活性污泥
化学
水解
生物降解
污泥膨胀
产甲烷
降级(电信)
厌氧消化
细菌
有机质
制浆造纸工业
微生物代谢
环境化学
甲烷
污水处理
生物化学
废物管理
生物
有机化学
电信
计算机科学
工程类
遗传学
作者
Zhen Zhou,Yiyue Sun,Li Fu,Yi Zuo,Yanjun Shao,Lihua Wang,Chuanting Zhou,Ying An
标识
DOI:10.1016/j.biortech.2023.129228
摘要
The roles of the intermediate settler in the sludge process reduction activated sludge process (SPRAS), and the influences of its hydraulic retention time (HRTST) on pollutant removal and sludge reduction were investigated. Prolonging HRTST from 3.0 to 4.5 and 6.0 h resulted in sludge reduction efficiencies increased from 46.8% to 61.5% and 62.7%. The sludge accumulation in the intermediate settler formed an anaerobic zone but inhibited methane production, and the alternating microaerobic and anaerobic environment in the sludge process reduction (SPR) module increased the microbial diversity and enriched the hydrolytic and fermentative bacteria. Prolonging HRTST accelerated dissolved organic matter release and elevated the degradation of refractory fraction, and improved the sludge properties of the SPRAS. Metagenomic analysis showed that the SPR module enhanced the glycolysis pathway and decoupling metabolism for sludge reduction. The results revealed that the intermediate settler plays dual roles in solid–liquid separation and sludge reduction metabolism.
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