Abstract
The anaerobic digestion of food waste (FW) often leads to acidification inhibition owing to rapid biodegradation, resulting in system instability. In this study, distillers' grains (DG) and food waste were mixed in accordance with volatile solid (VS) ratios of 0.9:0.1, 0.85:0.15, 0.8:0.2, and 0.7:0.3. The experimental groups adopted yeast to conduct ethanol pre-fermentation and then inoculated sludge to perform anaerobic digestion, while the control groups conducted anaerobic digestion without pre-treatment. Results showed that the experimental groups had lower propionic acid concentrations; higher alkalinities, pH values and methane production rates and shorter stagnation periods than the control groups regardless of the mixing ratio. Specifically, at the DG/FW ratio of 0.7:0.3, compared with the control group, the propionic acid concentration was reduced by 59.6%, the alkalinity was increased by 41.7%. Even under high organic loading, the propionic acid and VFA did not accumulate in the system after ethanol pre-fermentation, and the anaerobic digestion system remained stable. At DG/FW ratios of 0.9:0.1 and 0.85:0.15, a synergistic effect was observed during the co-digestion of DG and FW. And, the synergistic effect of EP was ...Continue Reading
References
Mar 11, 2009·Water Science and Technology : a Journal of the International Association on Water Pollution Research·I AngelidakiJ B van Lier
Nov 10, 2010·Applied Microbiology and Biotechnology·Ayrat M ZiganshinSabine Kleinsteuber
Dec 31, 2010·Trends in Biotechnology·Matthew T AglerLargus T Angenent
Nov 8, 2012·Bioresource Technology·Gopi Krishna KafleKyung Ill Sung
Jan 5, 2013·Environmental Science and Pollution Research International·Yu-Qiang YangXuan-Yu Lu
Feb 6, 2013·World Journal of Microbiology & Biotechnology·Yan LiXiaodong Zhang
Jul 31, 2013·Bioresource Technology·Zhuoli TianPratap Pullammanappallil
Jan 13, 2015·Bioresource Technology·Qi ZhouXiujin Li
Apr 17, 2015·Bioresource Technology·Lei LiXuya Peng
May 6, 2015·Bioresource Technology·Haoyu WangMerle de Kreuk
Aug 4, 2015·Journal of Environmental Management·Lucas Tadeu Fuess, Marcelo Loureiro Garcia
Sep 17, 2015·Environmental Science and Pollution Research International·Dong ZhangXiaohu Dai
Feb 14, 2016·Bioresource Technology·Leandro JankeWalter Stinner
Jul 6, 2016·Environmental Science and Pollution Research International·Sam L H Chiu, Irene M C Lo
Mar 11, 2017·Bioresource Technology·Gabriel Capson-TojoRenaud Escudié
Jul 27, 2017·Bioresource Technology·Miao YuYu-You Li
Sep 18, 2017·Bioresource Technology·Yamrot M AmhaAdam L Smith
Oct 3, 2017·Bioresource Technology·Yuanyuan RenYu Liu
Dec 22, 2017·Bioresource Technology·Chuanfu WuKenji Sakai
Citations
Nov 21, 2019·Environmental Science and Pollution Research International·Xinxin MaQunhui Wang
Mar 4, 2020·Environmental Science and Pollution Research International·Shunan ZhaoQigui Niu
Jan 20, 2021·Bioresource Technology·Ming GaoQunhui Wang
Apr 23, 2021·Waste Management·Chuan ShiKun Li