Anaerobic digestion of food waste – Challenges and opportunities

Xu, Fuqing; Li, Yangyang; Ge, Xinna; Yang, Liangcheng; Li, Yebo

doi:10.1016/j.biortech.2017.09.020

Cited by 754 publications

(297 citation statements)

References 105 publications

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“…The composition of household and restaurant food waste from Xu et al [25] was used as a base case study in this work. The first stage was the hydrolysis step while the second stage involved acidogenesis, acetogenesis, and methanogenesis steps.…”

Section: Resultsmentioning

confidence: 99%

Anaerobic Digestion Process of Food Waste for Biogas Production: A Simulation Approach

et al. 2019

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Anaerobic digestion (AD) involves a series of biological processes in which organic material is broken down and transformed into biogas. A simulation model of the AD process in treating food waste to produce biogas was developed using Aspen Plus software. The components list, thermodynamic property package, reaction list, reactor model, and process condition were specified in Aspen Plus. Sensitivity analysis was performed to study the effect of hydraulic retention time and changes in food waste composition on the biogas production. The methane composition in biogas decreased when the hydraulic retention time was increased which is due to the reduction of substrate consumption during the AD process. The process model is able to represent the AD process and provides a good approximation on the production of biogas under various process operating conditions.

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Section: Resultsmentioning

confidence: 99%

Anaerobic Digestion Process of Food Waste for Biogas Production: A Simulation Approach

et al. 2019

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“…Anaerobic digestion is an relatively cheap, environmental friendly microbial driven technology that can be used to generate energy from biosolids. 1 Anaerobic digestion comprises four key stages; hydrolysis, acidogenesis, acetogenesis and methanogenesis. The first three stages are generally regulated by bacteria, whereas the archaea drive the final step of methanogenesis.…”

Section: Introductionmentioning

confidence: 99%

Microbial population dynamics in temperature‐phased anaerobic digestion of municipal wastewater sludge

Hameed

Riffat

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND The present study compared the performance and capability of thermophilic–mesophilic, temperature‐phased anaerobic digestion (TPAD) of wastewater sludge at 45 and 55 °C in terms of rate of hydrolysis and methanogenesis at two point interval times – December and January – with operational conditions kept constant (total solid content 6.5%, solids retention time 12.5 days). RESULTS The reduction of volatile solids (VS) was 77% at 45 °C TPAD‐1 and 72% at 55 °C TPAD‐II. The accumulation of ammonia and volatile fatty acids (VFAs; propionic acid) were observed to be below the inhibitory range (>3000 mg L−1), whereas the methane (CH4) production (45 °C, 3.55 ± 0.47 L CH4 L−1 day−1; 35 °C, 1.44 ± 0.12 L CH4 L−1 day−1) remained considerably higher in TPAD‐I than TPAD‐II. Furthermore, the TPAD‐II system suffered from certain degree of instability due to high level of total VFAs (6087 ± 1578 mg L−1), low buffering capacity, increased level of total NH3 (2982 ± 219 mg L−1) and free NH3 (246 ± 25 mg L−1), and relatively reduced CH4 production (1.69 ± 0.1 L L−1 day). The bacterial and archaeal population of the TPADs investigated by 454 pyrosequencing and Illumina sequencing showed, in both TPAD systems, a bacterial community dominated by Firmicutes, followed by Bacteriodetes, Proteobacteria, Synergistetes and Actiniobacteria. The archaeal community was dominated by Methanimicrobia (74–84% Methanosarcina) and Methanobacteria (15–27% Methanobacterium). A progression from genus Clostridium to Coprothermobacter and Tepidanaerobacter, and Methanocarcina to Methanothermobacter and Methanobacterium was observed in TPAD‐II. CONCLUSIONS This study proved the processes driving the dynamics of key microbial population and its correlation with hydrolytic functionality of TPAD systems. © 2019 Society of Chemical Industry

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“…Anaerobic digestion (AD) has always been the hot research trend for its relatively costeffectiveness, renewable energy production and waste treatment of high-moisture and energy-rich material [2]. During AD process, biomass and organic fraction of municipal solid waste (OFMSW) can be converted into combustible biogas (mainly methane, and other gases like hydrogen and hydrogen sulfide) [2].…”

Section: Introductionmentioning

confidence: 99%

“…During AD process, biomass and organic fraction of municipal solid waste (OFMSW) can be converted into combustible biogas (mainly methane, and other gases like hydrogen and hydrogen sulfide) [2]. Parameters such as methane yield and volatile solids reduction or so were used to assess experiment performance.…”

Section: Introductionmentioning

confidence: 99%

“…However, it is significant to see that FW management also takes an important role in the renewable energy and sustainable development for values like Biomethane potential(BMP) of FW. With rising attention being moved on this field, technologies developments for this have been made continually.Anaerobic digestion (AD) has always been the hot research trend for its relatively costeffectiveness, renewable energy production and waste treatment of high-moisture and energy-rich material [2]. During AD process, biomass and organic fraction of municipal solid waste (OFMSW) can be converted into combustible biogas (mainly methane, and other gases like hydrogen and hydrogen sulfide) [2].…”

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confidence: 99%

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Latest research progress on food waste management: a comprehensive review

Zhu

Gao

Duan

2018

IOP Conf. Ser.: Earth Environ. Sci.

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Abstract.Since a large amount of food supplying is provided as a basic line measuring increasing residents' life standard, food waste has become progressively numeral considerable. Much attention has been drawn to this problem. This work gave an overview on latest researches about anaerobic digestion, composting, generalized management and other developments on management of food waste. Different technologies were introduced and evaluated. Further views on future research in such a field were proposed. IntroductionFood waste (FW) is composed of household food waste, food-processing waste, canteen and restaurant waste, which is one of the components of municipal solid waste [1]. The accumulation of FW cannot be neglected because of tremendous environmental and sanitary problems with it. FW amount is estimated to quickly increase from 2.78 billion tons to 4.16 billion tons in Asian countries by 2025[1]. About 1.3billion tons of food, fully one-third of all food produced is lost along the food supply chain every year [7]. While economy is still accelerated, FW grows larger at the same time. However, it is significant to see that FW management also takes an important role in the renewable energy and sustainable development for values like Biomethane potential(BMP) of FW. With rising attention being moved on this field, technologies developments for this have been made continually.Anaerobic digestion (AD) has always been the hot research trend for its relatively costeffectiveness, renewable energy production and waste treatment of high-moisture and energy-rich material [2]. During AD process, biomass and organic fraction of municipal solid waste (OFMSW) can be converted into combustible biogas (mainly methane, and other gases like hydrogen and hydrogen sulfide) [2]. Parameters such as methane yield and volatile solids reduction or so were used to assess experiment performance. In order to enhance methane generation performance, various aspects of AD were researched. Additive supplementation, operational alternations, parameters optimization and microbial actions have been discussed by researchers. In addition to AD, composting, co-pyrolysis and other FW managements pathways also have been conducted to research results. At the same time, investigations and sorting systems were made for governments to implement better decisions on FW management. This paper aims to critically give an overview on latest research progress and novel developments of FW management in 2018. Further views on future research needs in such a field were proposed simultaneously.

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Anaerobic digestion of food waste – Challenges and opportunities

Cited by 754 publications

References 105 publications

Anaerobic Digestion Process of Food Waste for Biogas Production: A Simulation Approach

Anaerobic Digestion Process of Food Waste for Biogas Production: A Simulation Approach

Microbial population dynamics in temperature‐phased anaerobic digestion of municipal wastewater sludge

Latest research progress on food waste management: a comprehensive review

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