• 关键词：砷  活性污泥  抑制

• 基金项目：国家自然科学基金

• 许晓路
• 浙江师范大学地理系,金华 321004

• 摘要：采用MLSS为1000mg/L,停留时间为10h的动态模拟实验,研究了As(Ⅲ)对活性污泥处理城市污水的某些影响。其结果：用10ppm、50ppmAs(Ⅲ)处理后,脱氢酶活性抑制率分别为5.4%和14.4%,BOD₅去除的抑制率分别为4.3%和10.5%,氨基酸总量的抑制率分别为3.41%和6.12%.处理72h后,有45%、35%的As(Ⅲ)转化成As(Ⅴ),此时砷的去除率分别是44.3%和40.2%;污泥的砷吸附量分别为18.64mg/g(干污泥)和76.91mg/g(干污泥)。

• Abstract：Impacts of As(Ⅲ)on the domestic wastewater treatment using active sludge procedurewere investigated experimentally at MLSS of 1000 mg/L and HRT 10h.The results aresummarized as follows:the synthetic wastewater contains of 10 and 50 ppm As(Ⅲ)enteredactivated-sludge system after 72 hours, the inhibition rate of dehydrogenase were 5.4%and14.4%, the inhibition rate of the removal rate of BOD₅ were 4.3%and 10.5%, the con-tent of acidhydrolyble amino acids decreased 3.41%and 6.12%, the oxidized rate of As(Ⅲ)by activated sludge systems were 45%and 35%respectively, the removal of As were44.3%and 40.2%, and absorbed by activated sludge 18.64 and 76. 96 mg/g(MLSS)Asrespectively.

• Key words：As  activated sludge  inhibition

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