一级与二级城市污水处理费用比较

为比较并评判城市污水一级处理与二级处理技术的优劣 ,采用去除单位数量的有机污染物和悬浮物所需基建费用和运行费用作为衡量处理优劣的指标 ,将问题抽象为数学问题。无论是基建费用还是运行维护费用 ,去除同样数量的有机污染物或悬浮物 ,二级处理均优于一级处理 ,并且一级处理与二级处理运行维护费用之比与处理规模呈负相关。在中国目前的经济水平和环境形势下 ,集中有限资金 ,优先发展二级处理技术 ,更有利于削减污染物总量 ,防治水污染。

Primary and secondary municipal wastewater treatment cost comparison

This paper analyzes whether primary treatment techniques are better than secondary techniques for treating municipal wastewater. The analysis mathematically models the costs of removing certain amounts of organic pollutants and suspended solids as criteria. The results show compared with secondary treatment, primary treatment has no advantage in the cost of removing certain amounts of organic pollutants and suspended solids and that the ratio of operation and mainterance costs for primary and secondary treatments correlates negatively with treatment scales. Therefore, considering the economic level and the environmental state of China, secondary treatment techniques are more reasonable for removing more pollutants and eliminating water pollution.