| Title: | Waste activated sludge lysate treatment: Resource recovery and refractory organics degradation |
| Author(s): | Wang H; Liu W; Haider MR; Ju F; Yu Z; Shi Y; Cai W; Wang A; |
| Address: | "Key Laboratory of Coastal Environment and Resources of Zhejiang Province, School of Engineering, Westlake University, Hangzhou 310024, China; Institute of Advanced Technology, Westlake Institute for Advanced Study, Hangzhou 310024, Zhejiang Province, China. Shenzhen Key Laboratory of Organic Pollution Prevention and Control, Environmental Science and Engineering Research Center, Harbin Institute of Technology Shenzhen, Shenzhen 518055, China; State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150001, China. Electronic address: liuwz0326@126.com. Shenzhen Key Laboratory of Organic Pollution Prevention and Control, Environmental Science and Engineering Research Center, Harbin Institute of Technology Shenzhen, Shenzhen 518055, China. United Envirotech (Tianjin) Ltd., Tianjin 300040, China. School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China. Shenzhen Key Laboratory of Organic Pollution Prevention and Control, Environmental Science and Engineering Research Center, Harbin Institute of Technology Shenzhen, Shenzhen 518055, China; State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150001, China" |
| DOI: | 10.1016/j.jhazmat.2021.126206 |
| ISSN/ISBN: | 1873-3336 (Electronic) 0304-3894 (Linking) |
| Abstract: | "Sludge lysate is an unavoidable and refractory liquid produced from the waste activated sludge hydrothermal pyrolysis, which contains plenty of hazardous refractory organic compounds and value-added organic resources. Here, the proof of concept for an integrated strategy that couples technically compatible pretreatment to microbial electrolysis assisted AD (ME-AD) system is investigated for sludge lysate treatment and resource recovery. The pretreatment process shows a positive effectiveness on the ME-AD by reducing the organic load and inhibitory matters, which promote the residual refractory organic compounds (Maillard reaction products and humic acid-like substances) and carbon sources further biodegradation and bio-transformation. Combining membrane separation with ME-AD increased not only both the yield and purity of methane to 268.76 mL CH(4)/g COD and 98%, respectively, but also the recovery of 70.0~82.4% crude proteins (9.1 +/- 0.5 g/L) from sludge lysate. Alternatively, the alkaline precipitation combined with ME-AD enhanced the recovery efficiency of short-chain fatty acids (SCFAs). The visible decreasing in the unpleasant color of the effluents was observed, implying that the degradation of harmful refractory organic was almost eliminated in sludge lysate. This strategy is worthy to be developed in WWTP for sludge lysate treatment with considerable bio-resources recovery and refractory organics removal" |
| Keywords: | "Anaerobiosis Bioreactors Electrolysis Fatty Acids, Volatile *Methane *Sewage Waste Disposal, Fluid Anaerobic digestion Hydrothermal pyrolysis Refractory organics degradation Resource recovery Waste activated sludge;" |
| Notes: | "MedlineWang, Hui Liu, Wenzong Haider, Muhammad Rizwan Ju, Feng Yu, Zhe Shi, Yingjun Cai, Weiwei Wang, Aijie eng Research Support, Non-U.S. Gov't Netherlands 2021/09/09 J Hazard Mater. 2021 Aug 15; 416:126206. doi: 10.1016/j.jhazmat.2021.126206. Epub 2021 May 24" |
