摘要
本工业试验规模为１４００—１６００ｔ／ｄ，装置Ａ／Ｏ容积比１：３，当平均停留时间２２．６ｈ，回流比３．２，水温约３５℃左右时，平均去除率ＣＯＤｃｒ达８８．３６％、ＢＯＤ５９７．４９％、ＴＮ７７．６７％、ＡＮ９９．４１％。出水各项指标平均值为ＣＯＤＣｒ５３．５７ｍｇ／Ｌ、ＢＯＤ５５．６ｍｇ／Ｌ、ＴＮ１４．９４ｍｇ／Ｌ、ＮＨ３－Ｎ６．９２ｍｇ／Ｌ、ＡＮ１．０２ｍｇ／Ｌ、ＮａＳＣＮ２．６７ｍｇ／Ｌ，ＳＳ仅２０ｍｇ／Ｌ，因此不设二沉池。
full scale acrylonitrile wastewater treatment system with a capacity of 1400-1600 t/d was set up and by adopting an A/ O biofilm Process developed. The pilot operation of this system for a long time cave satisfactory resultS, with an effluent in which the concentration of suspended solid (SS) was as low as 20 mg/L and ftom which the water samples without removing SS had all water quality indicators in compliance with the national and loCal standards. In view of this, no clarifier was installed for this treatment system. This system had an A/Q bank volume ratio of 1:3. When it was operated at an average hydraulic residence time (HRT) of 22.6 h, a recirculating ratio of 3.2 and a water temperature of about 35 ℃,there were the following average removals: CODe,, 88.36% 1 BOD5, 97.49% ; TN (total nitrogen), 77.6%; and AN (acrylonitrile), 99.4 %. In this case, there were the followinS concentrations of pollutants in effluent: CODcr, 53.57 mg/L 1 BOD5, 5.6 mg/L F TN, 14.94 mgA;NH3-N, 6.92 mg/L; NaSCN, 2.67 mg/L; and AN, 1.02 mg/L.
出处
《环境科学》
CAS
CSSCI
CSCD
北大核心
1994年第6期43-46,共4页
Environmental Science
关键词
腈纶废水
生物膜
A/O系统
反硝化作用
废水处理
acrylonitrile, wastewater treatment, A/O bio film process, nitrogen removal, full scale pilot operation
