【摘要】 采用新型电沉积 生物膜复合工艺处理含重金属离子 (Cr3 + )有机废水 ,阐述其作用机理 .实验废水中的有机物由生物膜中的复合微生物菌群作为营养源而消耗 ;重金属离子则一部分通过电沉积去除 ,另一部分通过生物膜吸附而去除 ,净化后废水能够达到工业回用水标准 .探讨了培养、驯化后的复合微生物降解有机物动力学速率 ,并将采用复合工艺与单纯的电沉积工艺及生物膜工艺处理含重金属离子有机废水的实验结果进行对比 ,结果表明 ,C6H12 O6含量为 5 0 0mg·L-1及Cr3 + 含量为 10mg·L-1的废水 ,利用复合工艺净化处理后 ,C6H12 O6含量为 2 0— 30mg·L-1,Cr3 + 含量低于 1mg·L-1.更多还原

【Abstract】 A novel complex process of electrodeposition and biofilm is utilized to treat organic wastewater containing Cr 3+, and its purifying mechanism is also described in this article. In details, organic materials in wastewater are consumed as nutritious source by biofilm composed of microorganism and EPS (extracellular polysaccharide substance). While one part of heavy metal ions, such as Cr 3+, is removed by electrodeposition, the other part is adsorbed on biofilm. In contrast, experimental data of single electrodeposition or biofilm process are listed. Further, the kinetic curves of microbes cultivated or microbes acclimated by Cr 3+ to degrade glucose are provided,too. In conclusion, the experimental results indicate that initial wastewater consists of C 6H 12O 6 (500 mg·L -1), Cr 3+ (10 mg·L -1), after treated with the complex process, concentrations of C 6H 12O 6 and Cr 3+ are on the scale of 15-20 mg·L -1, and less than 1 mg·L -1, respectively. Purified water can meet the standards of industrial reused water.更多还原