投加铁盐对排水管道水质影响及控制有害气体的研究  

Impact of Ferric Iron Addition on Wastewater Quality and Control of Harmful Gases Emission

作　　者：王怡[1] 朱杜洁[1] 王社平[2] 许小冰[1] 彭党聪[1] 

机构地区：[1]西安建筑科技大学环境与市政工程学院,陕西西安710055 [2]西安市政设计研究院有限公司,陕西西安710068

出　　处：《中国给水排水》2012年第19期33-36,共4页China Water & Wastewater

基　　金：国家青年科学基金资助项目(51108368);陕西省科技计划国际合作项目(2011KW-34);教育部留学回国人员启动基金资助项目(教外司留[2011]1139号)

摘　　要：以人工配制生活污水为进水,在室温条件下采用两组平行的重力流模拟排水管道反应器,研究向管道中投加铁盐对污水水质的影响及控制有害气体的效果。测定了控制反应器和投加铁盐反应器内水质的历时和沿程变化,并比较了两管道内有害气体H2S和CH4的沿程差异。结果表明,与控制反应器相比,投加铁盐将引起对SCOD和PO43--P去除率的增大,而氨氮浓度降低。此外,铁盐对硫酸盐还原的抑制主要表现在初期,后期反而促进硫酸盐还原的进行。另一方面,控制反应器中的H2S含量最大可达0.135%,CH4的含量最大为1.3%,且均出现在管道的末端;而在投加铁盐的管道反应器中未检测到CH4,H2S含量在各反应槽中均低于0.008%。因此,投加铁盐将引起管道污水中SCOD和PO43--P去除率增大、氨氮浓度增加较小,且明显控制了CH4和H2S的释放。To assess the impact of ferric iron addition on wastewater quality and control of harmful gases emission in sewer lines, two lab-scale gravitational sewer systems fed with synthetic domestic sew- age were operated at room temperature. One received ferric iron and the other was used as a control. The results showed that the reactor with ferric iron discharged an effluent containing a lower concentration of SCOD, PO^3-4-P and ammonia nitrogen in comparison with the control reactor. However, inhibition of sulfate reduction by ferric iron addition only happened at the beginning of the experiment. Later, ferric iron would facilitate the sulfate-reducing reaction. On the other side, the maximum contents of hydrogen sulfide and methane were 0. 135% and 1.3% respectively at the end of the control reactor. On the contrary, methane was not detected at all and hydrogen sulfide content was below 0. 008 % in the reactor with ferric iron. So ferric iron addition could change the wastewater quality and substantially reduce the emis-sion of harmful gases in the sewer line.

关 键 词：污水管道反应器 污水水质 有害气体释放 铁盐 

分 类 号：X703[环境科学与工程—环境工程]