A combined bioprocess based on solid-state fermentation for dark fermentative hydrogen production from food waste

Han, Wei; Ye, Min; Zhu, Ai Jun; Huang, Jin Gang; Zhao, Hong Ting; Li, Yong Feng

doi:10.1016/j.jclepro.2015.08.072

Cited by 48 publications

(11 citation statements)

References 25 publications

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“…In the hydrolysis of starch, α-amylase/glucoamylase addition could help to break glucosidic bonds and thus improve the hydrolysis effect. For instance, Han et al (2016c) investigated the starch conversion rate was 68.1%-96.2% with glucose production by 0.307-0.434 g glucose/g FW under enzyme pre-hydrolysis.…”

Section: Specific Role Of Enzymes For Different Fw Componentsmentioning

confidence: 99%

“…Fungal mash, which is rich in exoenzyme secretions and can be produced via the fungi solid-state fermentation (SSF) bioprocess, could be used as a crude enzyme cocktail for FW hydrolysis (Han et al, 2016c;Melikoglu et al, 2013b). Lin et al (2013) adopted fungal mash to turn FW into a form available for microbes to use directly, which could also be valuable feedstock to produce chemicals, materials, and fuels.…”

Section: Fungal Mashmentioning

confidence: 99%

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Improving the stability and efficiency of anaerobic digestion of food waste using additives: A critical review

Liu

et al. 2018

Journal of Cleaner Production

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227

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Anaerobic digestion is an effective technology to treat food waste, with methane production as renewable bioenergy. However, there are two key problems in the practical application, i.e., poor system stability and low reactor efficiency. In this paper, additives used in anaerobic digestion of food waste were systematically reviewed in view of system stability and reactor efficiency. Enzymes showed excellent property in food waste pre-hydrolysis stage with almost all macromolecular matters being rapidly resolved. Fungi fermentation process to produce hydrolytic enzymes, can be regarded as a promising and low-cost way to realize rate-limiting step elimination. It can be also concluded that adding neutralizers, buffer chemicals and some other materials is effective to maintain the pH level for practical application. Trace metals in food waste are not enough but needed for methanogens activation in long term and high loading rate operation. In addition, direct interspecies electron transfer could be much helpful for intermediate refractory organic acids degradation and methanogenesis promotion with additives of conductive materials, which is also discussed and should be studied further in anaerobic digestion of food waste. Based on literature review, a new concept is proposed for further study, suggesting that after being well liquefied with enzyme pre-hydrolysis, food waste could be co-digested with landfill leachate in a high-rate anaerobic reactor stably, resulting in a high bioenergy recovery efficiency.

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Section: Specific Role Of Enzymes For Different Fw Componentsmentioning

confidence: 99%

Section: Fungal Mashmentioning

confidence: 99%

Improving the stability and efficiency of anaerobic digestion of food waste using additives: A critical review

Liu

et al. 2018

Journal of Cleaner Production

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227

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“…Table 1 showed the composition of the waste bread which was analyzed according to procedures described in Han et al (2015). The detailed procedures for glucoamylase and protease production from solid state fermentation by A. awamori and A.oryzae were provided in our previous study (Han et al, 2016b). The enzymatic hydrolysis was carried out in two 2.5 L bioreactors.…”

Section: Enzymatic Hydrolysismentioning

confidence: 99%

Simultaneous dark fermentative hydrogen and ethanol production from waste bread in a mixed packed tank reactor

Han

et al. 2017

Journal of Cleaner Production

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Simultaneous dark fermentative hydrogen and ethanol production from waste bread in a mixed packed tank reactor (MPTR) was investigated. Waste bread was first hydrolyzed by the produced enzymes to generate the waste bread hydrolysate which was subsequently introduced to the MPTR for dark fermentative hydrogen and ethanol production. The optimal hydrogen and ethanol production rates were 15.01 mmol/(h•L) and 23.25 mmol/(h•L) when the organic loading rate reached 32 g/(L•d). The unit hydrogen and ethanol production were 4.87 mmol hydrogen/g waste bread and 7.54 mmol ethanol/g waste bread, respectively. This study provided a new direction for economic and efficient hydrogen and ethanol production from waste bread.

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“…Conventional anaerobic digestion of sludge is limited by the hydrolysis step, because most organics were enclosed by rigid microbial cell walls and not easily used by the microorganisms. Sludge pretreatment can promote the efficiency of hydrogen producing, which may be attributed to the following reasons .…”

Section: Sludge Pretreatmentmentioning

confidence: 99%

“…It is worth noting that, the physicochemical treatments could convert the macromolecules in food waste into utilizable forms when performing co‐digestion of food waste and sludge, but various inhibitory products (such as furfural) could also be produced. According to our previous researches, enzymatic hydrolysis could be a promising pretreatment, which could release the nutrients (glucose and free amino nitrogen) from food waste. Therefore, the Aspergillus awamori and Aspergillus oryzae could be used to hydrolyze the food waste to get the glucose and free amino nitrogen‐rich hydrolysate for hydrogen production.…”

Section: Future Researchmentioning

confidence: 99%

A state-of-the-art review of biohydrogen producing from sewage sludge

Yao

et al. 2018

Int J Energy Res

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Summary The amount of sewage sludge has increased remarkably with the acceleration of urbanization and the promotion of municipal wastewater treatment. Hydrogen is a promising clean fuel, considering the emerging global energy crisis and the growing demand for environmental protection. Producing hydrogen from sewage sludge through anaerobic fermentation is an economical and environmentally sustainable technology. Therefore, in this work, the mechanism of hydrogen production from sludge is critically reviewed and clarified. Current researches including sludge pretreatment and key factors affecting hydrogen production were investigated as well. Some challenges still remain, such as almost all studies feature experiments in batch cultures, and the hydrogen yields were not large. Further studies are needed in this arena, such as inhibiting hydrogen‐consuming bacteria, culturing, and screening high‐efficiency bacteria. The mechanism of hydrogen production from anaerobic co‐digestion, their factors, and techno‐economic evaluation need be further studied as well.

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A combined bioprocess based on solid-state fermentation for dark fermentative hydrogen production from food waste

Cited by 48 publications

References 25 publications

Improving the stability and efficiency of anaerobic digestion of food waste using additives: A critical review

Improving the stability and efficiency of anaerobic digestion of food waste using additives: A critical review

Simultaneous dark fermentative hydrogen and ethanol production from waste bread in a mixed packed tank reactor

A state-of-the-art review of biohydrogen producing from sewage sludge

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