[Adsorbing capability of chromium-galvanized waste water by yeast-activated sludge].
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 Cr6+ were 30.2 mg/L, 27.7 mg/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 Cr6+ were 10 g/L, 5 g/L, 50.3 mg/L and 46.2 mg/L, respectively. The removal ratio increased to 99.5% accordingly, when the activated sludge content was 10 g/L.
Department of Environmental Engineering, Jinan University, Guangzhou 510632, China. ohjgc@jnu.edu.cn
Hua
H
Yin
Jin-shao
JS
Ye
Hui
H
Peng
Na
N
Zhang
Dan-ping
DP
Xie
D000327:Adsorption; D019149:Bioreactors; D002175:Candida / Q000378:metabolism; D002857:Chromium / Q000032:analysis / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007220:Industrial Waste / Q000032:analysis; D012722:Sewage; D014865:Waste Disposal, Fluid / Q000379:methods*; D018508:Water Purification / Q000379:methods*; D015003:Yeasts / Q000378:metabolism*
D007220:Industrial Waste; D012722:Sewage; D002857:Chromium