摘要
本文研究了活性污无法处理生活污水过程中污泥负荷和pH对液相中总铬和Cr ̄(6+)浓度变化的影响,发现总铬和cr ̄(6+)难度最低值出现的时间随污泥负荷的增大而推迟;在达到最低值后,总铬和Cr ̄(6+)浓度呈现不断增大趋势;在污水pH为8左右时,总铬浓度的最低位显著低于pH为7左右时的最低值;波相中的铬主要以Cr ̄(6+)的形态被污泥吸附。
The effect of sludge loadings and pH on the concentrations of total chromium and Cr ̄(6+) in an actived sludge system wasstudied.The time when the lowest points of total chromium and Cr ̄(6+) concentrations appeared was postponed as the sludge loading in-creased.The concentrations increased continuously after reaching the lowest points. The concetrations of total chromium were much lowerat the pH of about 8 than that at the pH of about7.Most of thc chtomium in watcr was transferred to sludge as the compounds of Cr ̄(3+).
出处
《四川环境》
北大核心
1995年第1期14-19,共6页
Sichuan Environment