the National Natural Science Foundation of China (Grant Nos. 51608345, 51708386, 51378330 and 21501129);the China Postdoctoral Science Foundation (Nos. 2015M570241, 2016M591416 and 2017T100170);the Open Project of Key Laboratory of Environmental Biotechnology, CAS (No. kf2016004);the State Key Laboratory of Pollution Control and Resource Reuse Foundation,(No. PCRRF17021);the Key Research and Development (R&D) Project of Shanxi Province (No. 201603D32I012);the Scientific and Technological Project of Shanxi Province (Nos. 2015021119, 201701D221230 and 201601D021130).
Conditioning of extra carbon sources has been widely reported to facilitate fermentation of waste activated sludge (WAS). Soy sauce residue (SSR) was a relatively untapped carbon source for sludge conditioning. This b...