单质铁强化生物还原法处理硫酸盐废水  

Iron Enhanced Biological Reduction Process for Treatment of Sulfate-containing Wastewater

作　　者：冯颖[1] 康勇[1] 范福洲[1] 孔琦[1] 

机构地区：[1]天津大学化工学院,天津300072

出　　处：《中国给水排水》2005年第7期32-35,共4页China Water & Wastewater

基　　金：国家自然科学基金资助项目(C20106014)

摘　　要：为提高生物法处理酸性硫酸盐废水的效果,采用间歇试验对生物还原体系的特性进行了研究,重点考察了加入单质铁(Fe0)对硫酸盐还原反应的强化作用。结果表明,pH>6.5的中性偏酸环境最适合硫酸盐还原菌(SRB)的生长代谢,降低pH值会抑制反应的进行,且初始pH值越低则抑制作用越强。Fe0对硫酸盐还原过程有强化作用,可使体系承受更大的酸性负荷,并明显缩短了反应延迟期,但是对硫酸盐的还原反应速度、最终去除量和还原率几乎没有影响。废水pH值随着硫酸盐还原反应的进行而提高,经过SRB处理后最终可达7.0以上。加入Fe0的体系进行硫酸盐还原反应所消耗的COD较少,ΔCOD/ΔSO2-4为0.91～0.98。In order to improve the effect of acid sulfate-containing wastewater treatment by using biological process, the characteristics of biological reduction system was studied by way of intermittent test, with emphasis on the addition of iron (Fe0) for enhancing the sulfate reduction reaction. The result shows that the condition of pH >6.5 is most favorable to growing and metabolizing of sulfate-reducing bacteria (SRB). To lower pH will inhibit the reaction, and the lower the initial pH value, the stronger inhibition the reaction suffers. Fe0 can enhance the sulfate reduction process, so that the system can endure more acidity load, and then greatly shorten the retardant period of reaction, but it has little impact on reaction velocity, final removal rate, and rate of reduction. pH of wastewater is increased along with the reduction reaction and can reach above 7.0 after treated by SRB. Less COD consumption is required for Fe0 enhanced system, with ΔCOD/ΔSO 2-_4 of 0.91-0.98.

关 键 词：酸性硫酸盐废水 硫酸盐还原菌 单质铁 

分 类 号：X703.1[环境科学与工程—环境工程]