Abstract
The graduation project is for a municipal wastewater treatment plant, the proposed size is about 20000 tons per day. The contents of the project contain sewage treatment process, general diagram and construction works. Process requires not only reduce the BOD, COD, SS but also lower N elements concentration, so we choice the SBR process to make the outlet meet the first order A standard. This process flow is very easy, cost is small, operation and management is convenient. The main structures are stratospheric grit removal tank, SBR reactor，sludge thickening pool and so on.At last, we draw the general site plan, ground level, construction works layout and section according to the calculation sheet.
Key words: Wastewater treatment; SBR, Construction works
