活性污泥
混合液悬浮物
废水
污水处理
超声波传感器
化学
化学需氧量
制浆造纸工业
生物反应器
有机质
空化
挥发性悬浮物
废物管理
环境工程
环境科学
有机化学
工程类
物理
机械
声学
作者
Shiwei Wu,Min Zheng,Dong Qin,Yanchen Liu,Chengwen Wang
摘要
Abstract Ultrasonic treatment for enhancing biological processes has recently attracted considerable attention in wastewater treatment. In this study, we systematically investigated the mixed liquor properties of activated sludge under ultrasonic treatment. The sludge samples were collected from the aerobic tank of a full-scale membrane bioreactor (MBR) treating municipal wastewater, and the volatile suspended solids (VSS) concentration was approximately 6.0 g/L. The results showed that ultrasonic treatment induced floc disintegration, organics release, temperature increase, microbial activity and pH variation. The maximum mg soluble chemical oxygen demand (COD) per mg VSS released was estimated to be 0.147 using the Monod equation. The exponential increase in the concentration of dissolved organic matter is related to the loss of relative heterotrophic bacterial activity. A sonolysis-cryptic growth model was demonstrated to be capable of describing ultrasonic sludge reduction, which would support the further development of ultrasonic treatment technology in activated sludge systems.
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