东莞市城镇污水处理提质增效潜力分析

近年来,东莞市加快城市生活污水收集处理系统“提质增效”,全面提升污水处理能力。根据东莞市部分城镇污水处理厂和污水管网运行的实际情况,测算污水处理厂提标到准Ⅳ类水和完善截污管网两种情形下的污染物削减量提升潜力,并对污水处理提质增效经济效益进行分析。结果表明,若将城镇污水处理厂出水全部提标到准Ⅳ类,新增COD、氨氮削减量可分别达到1715.05、125.73 t/a,若推动东莞市污水管网全覆盖以及老旧污水管网改造和修复改善,则新增COD、氨氮削减量分别为56570.99、11056.60 t/a。因此,提升污水管网收集处理能力比污水处理厂全部提标的效果更显著,同时提出污水处理提质增效中“厂网并重”“厂网一体”和“智慧厂网”三方面建议,以科学持续地提升东莞市污水处理效能。

Potential Analysis of Quality and Efficiency Improvement of Municipal Wastewater Treatment in Dongguan

In recent years,the quality and efficiency improvement of the collection and treatment system of municipal wastewater was accelerated in Dongguan,and the wastewater treatment capacity was comprehensively enhanced.According to the actual operation situation of some municipal wastewater treatment plants and wastewater networks in Dongguan,this paper calculated the potential of pollutant reduction under the conditions of upgrading standard to quasi-Ⅳ and improving wastewater networks,and then also analyzed the economic benefits of quality and efficiency improvement of wastewater treatment.The results were as follows:If the effluent standard of municipal wastewater treatment plants were all upgraded to the quasi-Ⅳ standard,the COD and NH3-N reduction capacity could be increased by 1715.05 t/a and 125.73 t/a,respectively;if the full coverage of the wastewater networks in Dongguan and repair of the old drainage networks were promoted,the COD and NH3-N reduction capacity could be increased by 56570.99 t/a and 11056.60 t/a,respectively.Thus,the improvement effect on the collection and treatment capacity of wastewater networks was more significant than that of the municipal wastewater treatment plants.At the same time,this paper presented three relevant suggestions including equal importance,synchronous operation and automated management of wastewater treatment plants and networks in order to scientifically and steadily improve the wastewater treatment performance in Dongguan.