The sewage treatment process is shown in Appendix XI: Block Diagram of Membrane Process Central Island Oxidation Ditch Process Flow. The main sections of the installation project include pre-treatment section (coarse screen, sewage lift pump room, fine screen, bell type grit chamber, etc.), membrane process central island oxidation ditch, contact filter, blower room, sludge treatment section (sludge thickener, sludge dewatering room, etc.), complex building, machine repair room, etc