摘要
论述了污水土壤含水层处理系统中的地球化学过程。该系统通过对污染物的机械过滤、生物化学转化和降解过程、吸附／解吸过程、氧化／还原过程、沉淀／溶解过程、以及矿物的合成过程净化污水。运作周期通常为1～2d灌水／4—5d排干，年水力负荷变化于15—100m之间，应根据季节变化调整水力负荷。该系统能有效去除污水中的微生物和悬浮物，降低COD和BOD含量，和去除潜在的有毒的无机成分，如重金属和含氧阴离子。作为一种低投资、低能耗、高净化效率、运行简单的自然的污水处理技术，其在世界各国得到了广泛应用。我国部分地区水资源极其短缺，在土壤和气候条件适合的地区，应用土壤含水层处理技术处理污水，实现污水资源化，既解决了污水污染环境问题，又将在一定程度上缓解该地区的水资源短缺问题，对于经济与环境的协调发展具有重要意义。
This paper describes geochemical processes in the soil-aquifer treatment （SAT） system. SAT removes pollutants from effluent by mechanical filtration, biological and chemical degradation of organic matter, adsorption/desorption, oxidation/reduction, precipitation/dissolution, and synthesis of secondary minerals. Operation cycle generally consists of 1 - 2 d flooding per 4 - 5 d drainage and drying. Annual hydraulic load ranged from 15 m to 100 m. Hydraulic load for each flooding cycle should be adjusted according to temperature variation among seasons. SAT can significantly filter-out microorganisms and suspended materials from the effluent, reduce COD and BOD and remove potentially toxic inorganic constituents, such as heavy metals and trace oxyanions. As an effective, low technology and low-cost wastewater treatment, SAT has been used around the world. Water resource is extremely shortage in some areas of China. Therefore, where soil and climate conditions are favorable for SAT, it can be used to purify effluent to accomplish reclamation of municipal wastewater.
出处
《环境污染治理技术与设备》
CSCD
北大核心
2006年第2期1-8,共8页
Techniques and Equipment for Environmental Pollution Control
基金
教育部留学回国人员科研启动基金资助项目
关键词
污水
土壤含水层处理
资源化
effluent
soil-aquifer treatment
reclamation
