兼氧型MBR 工艺对污泥自消化效果的研究.pdf

文档介绍：11 环境1 工程
811 2010 年 6 月第 28 卷第 3 期
兼氧型 MBR 工艺对污泥自消化效果的研究
廖志民
( 江西金达莱环保研发中心有限公司,南昌 330100)
摘要:研究了兼氧型 MBR 工艺中,当溶解氧控制在 0. 1 ~ 3. 0 mg / L 时,兼性厌氧菌和厌氧菌所占比例达 80% 。实验进
水 COD 浓度为 60 ~ 600 mg / L,COD 去除率平均达 93% ;MLVSS 浓度一直保持稳定,平均值为11 090 mg / L,而无机灰
分浓度逐渐积累,实验开始时为3 107 mg / L,实验结束时达5 830 mg / L。结果表明,兼氧型 MBR 工艺可实现污泥自消
化,不排放有机性污泥。兼氧型 MBR 工艺还对膜组件有一定自清洁作用,运行周期可达 4 个月。实验证明,兼氧型
MBR 工艺具有处理效率高、不排放有机污泥以及减轻膜污染的特点,是一种创新性的污水处理技术。
关键词:污水处理;MBR 工艺;活性污泥;COD 去除;兼性厌氧菌
THE EFFECT OF FACULTATIVE MBR PROCESS ON INTERNAL SLUDGE DIGESTION
Liao Zhimin
( Jiangxi Jindalai Environmental Protection Research Ltd,Nanchang 330100,China)
Abstract: A facultative MBR process was developed with DO from 0. 1 ~ 3. 0 mg / L,about 80% were facultative bacteria and
anaerobes in active sludge. Removal rate of COD reached to 93% on average when influent COD ranged from 60 mg / L to 600
mg / L. The concentration of active sludge as MLVSS kept constant with an averge of 11 090 mg / L,while anic sludge
increased gradually,from 3 107 mg / L to 5 830 mg / L. It is indicated that the facultative MBR can internally digest the aged
sludge without anic sludge. It can also internally clean the membrane module to some extents,operation of the
cycle can be up to 4 months. The experiment shows that the facultative MBR is highly efficient,no anic sludge and
low membrane fouling,it is an innovative te