基于生态过滤技术的某溢流口水污染治理的研究

Research on Water Pollution Control of the Overflow Outlet Based on Ecological Filtration Technology

以某溢流口为试验对象,根据溢流口污水可生化性好的水质特点,采用基于生态过滤技术的生态滤坝试验装置构建低影响开发、低能耗的多级生态过滤模块,对溢流口污水进行原位净化处理试验。试验结果表明,溢流口污水经生态滤坝试验装置处理后,出水水质关键性指标接近或达到《GB 18918城镇污水处理厂污染物排放标准》一级A标准,可排入《GB 3838地表水环境质量标准》Ⅲ类功能水域;其中对溢流口污水中COD及SS指标的去除率可达到80%以上,TN和NH3-N指标的去除率>70%,TP指标的去除率也可达到65%以上,对溢流口水污染净化效果明显,可从源头上消减进入河流、湖泊的水污染负荷,以缓解溢流口水域富营养化态势。

For the full use of the good biodegradability characteristics of the water from overflow port sewage,an ecological filter dam device based on ecological filtration technology with the habit of low impact development and low energy consumption was designed and in-situ purification experiments were conducted at an overflow outlet.The experiment results showed that the key indicators of effluent quality were close to the first class standard of GB 18918"Pollutant Discharge Standard for Urban Sewage Treatment Plants"and could be discharged into the third class functional water area according to the standard of GB 3838"Surface Water Environmental Quality Standard"after treatment by the ecological filter dam device.The removal rate of COD and SS at the overflow outlet could reach 80%,the removal rate of TN and NH3-N was greater than 70%and the removal rate of TP can also reach 65%,which shows a significant purification effect in the whole.The ecological filtration technology could prevent the water pollution from the source and alleviate the eutrophication of overflow water.