Inhibition of volatile fatty acids on methane production kinetics during dry co-digestion of food waste and pig manure

Copyright © 2018 Elsevier Ltd. All rights reserved.

Détails bibliographiques
Publié dans:Waste management (New York, N.Y.). - 1999. - 79(2018) vom: 01. Sept., Seite 302-311
Auteur principal: Jiang, Yan (Auteur)
Autres auteurs: Dennehy, Conor, Lawlor, Peadar G, Hu, Zhenhu, McCabe, Matthew, Cormican, Paul, Zhan, Xinmin, Gardiner, Gillian E
Format: Article en ligne
Langue:English
Publié: 2018
Accès à la collection:Waste management (New York, N.Y.)
Sujets:Journal Article Co-digestion Dry digestion Hydrogenotrophic methanogenesis Microbial community structure Syntrophic oxidation VFA inhibition Fatty Acids, Volatile Manure Methane OP0UW79H66
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245 1 0 |a Inhibition of volatile fatty acids on methane production kinetics during dry co-digestion of food waste and pig manure 
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520 |a Copyright © 2018 Elsevier Ltd. All rights reserved. 
520 |a Compared with wet digestion, dry digestion of organic wastes reduces reactor volume and requires less energy for heating, but it is easily inhibited by high volatile fatty acid (VFA) or ammonia concentration. The inhibition on methane production kinetics during dry co-digestion of food waste and pig manure is rarely reported. The aim of this study was to explore the inhibition mechanisms and the microbial interactions in food waste and pig manure dry co-digestion systems at different inoculum rates (25% and 50% based on volatile solids) and food waste/pig manure ratios (0:100, 25:75, 50:50, 75:25 and 100:0 based on volatile solids). The results showed that the preferable operation conditions were obtained at the inoculum rate of 50% and food waste/pig manure ratio of 50:50, with a specific methane yield of 263 mL/g VSadded. High VFA concentration was the main inhibition factor on methane production, and the threshold VFA inhibition concentrations ranged 16.5-18.0 g/L. Syntrophic oxidation with hydrogenotrophic methanogenesis might be the main methane production pathway in dry co-digestion systems due to the dominance of hydrogenotrophic methanogens in the archaeal community. In conclusion, dry co-digestion of food waste and pig manure is feasible for methane production without pH adjustment and can be operated stably by choosing proper operation conditions 
650 4 |a Journal Article 
650 4 |a Co-digestion 
650 4 |a Dry digestion 
650 4 |a Hydrogenotrophic methanogenesis 
650 4 |a Microbial community structure 
650 4 |a Syntrophic oxidation 
650 4 |a VFA inhibition 
650 7 |a Fatty Acids, Volatile  |2 NLM 
650 7 |a Manure  |2 NLM 
650 7 |a Methane  |2 NLM 
650 7 |a OP0UW79H66  |2 NLM 
700 1 |a Dennehy, Conor  |e verfasserin  |4 aut 
700 1 |a Lawlor, Peadar G  |e verfasserin  |4 aut 
700 1 |a Hu, Zhenhu  |e verfasserin  |4 aut 
700 1 |a McCabe, Matthew  |e verfasserin  |4 aut 
700 1 |a Cormican, Paul  |e verfasserin  |4 aut 
700 1 |a Zhan, Xinmin  |e verfasserin  |4 aut 
700 1 |a Gardiner, Gillian E  |e verfasserin  |4 aut 
773 0 8 |i Enthalten in  |t Waste management (New York, N.Y.)  |d 1999  |g 79(2018) vom: 01. Sept., Seite 302-311  |w (DE-627)NLM098197061  |x 1879-2456  |7 nnns 
773 1 8 |g volume:79  |g year:2018  |g day:01  |g month:09  |g pages:302-311 
856 4 0 |u http://dx.doi.org/10.1016/j.wasman.2018.07.049  |3 Volltext 
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