砾间接触氧化技术在流域治理中的应用

随着中国城市化进程的高速发展,来自区域内分散点源和非点源的污染对水环境造成了严重影响,给流域环境治理带来了重大挑战。排水系统的不完善导致污染加剧,大量老旧城区基础设施给雨污分流带来更大的困难,因此,迫切需要寻找能适用于原位治理的技术措施来消减污染。与传统的人工湿地技术相比,砾间接触氧化技术具有工艺效果稳定、占地小、不易堵塞、操作维护简便等优点,对CODCr、NH3-N、SS等有良好的去除效果,可以用于河道水的处理及污水处理厂尾水的深度处理。更重要的是,由于其可以全地下建造,能够充分利用河滩地、景观、公共绿地等不同性质的地块,从而具有生态和土地多重利用的特点,可以通过系统性的规划和景观设计,打造出为公众提供休闲、游憩、环境教育及体验自然水环境的公共服务设施,因此是一种具有良好前景的生态工法,可以作为流域治理中一种重要的原位治理措施。

Application of gravel contact oxidation process in watershed management

With the rapid urbanization process of China, pollution from dispersed point and non-point sources in the region causes great damage to water environment, which brings significant challenges to the water-shed environmental management. The imperfection of the drainage system aggravates the pollution, and a large number of aged infrastructures in some urban district bring more difficulties to the separate collection for rain water and sewage. Therefore, to find green infrastructure that can be applied in site to reduce the pollution is a critical issue. Compared with traditional constructed wetland technology, gravel contact oxidation process has ad-vantages of stable treatment effect, less land occupation, uneasy blocked, easy operation and maintenance, and so on, which has high removal efficiency on CODCr, ammonia nitrogen, SS, ect., and can be used for treatment of river water and advanced treatment of tail water from sewage treatment plant. More importantly, since it can be constructed totally underground, that can make full use of flood land, landscape, public green space and other land parcels with different properties, it has advantages of land ecological and multiple use. Through systematic planning, gravel contact oxidation process was adopted in landscape design, so as to provide the public with ser-vice facilities of landscape recreation, environmental education and water view etc., therefore, it is a promising green infrastucture, which can be applied for in-situ treatment in watershed management.