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Shrestha S, Pandey R, Aryal N, Lohani SP. Recent advances in co-digestion conjugates for anaerobic digestion of food waste. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 345:118785. [PMID: 37611516 DOI: 10.1016/j.jenvman.2023.118785] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Revised: 06/07/2023] [Accepted: 08/09/2023] [Indexed: 08/25/2023]
Abstract
Anaerobic digestion (AD) is a biological process that breaks down organic waste materials, such as food waste (FW) that produces biogas and digestate. The biogas can be utilized as biofuel, and digestate could be applied as fertilizer. However, AD of FW alone has limitations on optimal degradation, digester stability and biogas yield. Co-digestion of FW along with other organic wastes such as animal manure, agricultural residue, sewage sludge and industrial organic waste, has shown substantial improvement in degradation process with increased biogas yield. The inadequacies in FW for optimum AD, like low carbon-to-nitrogen ratio (C/N ratio), lack of trace elements and irregular particle sizes, can be nullified by adding appropriate co-digestion conjugates. This review aims to describe the characteristic inadequacies of FW and examines the effect on mesophilic co-digestion of FW with animal manure, waste sludge and agricultural wastes for biogas production optimization. A critical review on the impact of pretreatment and co-digestion to enrich the methane (CH4) content in biogas has been performed. The review also examines the microbial community shift due to co-digestion, which is critical for the stability of an anaerobic digester. Finally, it discusses the prospects and challenges for the widespread application of the co-digestion technique as an effective organic waste management practice.
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Affiliation(s)
- Sujesh Shrestha
- Department of Process, Energy and Environmental Technology, University of South-Eastern Norway, Campus Porsgrunn, Norway; Department of Environmental Science and Engineering, Kathmandu University, Nepal
| | - Rajeev Pandey
- Renewable and Sustainable Energy Laboratory, Department of Mechanical Engineering, Kathmandu University, Nepal
| | - Nabin Aryal
- Department of Process, Energy and Environmental Technology, University of South-Eastern Norway, Campus Porsgrunn, Norway.
| | - Sunil Prasad Lohani
- Renewable and Sustainable Energy Laboratory, Department of Mechanical Engineering, Kathmandu University, Nepal.
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2
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Alsaleh A, Aleisa E. Triple Bottom-Line Evaluation of the Production of Animal Feed from Food Waste: A Life Cycle Assessment. WASTE AND BIOMASS VALORIZATION 2022; 14:1169-1195. [PMID: 36091663 PMCID: PMC9442596 DOI: 10.1007/s12649-022-01914-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Accepted: 08/18/2022] [Indexed: 06/15/2023]
Abstract
This study applies a triple bottom line (TBL) framework that incorporates the environmental, economic, and social impacts of producing animal feed from food waste (FW) collected at the post-consumption stage of the food supply chain. The environmental bottom line (BL) is conducted using life cycle assessment (LCA), the economic BL is calculated using the net present value (NPV), while the social BL is assessed using the strengths, weaknesses, opportunities, and threats (SWOT) analysis. The results within the environmental BL indicate that at a 13.8% recovery rate, animal feed produced from a ton of FW saves 0.33 m2 equivalent of crop land but requires 3.5 tons of water compared to 0.9 tons and 0.78 tons for landfilling and incineration for FW treatment respectively. In addition, the production of animal feed from one ton of FW emits 1064.6 kg CO2-eq, compared to 823.6 kg CO2-eq using landfilling and 781.9 kg CO2-eq when incinerated. The economic BL indicates a profit of $3.65/ton from incinerating FW, compared to cost of $93.8 and $137.6 per ton for animal feed production and landfilling of FW respectively. The analytic hierarchy process (AHP) is applied to integrate the TBL scores and rank the scenarios accordingly. AHP recommends animal feed and incineration over landfilling by a fourfold higher score. A simulation using an augmented simplex lattice mixture (ASLM) design recommends incineration with energy recovery over animal feed production from FW collected at the consumer stage. Sensitivity analysis indicates that the production of animal feed from FW is environmentally feasible if the safe recovery rate exceeds 48%, is which possible for FW collected at early stages of the food supply chain.
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Affiliation(s)
- Alla Alsaleh
- Industrial and Management Systems Engineering Department, Kuwait University, 13060 Safat, Kuwait
| | - Esra Aleisa
- Industrial and Management Systems Engineering Department, Kuwait University, 13060 Safat, Kuwait
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3
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Ultrasonic Processing of Food Waste to Generate Value-Added Products. Foods 2022; 11:foods11142035. [PMID: 35885279 PMCID: PMC9319240 DOI: 10.3390/foods11142035] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Revised: 07/04/2022] [Accepted: 07/06/2022] [Indexed: 02/04/2023] Open
Abstract
Ultrasonic processing has a great potential to transform waste from the food and agriculture industry into value-added products. In this review article, we discuss the use of ultrasound for the valorisation of food and agricultural waste. Ultrasonic processing is considered a green technology as compared to the conventional chemical extraction/processing methods. The influence of ultrasound pre-treatment on the soluble chemical oxygen demand (SCOD), particle size, and cell wall content of food waste is first discussed. The use of ultrasonic processing to produce/extract bioactives such as oil, polyphenolic, polysaccharides, fatty acids, organic acids, protein, lipids, and enzymes is highlighted. Moreover, ultrasonic processing in bioenergy production from food waste such as green methane, hydrogen, biodiesel, and ethanol through anaerobic digestion is also reviewed. The conversion of waste oils into biofuels with the use of ultrasound is presented. The latest developments and future prospective on the use of ultrasound in developing energy-efficient methods to convert food and agricultural waste into value-added products are summarised.
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Megido L, Negral L, Fernández-Nava Y, Suárez-Peña B, Ormaechea P, Díaz-Caneja P, Castrillón L, Marañón E. Impact of organic loading rate and reactor design on thermophilic anaerobic digestion of mixed supermarket waste. WASTE MANAGEMENT (NEW YORK, N.Y.) 2021; 123:52-59. [PMID: 33561770 DOI: 10.1016/j.wasman.2021.01.012] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 12/29/2020] [Accepted: 01/10/2021] [Indexed: 06/12/2023]
Abstract
A mixture of supermarket food waste from bakery, butchery, cooked meats and cheese, fishmonger, fruit, and vegetable sections was subjected to anaerobic digestion under thermophilic conditions (55 °C). Lab-scale induced bed reactors (IBR) and completely stirred tank reactors (CSTR) were operated at different organic loading rates (OLR), i.e., 3.0, 3.6 and 4.6 kg volatile solids (VS) per m3 of reactor and day. Regardless of the type of reactor, an OLR of 3.6 kg VS/m3·day was found to be the optimum, achieving up to 48.1% more methane production per kg of treated waste than for the other OLRs tested. In general, there were no statistically significant differences (p-value < 0.05) between IBR and CSTR performance at the same OLR tested. However, for the optimum OLR, the IBR achieved a mean methane production of 1.5 L CH4/Lreactor·day (426.7 L CH4/kg VS) and the highest VS removal (89.0%, on average). This reactor obtained 22.1% more CH4 yield than the analogous CSTR and the highest methane content in the biogas (66.9% CH4). Finally, the process was successfully tested under large-scale conditions (1.25 m3 IBR pilot-plant). The CH4 production and the biodegradation yield were in line with those obtained in the lab-scale IBR.
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Affiliation(s)
- L Megido
- Department of Chemical and Environmental Engineering, University of Oviedo, Gijón, Asturias 33203, Spain.
| | - L Negral
- Department of Chemical and Environmental Engineering, University of Oviedo, Gijón, Asturias 33203, Spain
| | - Y Fernández-Nava
- Department of Chemical and Environmental Engineering, University of Oviedo, Gijón, Asturias 33203, Spain
| | - B Suárez-Peña
- Department of Materials Science and Metallurgical Engineering, University of Oviedo, Gijón 33203, Asturias, Spain
| | - P Ormaechea
- Department of Chemical and Environmental Engineering, University of Oviedo, Gijón, Asturias 33203, Spain
| | - P Díaz-Caneja
- ALIMERKA Corporation, Llanera 33690, Asturias, Spain
| | - L Castrillón
- Department of Chemical and Environmental Engineering, University of Oviedo, Gijón, Asturias 33203, Spain
| | - E Marañón
- Department of Chemical and Environmental Engineering, University of Oviedo, Gijón, Asturias 33203, Spain
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5
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Liu Y, Huang T, Peng D, Huang J, Maurer C, Kranert M. Optimizing the co-digestion supply chain of sewage sludge and food waste by the demand oriented biogas supplying mechanism. WASTE MANAGEMENT & RESEARCH : THE JOURNAL OF THE INTERNATIONAL SOLID WASTES AND PUBLIC CLEANSING ASSOCIATION, ISWA 2021; 39:302-313. [PMID: 32907511 PMCID: PMC7874384 DOI: 10.1177/0734242x20953491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Accepted: 07/29/2020] [Indexed: 06/11/2023]
Abstract
Co-digestion of sewage sludge with food waste is a beneficial pathway for sewage plants to enhance their biogas yield. This paper employs hybrid programming with system dynamics simulation to optimize such a co-digestion system from the perspective of demand-oriented biogas supply chain, thus to improve the efficiency of the biogas utilization. The optimum operational parameters of the co-digestion system are derived from the simulation model. It is demonstrated that the demand-oriented biogas supply mechanism can be effectively driven under market-oriented incentive policy. For better compensation of the external cost to assist the operations of the co-digestion supply chain, it is suggested that the substrate collection and transportation subsidy should be combined with the renewables portfolio standard to be implemented as the optimum incentives. The limitations of the study are discussed to lay the foundation for future improvements.
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Affiliation(s)
- Yiyun Liu
- Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, China
| | - Tao Huang
- Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, China
| | - Daoping Peng
- Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, China
| | - Jingjing Huang
- University of Stuttgart, Institute for Sanitary Engineering, Water Quality and Solid Waste Management, Germany
| | - Claudia Maurer
- University of Stuttgart, Institute for Sanitary Engineering, Water Quality and Solid Waste Management, Germany
| | - Martin Kranert
- University of Stuttgart, Institute for Sanitary Engineering, Water Quality and Solid Waste Management, Germany
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6
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Begum S, Anupoju GR, Eshtiaghi N. Anaerobic co-digestion of food waste and cardboard in different mixing ratios: Impact of ultrasound pre-treatment on soluble organic matter and biogas generation potential at varying food to inoculum ratios. Biochem Eng J 2021. [DOI: 10.1016/j.bej.2020.107853] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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7
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Wang C, Wang Y, Wang Y, Cheung KK, Ju F, Xia Y, Zhang T. Genome-centric microbiome analysis reveals solid retention time (SRT)-shaped species interactions and niche differentiation in food waste and sludge co-digesters. WATER RESEARCH 2020; 181:115858. [PMID: 32505886 DOI: 10.1016/j.watres.2020.115858] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Revised: 04/19/2020] [Accepted: 04/21/2020] [Indexed: 06/11/2023]
Abstract
Co-digestion of food waste with sewage sludge is widely applied for waste stabilization and energy recovery around the world. However, the effect of solid retention time (SRT) on the microbial population dynamics, metabolism and interspecies interaction have not been fully elucidated. Here, the influence of SRTs (5-25 days) on the performance of the co-digestion system was investigated and state-of-the-art genome-centric metagenomic analysis was employed to uncover the dynamics and metabolic network of the key players underlying the well-functioned and poorly-functioned co-digestion microbial communities. The results of the microbial analyses indicated that SRT largely shaped microbial community structure by enriching the syntrophic specialist Syntrophomonas and CO2/H2 ( formate)-using methanogen Methanocorpusculum in the well-functioned co-digester operated at SRT of 25 days, while selecting acid-tolerant populations Lactobacillus at SRT of 5 days. The metagenome assembled genomes (MAGs) of key players, such as Syntrophomonadaceae, Methanocorpusculum, and Mesotoga, were retrieved, additionally, the syntrophic acetate oxidation plus hydrogenotrophic methanogenesis (SAO-HM) were proposed as the dominant pathway for methane production. The metabolic interaction in the co-digestion microbial consortia was profiled by assigning MAGs into functional guilds. Functional redundancy was found in the bacterial groups in hydrolysis step, and the members in these groups reduced the direct competition by niche differentiation.
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Affiliation(s)
- Chunxiao Wang
- Environmental Microbiome Engineering and Biotechnology Laboratory, Center for Environmental Engineering Research, Department of Civil Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, China
| | - Yubo Wang
- Environmental Microbiome Engineering and Biotechnology Laboratory, Center for Environmental Engineering Research, Department of Civil Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, China
| | - Yulin Wang
- Environmental Microbiome Engineering and Biotechnology Laboratory, Center for Environmental Engineering Research, Department of Civil Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, China
| | | | - Feng Ju
- Environmental Microbiome and Biotechnology Laboratory (EMBLab), School of Engineering, Westlake University, 18 Shilongshan Road, Hangzhou, 310024, China
| | - Yu Xia
- State Environmental Protection Key Laboratory of Integrated Surface Water- Groundwater Pollution Control, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, China
| | - Tong Zhang
- Environmental Microbiome Engineering and Biotechnology Laboratory, Center for Environmental Engineering Research, Department of Civil Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, China.
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8
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Arias DE, Veluchamy C, Dunfield KE, Habash MB, Gilroyed BH. Hygienization and microbial metabolic adaptation during anaerobic co-digestion of swine manure and corn stover. BIORESOURCE TECHNOLOGY 2020; 306:123168. [PMID: 32192959 DOI: 10.1016/j.biortech.2020.123168] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 03/04/2020] [Accepted: 03/07/2020] [Indexed: 06/10/2023]
Abstract
This study assessed the effect of different swine manure (SM)/corn stover (CS) mixtures based on total solids (TS) content with respect to hygienization, microbial community dynamics and methane yields on batch anaerobic co-digestion performance. Different ratios of SM and CS with TS content between 0.69 and 6% digested at 75 d revealed SM had the greatest methane yield at 403.9 mL g-1 volatile solids added (VS) and 86.31% VS reduction. BIOLOG AN microplates and lignocellulolytic enzyme assays proved to be rapid tools for characterizing microbial community metabolism as noted by the different carbon source utilization patterns between TS loadings. Hygienization of fecal indicator bacteria groups was achieved with some (E. coli) but not all groups (Clostridia spp.). The results showed that colorimetric biochemical assays and culture-based techniques can rapidly assess microbial community dynamics during co-digestion, and that TS- in the form of lignocellulosic biomass- influences microbial metabolic activities.
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Affiliation(s)
- Daniel E Arias
- School of Environmental Sciences, University of Guelph Ridgetown Campus, Ridgetown N0P 2C0, Canada
| | - Chitraichamy Veluchamy
- Centre for Agricultural Renewable Energy and Sustainability, University of Guelph Ridgetown Campus, Ridgetown N0P 2C0, Canada.
| | - Kari E Dunfield
- School of Environmental Sciences, University of Guelph, Guelph N1G 2W1, Canada
| | - Marc B Habash
- School of Environmental Sciences, University of Guelph, Guelph N1G 2W1, Canada
| | - Brandon H Gilroyed
- School of Environmental Sciences, University of Guelph Ridgetown Campus, Ridgetown N0P 2C0, Canada; Centre for Agricultural Renewable Energy and Sustainability, University of Guelph Ridgetown Campus, Ridgetown N0P 2C0, Canada
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9
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Pramanik SK, Suja FB, Zain SM, Pramanik BK. The anaerobic digestion process of biogas production from food waste: Prospects and constraints. ACTA ACUST UNITED AC 2019. [DOI: 10.1016/j.biteb.2019.100310] [Citation(s) in RCA: 88] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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10
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Mirmohamadsadeghi S, Karimi K, Tabatabaei M, Aghbashlo M. Biogas production from food wastes: A review on recent developments and future perspectives. ACTA ACUST UNITED AC 2019. [DOI: 10.1016/j.biteb.2019.100202] [Citation(s) in RCA: 78] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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11
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Hu YY, Wu J, Li HZ, Poncin S, Wang KJ, Zuo JE. Study of an enhanced dry anaerobic digestion of swine manure: Performance and microbial community property. BIORESOURCE TECHNOLOGY 2019; 282:353-360. [PMID: 30878887 DOI: 10.1016/j.biortech.2019.03.014] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2019] [Revised: 03/01/2019] [Accepted: 03/04/2019] [Indexed: 06/09/2023]
Abstract
Anaerobic digestion could treat organic wastes and recovery energy. Dry anaerobic digestion had advantages of low heating energy, small digester and less digestate, but its methane production was poor. In this study, an enhanced dry anaerobic digestion of swine manure (thermal treatment + dry anaerobic digestion) was proposed, and its feasibility was investigated via semi-continuous experiment. Results showed that methane production rates were 314.6, 416.0, 298.0 and 69.9 mL CH4/g VS at solid retention time (SRT) of 41 d, 35 d, 29 d and 23 d. Volatile solids (VS) removal rate and methane production rate could reached 71.4% and 416.0 mL CH4/g VS respectively at SRT of 35 d. Methane production rate of the enhanced dry anaerobic digestion was 390% higher than that of dry anaerobic digestion. Microbial study indicated that hydrogenotrophic methanogens predominated with the abundance of 90.2%, while acetoclastic methanogens were not detected. This process was feasible, and was of great practical importance.
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Affiliation(s)
- Yu-Ying Hu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China; School of Civil Engineering and Architecture, East China Jiao Tong University, Nanchang 330013, China
| | - Jing Wu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China.
| | - Huai-Zhi Li
- Laboratory of Reactions and Process Engineering, Université de Lorraine, CNRS, 1, rue Grandville, BP 20451, 54001 Nancy Cedex, France
| | - Souhila Poncin
- Laboratory of Reactions and Process Engineering, Université de Lorraine, CNRS, 1, rue Grandville, BP 20451, 54001 Nancy Cedex, France
| | - Kai-Jun Wang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Jian-E Zuo
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
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12
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Nayak A, Bhushan B. An overview of the recent trends on the waste valorization techniques for food wastes. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 233:352-370. [PMID: 30590265 DOI: 10.1016/j.jenvman.2018.12.041] [Citation(s) in RCA: 130] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Revised: 12/09/2018] [Accepted: 12/14/2018] [Indexed: 05/05/2023]
Abstract
A critical and up-to-date review has been conducted on the latest individual valorization technologies aimed at the generation of value-added by-products from food wastes in the form of bio-fuels, bio-materials, value added components and bio-based adsorbents. The aim is to examine the associated advantages and drawbacks of each technique separately along with the assessment of process parameters affecting the efficiency of the generation of the bio-based products. Challenges faced during the processing of the wastes to each of the bio-products have been explained and future scopes stated. Among the many hurdles encountered in the successful and high yield generation of the bio-products is the complexity and variability in the composition of the food wastes along with the high inherent moisture content. Also, individual technologies have their own process configurations and operating parameters which may affect the yield and composition of the desired end product. All these require extensive study of the composition of the food wastes followed by their effective pre-treatments, judicial selection of the technological parameters and finally optimization of not only the process configurations but also in relation to the input food waste material. Attempt has also been made to address the hurdles faced during the implementation of such technologies on an industrial scale.
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Affiliation(s)
- A Nayak
- Innovació i Recerca Industrial I Sostenible, S.L., 08860, Spain; Graphic Era University, Dehradun, 248002, India.
| | - Brij Bhushan
- Graphic Era University, Dehradun, 248002, India; Chemical Engineering Department, Universitat Politechnica Catalunya, UPC-BarcelonaTECH, Barcelona, 08860, Spain
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13
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Soobhany N. Preliminary evaluation of pathogenic bacteria loading on organic Municipal Solid Waste compost and vermicompost. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2018; 206:763-767. [PMID: 29161678 DOI: 10.1016/j.jenvman.2017.11.029] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2017] [Revised: 10/26/2017] [Accepted: 11/10/2017] [Indexed: 06/07/2023]
Abstract
The use of composts or vermicomposts derived from organic fraction of Municipal Solid Waste (OFMSW) brought about certain disagreement in terms of high level of bacterial pathogens, thereby surpassing the legal restrictions. This preliminary study was undertaken to compare the evolution of pathogenic bacteria on OFMSW compost against vermicompost (generated by Eudrilus eugeniae) with promises of achieving sanitation goals. Analysis to quality data showed that OFMSW vermicomposting caused a moderately higher reduction in total coliforms in contrast to composting. E. coli in OFMSW composts was found to be in the range of 4.72-4.96 log10 CFU g-1 whilst on a clear contrary, E. coli was undetectable in the final vermicomposts (6.01-6.14 logs of reduction) which might be explained by the involvement of the digestive processes in worms' guts. Both OFMSW composts and vermicomposts generated Salmonella-free products which were acceptable for agricultural usage and soil improvement. In comparison to compost, the analysis of this research indicated that earthworm activity can effectively destroy bacterial pathogenic load in OFMSW vermicomposts. But still, this study necessitates extra research in order to comprehend the factors that direct pathogenic bacteria in vermicomposting and earthworm-free decomposition systems.
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Affiliation(s)
- Nuhaa Soobhany
- Department of Chemical & Environmental Engineering, Faculty of Engineering, University of Mauritius, Réduit, Mauritius.
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14
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Bundhoo ZMA, Mohee R. Ultrasound-assisted biological conversion of biomass and waste materials to biofuels: A review. ULTRASONICS SONOCHEMISTRY 2018; 40:298-313. [PMID: 28946428 DOI: 10.1016/j.ultsonch.2017.07.025] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2017] [Revised: 07/16/2017] [Accepted: 07/17/2017] [Indexed: 05/25/2023]
Abstract
Ultrasound irradiation has been gaining increasing interests over the years to assist biological conversion of lignocellulosic biomass and waste materials to biofuels. As such, this study reviewed the different effects of sonication on pre-treatment of lignocellulosic biomass and waste materials prior to biofuel production. The mechanisms of ultrasound irradiation as a pre-treatment technique were initially described and the impacts of sonication on disruption of lignocellulosic materials, alteration of the crystalline lattice structure of cellulose molecules, solubilisation of organic matter, reducing sugar production and enzymatic hydrolysis were then reviewed. Subsequently, the influences of ultrasound irradiation on bio-methane, bio-hydrogen and bio-ethanol production were re-evaluated, with most studies reporting enhanced biofuel production from anaerobic digestion or fermentation processes. Nonetheless, despite its positive impacts on biofuel production, sonication was found to be energetically inefficient based on the lab-scale studies reviewed. To conclude, this study reviewed some of the challenges of ultrasound irradiation for enhanced biofuel production while outlining some areas for further research.
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Affiliation(s)
- Zumar M A Bundhoo
- Department of Chemical & Environmental Engineering, Faculty of Engineering, University of Mauritius, Réduit, Mauritius.
| | - Romeela Mohee
- Department of Chemical & Environmental Engineering, Faculty of Engineering, University of Mauritius, Réduit, Mauritius
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15
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Negral L, Castrillón L, Marañón E, Fernández-Nava Y, Ormaechea P. Inverted phase fermentation as a pretreatment for anaerobic digestion of cattle manure and sewage sludge. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2017; 203:741-744. [PMID: 27589921 DOI: 10.1016/j.jenvman.2016.08.035] [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: 12/09/2015] [Revised: 06/22/2016] [Accepted: 08/10/2016] [Indexed: 06/06/2023]
Abstract
The aim of this research study was to analyse the effect of applying inverted phase fermentation (IPF) prior to the anaerobic digestion of cattle manure and sewage sludge. IPF promotes the endogenous bacteria present in waste and hence enzymatic hydrolysis, producing a solid-liquid separation. The clarified bottom layer or liquid phase (LP, 70% volume in manure and 65% in sludge), and the thickened top layer or solid phase (SP, 30% volume in manure and 35% in sludge) were digested separately. Operating at 37 °C, the time needed to digest the LP from manure was shorter (10 days) than that needed to digest the corresponding SP or the untreated substrate (22 days in both cases). The time needed to digest the separated phases of sludge (LP: 2 days, SP: 15 days) was lower than that needed to digest manure. Biogas production rates for the manure after pretreatment were 0.5 L/L·day for the SP and 0.7 L/L·day for the LP, allowing higher OLR (4.5-4.8 gCOD/L·day) than when digesting untreated manure and increasing biogas production by 17%. IPF applied to sewage sludge led to a production of 1.8 L/L·day at an OLR of 6.2 gCOD/L·day for the SP and 2.0 L/L·day at 12.9 gCOD/L·day for the LP. Assuming a conventional OLR of 2-3 gCOD/L·day, the advantage of applying IPF to sewage sludge resides in the possibility of operating digesters at much higher OLR.
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Affiliation(s)
- L Negral
- Department of Chemical and Environmental Engineering, University Institute of Industrial Technology of Asturias, University of Oviedo, Gijón Campus, 33203, Gijón, Spain
| | - L Castrillón
- Department of Chemical and Environmental Engineering, University Institute of Industrial Technology of Asturias, University of Oviedo, Gijón Campus, 33203, Gijón, Spain
| | - E Marañón
- Department of Chemical and Environmental Engineering, University Institute of Industrial Technology of Asturias, University of Oviedo, Gijón Campus, 33203, Gijón, Spain.
| | - Y Fernández-Nava
- Department of Chemical and Environmental Engineering, University Institute of Industrial Technology of Asturias, University of Oviedo, Gijón Campus, 33203, Gijón, Spain
| | - P Ormaechea
- Department of Chemical and Environmental Engineering, University Institute of Industrial Technology of Asturias, University of Oviedo, Gijón Campus, 33203, Gijón, Spain
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16
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Langone M, Soldano M, Fabbri C, Pirozzi F, Andreottola G. Anaerobic Digestion of Cattle Manure Influenced by Swirling Jet Induced Hydrodynamic Cavitation. Appl Biochem Biotechnol 2017; 184:1200-1218. [DOI: 10.1007/s12010-017-2612-3] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Accepted: 09/19/2017] [Indexed: 10/18/2022]
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17
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Investigation on the anaerobic co-digestion of food waste with sewage sludge. Appl Microbiol Biotechnol 2017; 101:7755-7766. [DOI: 10.1007/s00253-017-8499-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Revised: 08/22/2017] [Accepted: 08/26/2017] [Indexed: 10/18/2022]
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18
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Soobhany N, Mohee R, Garg VK. Inactivation of bacterial pathogenic load in compost against vermicompost of organic solid waste aiming to achieve sanitation goals: A review. WASTE MANAGEMENT (NEW YORK, N.Y.) 2017; 64:51-62. [PMID: 28302524 DOI: 10.1016/j.wasman.2017.03.003] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2016] [Revised: 03/02/2017] [Accepted: 03/02/2017] [Indexed: 05/15/2023]
Abstract
Waste management strategies for organic residues, such as composting and vermicomposting, have been implemented in some developed and developing countries to solve the problem of organic solid waste (OSW). Yet, these biological treatment technologies do not always result in good quality compost or vermicompost with regards to sanitation capacity owing to the presence of bacterial pathogenic substances in objectionable concentrations. The presence of pathogens in soil conditioners poses a potential health hazard and their occurrence is of particular significance in composts and/or vermicomposts produced from organic materials. Past and present researches demonstrated a high-degree of agreement that various pathogens survive after the composting of certain OSW but whether similar changes in bacterial pathogenic loads arise during vermitechnology has not been thoroughly elucidated. This review garners information regarding the status of various pathogenic bacteria which survived or diffused after the composting process compared to the status of these pathogens after the vermicomposting of OSW with the aim of achieving sanitation goals. This work is also indispensable for the specification of compost quality guidelines concerning pathogen loads which would be specific to treatment technology. It was hypothesized that vermicomposting process for OSW can be efficacious in sustaining the existence of pathogenic organisms most specifically; human pathogens under safety levels. In summary, earthworms can be regarded as a way of obliterating pathogenic bacteria from OSW in a manner equivalent to earthworm gut transit mechanism which classifies vermicomposting as a promising sanitation technique in comparison to composting processes.
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Affiliation(s)
- Nuhaa Soobhany
- Department of Chemical and Environmental Engineering, Faculty of Engineering, University of Mauritius, Reduit 80837, Mauritius.
| | - Romeela Mohee
- Office of Vice Chancellor, University of Mauritius, Reduit 80837, Mauritius
| | - Vinod Kumar Garg
- Centre for Environmental Science and Technology, Central University of Punjab, Bathinda 155001, Punjab, India
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19
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Effect of food to microbe ratio variation on anaerobic co-digestion of petrochemical wastewater with manure. J Taiwan Inst Chem Eng 2016. [DOI: 10.1016/j.jtice.2015.06.038] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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20
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Alagöz BA, Yenigün O, Erdinçler A. Enhancement of anaerobic digestion efficiency of wastewater sludge and olive waste: Synergistic effect of co-digestion and ultrasonic/microwave sludge pre-treatment. WASTE MANAGEMENT (NEW YORK, N.Y.) 2015; 46:182-8. [PMID: 26320815 DOI: 10.1016/j.wasman.2015.08.020] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Revised: 08/10/2015] [Accepted: 08/15/2015] [Indexed: 05/05/2023]
Abstract
This study investigates the effect of ultrasonic and microwave pre-treatment on biogas production from the anaerobic co-digestion of olive pomace and wastewater sludges. It was found that co-digestion of wastewater sludge with olive pomace yielded around 0.21 L CH4/g VS added, whereas the maximum methane yields from the mono-digestion of olive pomace and un-pretreated wastewater sludges were 0.18 and 0.16L CH4/g VS added. In the same way, compared to mono-digestion of these substrates, co-digestion increased methane production by 17-31%. The microwave and ultrasonic pre-treatments applied to sludge samples prior to co-digestion process led to further increase in the methane production by 52% and 24%, respectively, compared to co-digestion with un-pretreated wastewater sludge. The highest biogas and methane yields were obtained from the co-digestion of 30 min microwave pre-treated wastewater sludges and olive pomace to be 0.46 L/g VS added and 0.32 L CH4/g VS added, respectively.
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Affiliation(s)
- B Aylin Alagöz
- Bogazici University, Institute of Environmental Sciences, 34342, Bebek, Istanbul, Turkey.
| | - Orhan Yenigün
- Bogazici University, Institute of Environmental Sciences, 34342, Bebek, Istanbul, Turkey
| | - Ayşen Erdinçler
- Bogazici University, Institute of Environmental Sciences, 34342, Bebek, Istanbul, Turkey
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21
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Siddique MNI, Sakinah M, Zularisam A. Influence of flow rate variation on bio-energy generation during anaerobic co-digestion. J IND ENG CHEM 2015. [DOI: 10.1016/j.jiec.2014.12.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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22
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Kiran EU, Trzcinski AP, Liu Y. Enhancing the hydrolysis and methane production potential of mixed food waste by an effective enzymatic pretreatment. BIORESOURCE TECHNOLOGY 2015; 183:47-52. [PMID: 25722182 DOI: 10.1016/j.biortech.2015.02.033] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2014] [Revised: 02/03/2015] [Accepted: 02/08/2015] [Indexed: 06/04/2023]
Abstract
In this study, a fungal mash rich in hydrolytic enzymes was produced by solid state fermentation (SSF) of waste cake in a simple and efficient manner and was further applied for high-efficiency hydrolysis of mixed food wastes (FW). The enzymatic pretreatment of FW with this fungal mash resulted in 89.1 g/L glucose, 2.4 g/L free amino nitrogen, 165 g/L soluble chemical oxygen demand (SCOD) and 64% reduction in volatile solids within 24h. The biomethane yield and production rate from FW pretreated with the fungal mash were found to be respectively about 2.3 and 3.5-times higher than without pretreatment. After anaerobic digestion of pretreated FW, a volatile solids removal of 80.4±3.5% was achieved. The pretreatment of mixed FW with the fungal mash produced in this study is a promising option for enhancing anaerobic digestion of FW in terms of energy recovery and volume reduction.
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Affiliation(s)
- Esra Uçkun Kiran
- Advanced Environmental Biotechnology Centre, Nanyang Environment & Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, Singapore 637141, Singapore
| | - Antoine P Trzcinski
- Advanced Environmental Biotechnology Centre, Nanyang Environment & Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, Singapore 637141, Singapore
| | - Yu Liu
- Advanced Environmental Biotechnology Centre, Nanyang Environment & Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, Singapore 637141, Singapore; School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore.
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23
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Ultrasound-Enhanced Biogas Production from Different Substrates. PRODUCTION OF BIOFUELS AND CHEMICALS WITH ULTRASOUND 2015. [DOI: 10.1007/978-94-017-9624-8_8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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24
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Wang F, Li WY, Yi XN. Two-phase anaerobic co-digestion of food waste and sewage sludge. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2015; 71:52-58. [PMID: 25607669 DOI: 10.2166/wst.2014.462] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The feasibility and performance of food waste and sewage sludge co-digestion were investigated to gain insight into their resource utilization. In this study, two-phase anaerobic digestion (TPAD) was operated under a total solids mixing ratio of 1:1 and different sludge retention times (SRTs). Results show that an acidogenic reactor with a 5-day SRT obtained the highest acidification efficiency, and its acetic acid content was dominant. The organic removal rate of a methanogenic reactor (MR) with a 20-day SRT and its corresponding TPAD system with a 25-day SRT were both the highest among the MRs and TPAD systems. Volatile solids and total chemical oxygen demand average removal efficiencies of the TPAD system with a 25-day SRT reached 64.7 and 60.8%, respectively. The MR with a 30-day SRT obtained the minimum ratio of volatile fatty acid to alkalinity (0.12). The methane content generated from the different MRs fluctuated at around 70%. All of the above results can provide reference for future research.
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Affiliation(s)
- Feng Wang
- College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China E-mail:
| | - Wei-Ying Li
- College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China E-mail:
| | - Xue-Nong Yi
- School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai, China
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25
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Zhan-jiang P, Jie L, Feng-mei S, Su W, Ya-bing G, Da-lei Z. High-solid Anaerobic Co-digestion of Food Waste and Rice Straw for Biogas Production. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/s1006-8104(15)30021-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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