摘要
采用控制污泥浓度ＭＬＳＳ为２０００ｍｇ／Ｌ的半动态试验，我们研究了活性污泥对不同浓度砷、同一浓度但有机负荷不同时的去除能力。结果表明：活性污泥对砷的吸附在１－２小时左右达到平衡状态；含２０ｐｐｍ、１００ｐｐｍ，Ａｓ（Ⅴ）和污泥作用１２小时后，其去除率分别为５５．８％和４６．３％；只有极少量Ａｓ（Ⅴ）转化成Ａｓ（Ⅳ）；污水的有机负荷（ＣＯＤ）高，污泥对砷的去除率也上升。
Used by batch experiments wihich KLSS were controled to be 2999mg/l,the As(Ⅴ)uptake by activated-sludge ,and the effect of organic loading on the uptake rate were studied .The experiments showed :the equilibrium of absorption rate within two hours ;the removel rate of As(Ⅴ)at the concentration of 20and 100ppm were 55.8 and 46.3% respectively after 12 hours aerated .At experiments condition As(Ⅴ) can not reduced to As(Ⅴ) .The removal rate of As(Ⅴ) is higher with the addition of the organic loading.
出处
《环境科学与技术》
CAS
CSCD
北大核心
1995年第3期31-34,共4页
Environmental Science & Technology
基金
国家自然基金
