化学
活性污泥
铁质
响应面法
废水
蛋白酶
条件作用
色谱法
制浆造纸工业
酶
生物化学
废物管理
有机化学
数学
统计
工程类
作者
Xu Kang,Chaolin Li,Wanqing Ding,Yuhao Ma,Xu Zhou,Shuhong Gao,Chuan Chen,Wenzong Liu,Zhongqi He,Xi-qi Li,Guangming Jiang
标识
DOI:10.1016/j.jwpe.2023.103634
摘要
Waste activated sludge (WAS) conditioning is crucial for enhancing sludge dewaterability and effectively reducing the management cost. The feasibility of bio-enzymes with Fe2+-activated advanced oxidation processes (AOPs) for WAS conditioning was investigated in this study. Two representative bio-enzymes, α-amylase and neutral protease, and two typical AOPs, the Fenton system and Fe2+/Ca(ClO)2 system, were chosen. The medical dosages of AOPs were first optimized by single-factor experiments. On this basis, the dosages of bio-enzyme, ferrous ion, and oxidant were optimized using the response surface method (RSM). Results showed that neutral protease combined with the Fe2+/Ca(ClO)2 system performed better in CST and SRF reduction rates while reducing the medical dosages of AOPs. Under the optimal conditions of neutral protease dosage of 20.9 mg/g TSS, Fe2+ dosage of 0.64 mmol/g TSS, and Ca(ClO)2 dosage of 0.54 mmol/g TSS, the reduction in sludge CST and SRF reached 84.81 % and 94.06 %, respectively. The neutral protease with the Fe2+/Ca(ClO)2 system was a potential method for improving sludge dewatering performance.
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