活性污泥工艺中控制泡沫和浮渣技术研究进展

Research Progress of Foam & Scum Control Technologies in Activated Sludge Process

对国内外研究结果表明 :Nocardia(主要是Nocardiaamarae ,Nocardiapinensis类群 ) ,其次为MicrothrixParvicella ,Actinomycetes丝状菌的过量增殖是活性污泥工艺中产生泡沫和浮渣的主要原因。结合活性污泥动力学、微生物生态学与工程实践 ,综合控制泡沫和浮渣的技术措施主要有 :控制MCRT与选择器 ,SFW技术 ,分类选择器 ,增加污泥负荷 ,避免中间厌氧区和在二沉池中的反硝化以及喷洒各种药剂 ,改进工艺结构等 .

By discussing foam & scum emergence and its harmfulness, mechanism and effective factors in domestic and foreign activated sludge process ,the paper demonstrates that surplus propagation filamentous bacteria of Nocardia (mainly Nocardia amarae, Nocardia pinensis), nest by Microthrix parvicella are the main causes to foaming & scumming. Synthetical technologies of foam & scum control in the light of kinetics theories of activated sludge, microbial ecology and engineering practice are controlling MCRT and selectors, selective floatation, classified selectors, increasing BOD 5 loading, avoiding intermediate anaerobic zone, denitrification in the secondary settling basin, spraying various pharmacies and improving process structures et al.