Enzymatic Hydrolysis of FoodWaste and Methane Production Using UASB Bioreactor

Moon, Hee Cheon; Song, I. S.

doi:10.1080/15435075.2011.557845

Cited by 68 publications

(18 citation statements)

References 13 publications

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“…The hydrolysate of proteins, which contain several FANs, could be broken down further into organic acids and ammonia via deaminase secreted by fermentative bacteria (Xiao et al, 2014). Therefore, using protease as an additive improves hydrolysis rate and enhances methane production (Moon and Song, 2011). Furthermore, proteins are the sole nitrogen source as nutrient of methanogen in anaerobic digestion of FW.…”

Section: Specific Role Of Enzymes For Different Fw Componentsmentioning

confidence: 99%

“…It is worth noting that enzyme additives could not only accelerate hydrolysis rates, but also liquify FW by eliminating the solid contents. It was reported that enzyme additives were used to reduce volatile suspended solids (VSS) by 52.1-61.0% through hydrolysis (Kim et al, 2006;Moon and Song, 2011). At the same time, FW liquification could also bring further improvements on methane production (Shin et al, 2001; ACCEPTED MANUSCRIPT Stabnikova et al, 2008a).…”

Section: Solid Organics Liquification For Possible Methane Productionmentioning

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

228

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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: Solid Organics Liquification For Possible Methane Productionmentioning

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

228

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“…Among the high-rate anaerobic reactors, UASB reactor has been widely used to treat various kinds of organic wastes. UASB provides the immobilization of anaerobic bacteria by granulation resulting in high microbial activity and good settling characteristics (Moon & Song, 2011). This also allows for high OLR and the maintenance of long retention time.…”

Section: Reactor Configurationsmentioning

confidence: 99%

Bioconversion of food waste to energy: A review

Kıran

Trzcinski

et al. 2014

Fuel

586

117

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According to the Food and Agricultural Organization (FAO), one third of food produced globally for human consumption is lost along the food supply chain. In many countries food waste are currently landfilled or incinerated together with other combustible municipal wastes for possible recovery of energyheat or other forms of energy. The residual ash is disposed of in landfills. However, these two approaches are facing more and more economic and environmental stresses. incineration is an expensive waste conversion technique and can potentially cause air pollution. From an environmental viewpoint, there is urgent need for appropriate management of food waste. Due to its organics-and nutrients-rich composition, theoretically food waste canould be utilized viewed as a useful resource for production of biofuel through various fermentation processes. So far, Such conversion of food waste is potentially more profitable than the conventional waste recycling efforts. Food waste valorisation of food waste has therefore attracted increasing gained interest, with bio-fuels such as biogasmethane, hydrogen, ethanol and biodiesel as final products. Therefore, this review aims to The aim of this review is to examine provide information on the food waste situation with emphasis on the in Asia-Pacific countries and the state-of-the-art of food waste fermentation technologies for developed around the world which may be applicable for renewable energy generation.

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“…There have been the applications of food waste for lactic acid (LA) production, methane production, feed production, and so on (Lay et al 2003;Sun and Hang 2004; Zhang et al 2005;Moon and Song 2011). There has been little information on ethanol production from food waste.…”

Section: Introductionmentioning

confidence: 99%

Research on the Adoption of Lactic Acid Bacteria in Food Waste Storage and Ethanol Production

Zhang¹,

Ma²

2012

International Journal of Green Energy

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The preservation and de-odorization of food waste are very important for its utilization in fuel ethanol production as raw materials. In this paper, the inoculation of lactic acid bacteria (LAB) was carried out for food waste storage and its further fermentation for ethanol. Four contamination prevention methods, anaerobic storage, autoclaving, acid usage, the inoculation of LAB, were compared in this study. The optimum conditions for inoculation of LAB into food waste as well as the fermentation characteristic were studied. The optimum inoculum size and storage time of LAB for food waste were 0.5% (V/V) and 2 days, respectively. The quantities of microorganisms such as Escherichia coliform (E. coli) and Methicillin Resistant Staphylococcus aureu (MRSA) could not be detected in the final phase of fermentation. It proved that the inoculation of LAB in food waste could prevent the growth of putrefying bacteria. The low pH or metabolic product by lactic acid (LA) fermentation was the reason for contamination prevention.

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Enzymatic Hydrolysis of FoodWaste and Methane Production Using UASB Bioreactor

Cited by 68 publications

References 13 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

Bioconversion of food waste to energy: A review

Research on the Adoption of Lactic Acid Bacteria in Food Waste Storage and Ethanol Production

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