As an important infrastructure in cities, now the building of sewage treatment plant has become one of the important measures for preventing and remedying pollution and protecting urban water environment at home and abroad. It has positive effect on ensuring the treatment of urban domestic sewage and partial industrial sewage, perfecting river and lake water body quality and controlling water environment pollution. However, with the development of urban construction and industrial park and acceleration of new area housing construction speed, the total amount of urban sewage increases day by day and the actual processing rate and level for sewage are still very low which is one of the main reasons for the severe pollution of current baisn’s rivers, lakes and reservoirs. Therefore, the planning of urban sewage treatment plant becomes the key problem for its construction and management. On the aspect of strengthening urban sewage treatment ability, the general practice is to expand and accelerate the construction of urban sewage treatment plant and pipe network supporting facilities and then enhance the effect of sewage interception and control. Most of researches at home and abroad tend to the direction of sewage treatment technology and the technological and environmental influence, and involve less research on space matching between sewage treatment plant and regional pollution control demand. Through the funding of key program of Natural Science Foundation of China, Chinese Academy of Sciences undertaken by our institute and institute’s “135” program, the research team led by associate research fellow Zhao Haixia bases on township evaluation unit and takes example of Huaian City to analyze pollution source’s spatial pattern, variation tendency and its environmental influence and sewage treatment facility’s demand, and use ArcGIS space analyzing tool to make deep research. Different from the previous researches, this research makes comprehensive consideration on the spatial relationship between sewage treatment plants, and between sewage treatment plant and sewage discharge demand, and makes deep discussion on spatial pattern optimization for urban sewage treatment facilities.

The study found that though sewage centralized treatment facilities had almost covered all the urban areas above the county level, the overall design treatment ability was insufficient. The park sewage treatment plant mainly for industrial sewage management had low load rate, but most of urban sewage treatment plants mainly for urban domestic sewage and industrial sewage management worked under high load. The villages and towns (streets) with large population and the fastest urbanization and industrialization development needed to expand, reconstruct and upgrade rebuilt facilities and strengthen regional sewage management ability; the villages and towns (streets) at the edge of urban area only needed to keep the current sewage treatment facilities and pipe network supporting facilities to meet the future demand; the villages and towns (streets) scattered in industrial enterprises cluster in industrial park and economic development zone needed to enhance the construction of sewage pipe network and the related basic supporting facilities to release the current sewage management potential. The founding of this research can provide a new visual angle for determining the scale of urban sewage treatment plant and space site selection, and provides certain theory basis for spatial optimization construction of municipal infrastructure and regional water environment protection.

Paper link:http://www.iwaponline.com/jwrd/up/jwrd2014061.htm