| Title: | New insight into the effect of thermal hydrolysis on high solid sludge anaerobic digestion: Conversion pathway of volatile sulphur compounds |
| Author(s): | Li X; Chen S; Dong B; Dai X; |
| Address: | "State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, PR China. Electronic address: 1832790@tongji.ecu.cn. State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, PR China. Electronic address: chensisi@tongji.edu.cn. State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, PR China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai, PR China. Electronic address: dongbin@tongji.edu.cn. State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, PR China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai, PR China. Electronic address: daixiaohu@tongji.edu.cn" |
| DOI: | 10.1016/j.chemosphere.2019.125466 |
| ISSN/ISBN: | 1879-1298 (Electronic) 0045-6535 (Linking) |
| Abstract: | "Untreated sludge (total solids = 10%) and thermally hydrolysed sludge (total solids = 10%) were subjected to high-solid anaerobic digestion (HSAD) to study the effect of thermal hydrolysis pre-treatment (THP) on the conversion pathways of volatile sulphur compounds (VSCs). Typical VSCs were detected in the gas produced by THP at 160 degrees C for 30 min, including H(2)S, methyl mercaptan (MM), dimethyl sulphide (DMS) and dimethyl disulphide (DMDS). After THP, the organic sulphide ratio in the treated sludge had decreased from 96% to 90%, and inorganic sulphide had increased from 4% to 10%. In the THS (THP + HSAD) group, the productivity and total volume of VSCs were significantly increased. These results suggest that THP directly promotes converting organic sulphur (OS) into VSCs. Further tests revealed that THP increased the activity of reductases (adenine phosphate sulphate reductase and sulphite reductase), OS hydrolysis was the main source of VSCs in biogas, and MM could be converted into H(2)S (78%), DMS (18%) and DMDS (4%). These findings are used to elucidate the conversion pathway of sulphides in HSAD" |
| Keywords: | Anaerobiosis Biofuels/analysis Hot Temperature Hydrolysis Sewage/*chemistry Sulfur Compounds/*chemistry Volatilization High solid anaerobic digestion Sulphur conversion pathway Thermal hydrolysis pre-treatment Volatile sulphur compounds; |
| Notes: | "MedlineLi, Xin Chen, Sisi Dong, Bin Dai, Xiaohu eng England 2020/02/14 Chemosphere. 2020 Apr; 244:125466. doi: 10.1016/j.chemosphere.2019.125466. Epub 2019 Dec 7" |
