混合硫酸盐还原菌与Cu/Fe颗粒协同处理含铬废水的研究

利用化学沉淀法制备Cu/Fe双金属颗粒,并从工业污泥中驯化得耐Cr（Ⅵ）硫酸盐还原菌厌氧混合菌群（SRB）,将两者协同处理含Cr（Ⅵ）废水.研究比较了SRB-Cu/Fe体系与传统SRB体系、Cu/Fe体系处理废水的效果,并探讨了不同QCu/Fe、pH值对SRB-Cu/Fe体系处理效果的影响.结果表明,SRB-Cu/Fe...

Treating Cr(VI)-containing wastewater by a consortium of sulfate reducing bacteria and copper-iron bimetallic particles

Copper-iron bimetallic particles were prepared by chemical precipitation technique. Under the help of the particles Cr(VI)-containing wastewater was well treated by a consortium of sulfate reducing bacteria, which were enriched from industrial wastewater and acclimatized to tolerant to high concentrations of Cr(VI). SRB-Cu/Fe system, traditional SRB system and Cu/Fe system were experimented in the batch bioreactor, respectively. It is demonstrated that SRB-Cu/Fe bimetallic system perform much better than traditional SRB system or copper-iron bimetallic. The acclimation period of SRB was significantly reduced and the inhibiting concentration of Cr(VI) of SRB was also greatly increased by approximately 200% (from 100 mg x L(-1) to 300 mg x L(-1)). Under the conditions of Cr(VI) 300 mg x L(-1), Q(Cu)/Fe 7.5%, pH 5.0-8.0, the concentration of total chromium was less than 0.512 mg/L, Cr(VI) less than 0.071 mg, Cu next to zero after 48 h treatment. Having biological, chemical advantages and high efficiency, the novel SRB-Cu/Fe system should have the broad application prospects in industrial wastewater.