二级出水经地下水回灌后的梯级利用及安全评价  

Step Utilization of Secondary Effluent Based on Artificial Groundwater Recharge and Safety Risk Assessment

作　　者：魏亮亮[1] 赵庆良[1,2] 薛爽[1,3] 张金娜[1] 王丽娜[1] 王韶华[1] 钟卉元[1] 贾婷[1] 柳成才[1] 

机构地区：[1]哈尔滨工业大学市政环境工程学院,黑龙江哈尔滨150090 [2]城市水资源与水环境国家重点实验室,黑龙江哈尔滨150090 [3]辽宁大学环境学院,辽宁沈阳110036

出　　处：《中国给水排水》2012年第19期78-83,共6页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2009ZX07317-008);上海同济高廷耀环保科技发展基金资助项目;哈尔滨工业大学科研创新基金资助项目(HIT.NSRIF.2013111)

摘　　要：在研究了污水厂二级出水经土壤含水层处理(SAT)以及在农业灌溉、工业冷却水等回用过程中污染物迁移转化的基础上,构建了以人工地下水回灌所得再生水作为回用水源,用于农业灌溉、工业冷却水的再生水梯级利用模式,实现了水资源的"减量化、再利用、再循环"。将SAT土壤柱1.5 m处出水作为工业冷却水水源,可使冷却水系统的腐蚀速率较使用二级出水时低3/4,结垢量减少55.1%,且结垢物的结构致密、厚度变薄。将SAT土壤柱1.5 m处出水作为农业灌溉水源时,可使化学致癌风险较单独使用二级出水时低1个数量级,躯体毒害物致癌风险明显降低。The transformation of pollutants during the reuse of the secondary effluent via soil aquifer treatment （SAT） in agricultural irrigation and industrial cooling water circulation was studied. Step utilization of secondary effluent was achieved by using artificial groundwater recharge as a ＂usage reduced, reused and recycled water source. Compared to the secondary effluent without SAT, the reuse of the SAT effluent at 1.5 m depth could decrease the corrosion rate by 3/4 and scale formation by 55.1% in the cooling systems. The structure of scale would become denser and less thick. In addition, the risk of chemical carcinogens within the SAT effluent at 1.5 m depth in agricultural irrigation declined by 1 orders of magnitude compared with the secondary effluent without SAT.

关 键 词：二级出水 人工地下水回灌 梯级利用 健康风险评价 

分 类 号：X703[环境科学与工程—环境工程]