摘要
研究了解脂假丝酵母 (Candidalipolytica 1977)、产朊假丝酵母 (Candidautilis 12 2 5 )和活性污泥处理含铬电镀废水的吸附与还原性能 结果表明 ,解脂假丝酵母对废水的 pH适应范围广 .当 pH =3 2～ 6 0时 ,2 5g/L菌体对电镀废水中 30 2mg/L总铬的去除率达 85 0 % ;对 2 7 7mg/LCr6+ 的还原率高达 10 0 % .2株酵母协同处理电镀废水 ,可以有效的提高铬的生物吸附效率 ,对 30 2mg/L总铬的去除率达 91 1% .曝气生物吸附法研究结果表明 ,该法是本研究中处理含铬电镀废水最有效的方法 .10 g/L酵母菌 ,5 g/L活性污泥处理 5 0 3mg/L总铬、4 6 2mg/LCr6+ 水样 8h后 ,去除率达 93 8% ;而当污泥浓度为 10 g/L时 ,去除率高达 99 5 % .
The capability of bioadsorption and bioreduction of chromium-galvanized wastewater by Candida lipolytica 1977,Candida utilis 1225, and activated sludge was discussed in this paper. The experimental results showed that the feasible pH range for C. lipolytica 1977 adsorption was wide. The removal and reduction ratios of C. lipolytica 1977 towards chromium-galvanized wastewater were 85.0 %, and 100%, when pH was 3.2～6.0, and the concentrations of Cr(total) and Cr 6+ were 30.2 mg/L, 27.7mg/L respectively. The removal ratio increased to 91.1%, when the chromium-galvanized wastewater was treated by two strains together. The aerobic bioadsorption treatment of chromium-galvanized wastewater was investigated. The results demonstrated that this method was the optimal one for the treatment of this kind of wastewater in the study, the removal ratio was 93.8 %, when the concentrations of yeast, activated sludge, Cr(total) and Cr 6+ were 10g/L, 5g/L, 50.3mg/L and 46.2mg/L, respectively. The removal ratio increased to 99.5% accordingly, when the activated sludge content was 10g/L.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2004年第3期61-64,共4页
Environmental Science
基金
国家自然科学基金资助项目 ( 5 0 2 780 40 )
广东省教育厅"千百十工程"基金资助项目 (Q0 2 0 2 1)
关键词
生物吸附剂
假丝酵母
铬
电镀废水
活性污泥
biosorbent
Candida spp.
chromium
wastewater of galvanization
activated sludge
