干湿比对砂土地下渗滤系统净化能力的影响  

EFFECT OF DRY-WET RATIO ON REMOVAL EFFICIENCY OF SANDY SOIL SUBSURFACE INFILTRATION SYSTEM

作　　者：李晓东 刘冉[2] 郭锋[3] 张巍 晁雷 

机构地区：[1]辽宁省环境科学研究院,沈阳110161 [2]东北大学资源与土木工程学院,沈阳110004 [3]辽宁社会科学院,沈阳110031

出　　处：《环境工程》2015年第1期53-56,共4页Environmental Engineering

基　　金：国家水体污染控制与治理科技重大专项(2012ZX07202-003;2012ZX07212-001)

摘　　要：通过搭建以砂土为主的地下渗滤系统,考察不同干湿比条件对地下渗滤系统污染物净化能力的影响。在水力负荷为0.08 m3/(m2·d)时,设5种运行条件,分别为连续运行及4个干湿比条件(1∶2、1∶1、2∶1、3∶1)。研究表明:干湿运行对地下渗滤系统的净化能力影响显著,其中干湿比为1∶1时污染物净化效果最好,COD、氨氮、TN、TP去除率分别达到90%、95%、70%、85%。建议北方以砂质土壤为主的地区采用地下渗滤系统处理污水时,稳定运行最佳干湿比为1∶1。Through soil infiltration filter system,the effects of difference dry-wet ratio on the removal efficiency of subsurface infiltration system( SIS) were discussed. At the hydraulic loading of 0. 08 m3/( m2·d),five kinds of operating conditions were set up,dividing the continuous operation and four dry-wet ratio conditions( 1 ∶ 2,1 ∶ 1,2 ∶ 1 and 3 ∶ 1). The results showed that intermittent running was a positive method to enhance the removal efficiency of SIS. The dry-wet ratio of 1∶ 1 had the best removal efficiency that COD,ammonia nitrogen,TN and TP removal rates reached 90%,95%,70% and 90%respectively. Dry-wet ratio of 1∶ 1 in SIS was suggested when used in the north area predominantly sandy soil.

关 键 词：地下渗滤系统 干湿比 砂土基质 生活污水 

分 类 号：X703[环境科学与工程—环境工程]