Biogas production from anaerobic co-digestion of waste activated sludge: co-substrates and influencing parameters

Yang, Qi; Wu, Bo; Yao, Fubing; He, Li; Chen, Fei; Ma, Yinghao; Shu, Xiaoyu; Hou, Kunjie; Wang, Dongbo; Li, Xiaoming

doi:10.1007/s11157-019-09515-y

Cited by 78 publications

(50 citation statements)

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“…Syngas production through biomass gasification and pyrolysis and post-treatment for gas cleaning and upgrading are well-known processes broadly disclosed in [44][45][46][47][48][49][50]. Similarly, the anaerobic digestion for biogas production is a well-known and commercialized route [51][52][53][54][55][56][57][58]. Indeed, thermochemical and electrochemical processes for syngas generation are at the earlier research stage and are reviewed in [59][60][61][62].…”

Section: Introductionmentioning

confidence: 99%

Green Synthetic Fuels: Renewable Routes for the Conversion of Non-Fossil Feedstocks into Gaseous Fuels and Their End Uses

et al. 2020

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Innovative renewable routes are potentially able to sustain the transition to a decarbonized energy economy. Green synthetic fuels, including hydrogen and natural gas, are considered viable alternatives to fossil fuels. Indeed, they play a fundamental role in those sectors that are difficult to electrify (e.g., road mobility or high-heat industrial processes), are capable of mitigating problems related to flexibility and instantaneous balance of the electric grid, are suitable for large-size and long-term storage and can be transported through the gas network. This article is an overview of the overall supply chain, including production, transport, storage and end uses. Available fuel conversion technologies use renewable energy for the catalytic conversion of non-fossil feedstocks into hydrogen and syngas. We will show how relevant technologies involve thermochemical, electrochemical and photochemical processes. The syngas quality can be improved by catalytic CO and CO2 methanation reactions for the generation of synthetic natural gas. Finally, the produced gaseous fuels could follow several pathways for transport and lead to different final uses. Therefore, storage alternatives and gas interchangeability requirements for the safe injection of green fuels in the natural gas network and fuel cells are outlined. Nevertheless, the effects of gas quality on combustion emissions and safety are considered.

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Section: Introductionmentioning

confidence: 99%

Green Synthetic Fuels: Renewable Routes for the Conversion of Non-Fossil Feedstocks into Gaseous Fuels and Their End Uses

et al. 2020

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“…The implementation of an additional substrate could enhance the process stability by improving the nutrient balance and diluting the inhibitory substances in the feedstock ( Xie et al, 2016 ; Hagos et al, 2017 ). Nevertheless, the synergetic effect of this strategy on microorganisms involved in anaerobic treatment, demands the application of suitable substrates with complementary compositions ( Mata-Alvarez et al, 2014 ; Yang et al, 2019 ). It is well known that SS is characterized by low organic load, unfavorable C/N ratio and low alkalinity.…”

Section: Introductionmentioning

confidence: 99%

The effect of brewery spent grain application on biogas yields and kinetics in co-digestion with sewage sludge

Szaja

Montusiewicz

Lebiocka

et al. 2020

PeerJ

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The present study examines the effect of introducing dried brewery spent grain (BSG), known as the main solid by-product of the brewery industry on biogas yields and kinetics in co-digestion with sewage sludge (SS). The experiment was conducted in semi-continuous anaerobic reactors (supplied once a day) operating under mesophilic conditions (35°C) at different hydraulic retention times (HRT) of 18 and 20 d. In co-digestion runs, the BSG mass to the feed volume ratio was constant and maintained 1:10.The results indicated that the addition of BSG did not influence the biogas production, by comparison with SS mono-digestion (control run). At HRT of 18 d, in the co-digestion run, the average methane yield was 0.27 m3 kg/VSadded, while in the control run the higher value of 0.29 m3 kg/VSaddedwas observed. However, there was no difference in terms of statistical significance. At HRT of 20 d, the methane yield was 0.21 m3 kg/VSadded for both mono- and co-digestion runs. In the BSG presence, the decrease in kinetic constant values was observed. As compared to SS mono-digestion, reductions by 21 and 35% were found at HRT of 20 and 18 d, respectively. However, due to the supplementation of the feedstock with BSG rich in organic compounds, the significantly enhanced energy profits were achieved with the highest value of approx. 40% and related to the longer HRT of 20 d. Importantly, the mono- and co-digestion process proceeded in stable manner. Therefore, the anaerobic co-digestion of SS and BSG might be considered as a cost-effective solution that could contribute to the energy self-efficiency of wastewater treatment plants (WWTPs) and sustainable waste management for breweries.

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“…Carbon enriched FVWs need co‐digestion to enhance digestibility in less retention time. Protein‐rich co‐substrates have excellent buffering capacity and nitrogen supplementation ability [Yang et al, 2019. This balances the C/N ratio for organic substrates during degradation, reducing chances of process inhibition (Lin et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Valorization of fruit and vegetable waste for biofertilizer and biogas

Chakravarty

Mandavgane

2020

J Food Process Engineering

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The ubiquity of irrational disposal practices for fruit and vegetable waste (FVW) poses prohibitive environmental and economic liability. Anaerobic digestion of fruit and vegetable residues into biofertilizer is a potential solution to reduce environmental pollution and improve soil nutrition. High carbon and low nitrogen content is the main challenge in the bioprocessing of FVWs. In such cases, FVWs is co‐digested with another eco‐waste, the slaughterhouse wastewater (SWW). The issues of abattoir waste disposal are a serious threat to the societal health and hygiene. Interestingly, SWW is a house of mixed microorganisms which release enzymes for anaerobic digestion. In our present study, a two‐stage digestion process, that is, anaerobic digestion followed aerobic digestion using Trichoderma reesei is carried out under optimized conditions for enhanced biofertilizer formation. Each stage was completed in 15 days, total digestion time being 1 month. Biogas generated during the anaerobic process is 16 L/kg for fruit wastes (FWs) and 13.2 L/kg for vegetable wastes (VWs). Significant decrease in lignin up to 64% in case of FWs and 70% in case of VWs helped in cellulose degradation. The FVWs are finally reduced to a potential value‐added biofertilizer with 10–11 C: N ratio. Practical Applications Stringent wastes like fruit and vegetable waste (FVW) as well as the slaughterhouse waste were considered for bioremediation and value‐added application. A simple, rapid, unique, and easy to scale‐up technique was envisaged for conversion of FVWs into potential biofertilizer through two‐stage co‐digestion. The studies conducted will be useful for FVW management at household as well as industrial level.

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Biogas production from anaerobic co-digestion of waste activated sludge: co-substrates and influencing parameters

Cited by 78 publications

References 154 publications

Green Synthetic Fuels: Renewable Routes for the Conversion of Non-Fossil Feedstocks into Gaseous Fuels and Their End Uses

Green Synthetic Fuels: Renewable Routes for the Conversion of Non-Fossil Feedstocks into Gaseous Fuels and Their End Uses

The effect of brewery spent grain application on biogas yields and kinetics in co-digestion with sewage sludge

Valorization of fruit and vegetable waste for biofertilizer and biogas

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