Study on area, operating and construction costs of urban wastewater treatment plants
城镇污水处理厂用地、运行及建设费用研究

Lots of information on urban wastewater treatment plants(WWTP) in China were collected and summarized. The relationship between scale, area, operating and construction costs of WWTP was discussed and analyzed. References are provided for the further design and planning, crafts selection,construction costs analysis of WWTPs.The study shows that area and scale of WWTP can be expressed as a function which has a high correlation. Scale and crafts selected have a great impact on operating costs of WWTP. It respectively analyzes operating costs of different crafts of small, moderate and large WWTPs. The conclusions are that the crafts in large WWTPs have a small impact on operating costs, moderate WWTPs appropriately use oxidation ditch craft, small WWTPs use SBR craft. The relationship between construction costs and scale of WWTPs is close. Because of various factors on construction costs, a case in Jiangsu and Zhejiang region was used to specificly analyze the relationship between construction costs and scale of WWTPs.