Enhanced methane production from waste activated sludge by potassium ferrate combined with ultrasound pretreatment

被引：36
作者：
Guo, Bing [1 ]
Hu, Jiawei [1 ]
Zhang, Jingsi [2 ]
Wu, Zhigen [1 ]
Li, Zhuo [1 ]
机构：
[1] Tongji Univ, State Key Lab Pollut Control & Resource Reuse, Coll Environm Sci & Engn, 1239 Siping Rd, Shanghai 200092, Peoples R China
[2] Tongji Univ, Sch Mech Engn, 4800 Caoan Rd, Shanghai 201804, Peoples R China
来源：
BIORESOURCE TECHNOLOGY | 2021年 / 341卷
基金：
上海市自然科学基金; 中国国家自然科学基金;
关键词：
  Potassium ferrate; Ultrasound pretreatment; Methane; Anaerobic digestion; Wasted activated sludge; CHAIN FATTY-ACIDS; ANAEROBIC-DIGESTION; FREE AMMONIA; HYDROLYSIS; DEWATERABILITY; FERMENTATION; MECHANISMS;
D O I：
10.1016/j.biortech.2021.125841
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
This study explored the effect of potassium ferrate (PF) combined with ultrasound (US) pretreatment on methane generation from sludge by a series of experiments and simulations. Batch experiments showed that the pretreatment of PF coupled with US exhibited positively synergy on the methane yield. And by the pretreatment of 0.05 g/g TSS (total suspended solids) PF cooperated with US (1 W/mL, 25 kHz, 15 min), the methane yield was enhanced from 180.62 +/- 3.26 to 228.83 +/- 4.76 mL/g VSS (volatile suspended solids). Mechanism studies confirmed that the co-pretreatment of PF and US efficiently promoted sludge disintegration, and the biodegradability of sludge organics was obviously enhanced. Microbial community analysis showed that the functional microorganisms participating in sludge anaerobic digestion were enriched by PF cooperated with US pretreatment, with the total abundance enhanced from 12.96% in the control to 17.96% in PF + US pretreated reactor.
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页数：9
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