Through the above specific analysis of the quality and quantity characteristics of rural sewage, the comparison of treatment technology, economy and technology, and the requirements of discharge standards, the design has the following characteristics:
(1) The sewage discharged from the village is intermittent, and the water quality and quantity are unstable, so some adjustment and stabilization measures are needed.
(2) The sewage treatment process must be stable and reliable, with good treatment effect, reasonable operation cost, convenient management and maintenance, and reduce the impact of human factors on the treatment effect.
(3) The sewage of each household in the village should be treated as centrally as possible to improve efficiency, avoid decentralized treatment, increase costs and operating management costs. If the increase of investment in the pipeline network is large, the treatment point can be increased appropriately.
The discharged sewage contains more organic matter, higher concentration and higher suspended matter content. The B/C ratio of the sewage is 0.30-0.50, which has good biodegradability. At the same time, the quality of the effluent in this project is required to be high.
Therefore, from the point of view of appropriate investment scale, stable and reliable treatment effect, convenient management and maintenance, and reasonable operation cost, combined with practical experience in this kind of sewage treatment project, the specific solar micro-power treatment process is described.