活性污泥的铬抑制  

Chromium Inhibition on Activated Sludge

作　　者：姜晓燕[1] 金仁村[1] 

机构地区：[1]杭州师范大学生命与环境科学学院,浙江杭州310036

出　　处：《杭州师范大学学报（自然科学版）》2016年第1期50-56,共7页Journal of Hangzhou Normal University(Natural Science Edition)

基　　金："十二五"国家科技支撑计划项目(2012BAC13B02)

摘　　要：综述了废水中的Cr^(3+)和Cr^(6+)对批式和连续流活性污泥系统的影响,比较了Cr^(3+)和Cr^(6+)的毒性强弱,阐述了Cr^(3+)和Cr^(6+)毒性效果的影响因素如水力停留时间(HRT)、微生物种类、pH、污泥驯化、悬浮固体浓度(SS)等.发现Cr^(6+)与Cr^(3+)对硝化、反硝化都有不同程度的抑制,对硝化细菌的抑制强于反硝化细菌;与批式系统相比,Cr^(6+)的毒性在连续流系统中更加严重.分析了相应的毒性机理,并对今后的研究方向作了展望.This paper reviews the effects of Cr^3＋ and Cr^6＋ on batch and continuous flow activated sludge systems, compares the toxicity of Cr^3＋ and Cr^6＋ , expounds the factors that affect Cr^3＋ and Cr^6＋ toxicity including the hydraulic retention time（HRT）, microbial species, pH, sludge acclimation, suspended solids concentration（SS）, etc. Cr^3＋ and Cr^6＋ both have different degree of inhibition on nitrification and denitrification, and propose stronger inhibition on nitrifying bacteria than denitrifying bacteria. Cr^6＋ shows a more severe toxicity in continuous flow systems compared with in batch systems. The toxicity mechanism is also analyzed, and the a prospect for future research is made.

关 键 词：活性污泥 CR3+ Cr6+ 吸附 生物硝化 驯化 

分 类 号：X703.1[环境科学与工程—环境工程]