and lipids with total solids (TS) content of 96-99%. Methane yields of the SSHWRP were between 390 and 978 m(3) CH(4)/t volatile solids (VS)(added). Based on batch experiments, anaerobic digestion of SSHWRP from the dry rendering process could recover 4.6 times more primary energy than the energy required for the rendering process. Estonia has technological capacity to sterilize all the produced Category 2 and 3 solid slaughterhouse wastes (SSHW) and if separated from Category 1 animal by-products (ABP), it could be further utilized as energy rich input material for anaerobic digestion.
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Affiliation(s)
- Peep Pitk
- Department of Chemistry, Tallinn University of Technology, 12618 Tallinn, Harjumaa, Estonia.
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