连续流反应器好氧颗粒污泥解体与丝状菌膨胀研究  

Aerobic Granular Sludge Disintegration and Filamentous Bacteria Expansion in Continuous Flow Reactor

作　　者：朱苏鹏 Zhu Supeng(School of Energy and Environmental Engineering,Hebei Engineering University,Handan 056038,China)

机构地区：[1]河北工程大学能源与环境工程学院,河北邯郸056038

出　　处：《广东化工》2023年第23期82-85,共4页Guangdong Chemical Industry

摘　　要：好氧颗粒污泥难以在连续流反应器中稳定运行是限制其在实际应用的主要挑战。本文研究了在连续流反应器中接种好氧颗粒污泥后,探讨了好氧颗粒污泥在连续流反应器中发生污泥解体的原因。分析认为,低负荷冲击是造成大量颗粒污泥解体及丝状菌过度繁殖的直接原因,根本原因在于低高径比条件下曝气所提供的水力剪切力不足,影响颗粒污泥内部传质,导致颗粒污泥解体。应用响应面法确定硅藻土、活性炭、PAC控制丝状菌的最优投加配比。结果表明,硅藻土1.5 g/L,活性炭150 mg/L,PAC 150 mg/L条件下颗粒污泥SVI30为255 mL/g,与预测结果值260 m L/g相近,污泥沉降性能得到大幅改善。为控制丝状菌膨胀导致的好氧颗粒污泥解体提供了参考方法。The difficulty of stable operation of aerobic granular sludge in continuous flow reactors is the main challenge limiting its practical application.In this paper,the reasons for the sludge disintegration of aerobic granular sludge in the continuous flow reactor after inogenic granular sludge inoculation in the continuous flow reactor are studied.According to the analysis,the low-load impact is the direct cause of the disintegration of a large number of granular sludge and the over-reproduction of filamentous bacteria,and the fundamental reason is that the hydraulic shear force provided by aeration under the condition of low H/D ratio is insufficient,which affects the internal mass transfer of granular sludge.The response surface method was used to determine the optimal dosage of diatomaceous earth,activated carbon and poly aluminum chloride to control filamentous bacteria.The study showed that the actual SVI30 was measured by diatomaceous earth 1.5 g/L,activated carbon 150 mg/L,and PAC 150 mg/L 255 mL/g,which fits well with the prediction result 260 mL/g.This paper provides a reference method for controlling the expansion of filamentous bacteria.

关 键 词：连续流好氧颗粒污泥 颗粒解体 丝状菌膨胀 响应面法 污泥膨胀控制 

分 类 号：U992[交通运输工程]