地下污水渗滤系统基质层ORP扰动特征及其影响因素  

Matrix ORP Disturbance Characteristics and Its Affecting Factors in Subsurface Wastewater Infiltration System

作　　者：李海波[1,2] 李英华 白雪钰[1] 白佳宁 LI Hai-bo;LI Ying-hua;BAI Xue-yu;BAI Jia-ning(School of Resources&Civil Engineering,Northeastern University,Shenyang 110819,China;Stockbridge School of Agriculture,University of Massachusetts Amherst,Amherst 01002,USA;School of Civil and Environmental Engineering,Georgia Institute of Technology,Atlanta 30332,USA)

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110819 [2]马萨诸塞大学安姆斯特分校斯托克桥农学院,马萨诸塞州安姆斯特01002 [3]佐治亚理工学院土木与环境工程学院,佐治亚州亚特兰大30332

出　　处：《东北大学学报（自然科学版）》2019年第11期1641-1647,共7页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(51578115,41571455);中央高校基本科研业务费专项资金资助项目(N16010400)

摘　　要：以往研究认为基质氧化还原电位分区呈垂直线性变化,且即使存在微区穿透现象,也未能获得充分的实验证实.为揭示氧化还原微区变化规律及其影响因素,采用土柱模拟方法探究了水力负荷与湿干比对氧化还原微区的扰动规律.结果表明:在中等水力负荷(0.1 m^3/(m^2 d))下,湿干比变化可诱导氧化还原电位分区纵向移动,硝化区随湿干比增大而缩小,反硝化区反之;湿干比过大可导致硝化与反硝化微区互穿透,产生非线性分区;水力负荷变化对氧化还原微环境扰动显著,负荷增大对中下层影响更明显;湿干比为4 h∶8 h时,氧化还原电位分区随水力负荷变化呈明显线性波动.Previous studies supported that the matrix ORP(oxidation reduction potential)partition varied linearly in the vertical direction.Even if there is mutual penetration between micro-zones,it has not been experimentally confirmed.To reveal the disturbance feature of ORP and its affecting factors,a soil column simulation experiment was conducted to study how the hydraulic loads(HLs)and wet-dry period ratios(WDPRs)influenced the OPR.The results indicated that,under a moderate HL(0.1 m^3/(m^2 d)),ORP micro-zones moved vertically along with the soil matrix inducted by WDPR.Nitrification zone expanded and denitrification zone zoomed out when DWPR was increased.Moreover,extreme small WDPR would cause nonlinear ORP partition,i.e.,mutual penetration between nitrification and denitrification zones.HL variety affected ORP micro-environment obviously,especially in the middle and lower layers of matrix while HL increased.Under 4 h∶8 h WDPR,linear ORP partition was the dominant trend along with HL variety.

关 键 词：污水地下渗滤系统 氧化还原电位 扰动 湿干比 水力负荷 

分 类 号：X506[环境科学与工程—环境工程]