摘要
研究厌氧－好氧交替工艺中好氧颗粒活性污泥的培养和理化特性．在普通好氧曝气条件下，反应器内培养出了好氧颗粒活性污泥，颗粒直径０．５—１．５ｍｍ，比重１．００７左右，含水率９７％—９８％．ＭＬＳＳ４．０４—６．８８％ｇ／Ｌ，ＳＶＩ２０—４５ｍｌ／ｇ，一般约３０ｍｌ／ｇ．颗粒污泥受阻沉降层的均匀沉降速度ｖｓ约２．１５ｃｍ／ｍｉｎ，临界浓度时沉降速度值ｖ２约０．３５ｃｍ／ｍｉｎ．颗粒污泥的耗氧速率ＯＵＲＷ１．２７ｍｇ／（ｇ·ｍｉｎ），这些理化指标均优于普通的活性污泥．对于ＣＯＤ浓度３７２—５４８ｍｇ／Ｌ、Ｐ浓度９．８４—１３．５７ｍｇ／Ｌ的生活污水，总ＣＯＤ去除率和除Ｐ效率一般分别在９０％以上．
This paper first reports the cultivation and physic chemical characteristics of granular activated sludge in a single alternation of anaerobic/aerobic (AAA) process.It was shown that under conventional condition,the granular activated sludge was formed and observed in the reactor,0 5—1 5 mm in diameter,specific weight about 1 007g/cm 3,water content 97%—98%,MLSS4 04—6 88g/L,SVI20—45ml/g (normally 30 ml/g),settling velocity in inhibited layer 2.15 cm/min,the settling velocity in compressed layer 0 35cm/min,specific oxygen utilizing rate of sludge (OUR W) 1.27mg/(g·min).These properties of the granular activated sludge are better than the parameters of conventional activated sludge.For the domestic sewage treatment of COD 372—548mg/L and P concentration 9 84—13 57mg/L,the COD and P removal efficiencies could reach more than 90%.
出处
《环境科学》
EI
CAS
CSCD
北大核心
1999年第2期38-41,共4页
Environmental Science
基金
清华大学研究基金
关键词
颗粒活性污泥
厌氧
好氧
生活污水处理
除磷
granular activated sludge,alternation of anaerobic/aerobic process,domestic sewage treatment,biological phosphorus removal.
