Author:
Zhang Chao,Yang Rui,Sun Meichen,Zhang Shicheng,He Mingjing,Tsang Daniel C. W.,Luo Gang
Abstract
AbstractAnaerobic digestion (AD) has been considered as a promising technique for food waste (FW) recycling. However, the accumulation of volatile fatty acids (VFAs) restricts the stability of anaerobic reactors. The present study investigated the use of biochar produced at different conditions (750 °C-30 min, 750 °C-60 min, 750 °C-120 min, 550 °C-60 min, 650 °C-60 min, 850 °C-60 min, 950 °C-60 min) for enhancing the AD of FW. Batch experiments showed that all the biochar increased the methane production rates and biochar obtained at 750 °C-60 min resulted in the highest enhancement by 21.5%. It was further showed surface oxygen-containing functional groups and graphitization degree of biochar were the critical factors for improving methane production. Microbial analysis showed that biochar addition formed different microbial communities, andMethanosaeta,Romboutsia, andnorank_f_Anaerolineaceaewere enriched, which might be correlated with direct interspecies electron transfer (DIET). This research showed biochar could enhance the AD of FW and also revealed the main characteristics of biochar relating with the enhancement of AD.Graphical Abstract
Funder
Natural Science Foundation of Shanghai
Publisher
Springer Science and Business Media LLC
Subject
Pollution,Soil Science,Environmental Science (miscellaneous),Biomaterials
Cited by
10 articles.
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