The graduate design project titled "Design of a New Urban Sewage Treatment Plant (150,000 m3/day) with A2/O Process" aimed to design a sewage treatment facility for the specified region. The project included the creation of a design report, a layout plan of the treatment plant, and elevation maps of sewage and sludge. The treatment plant has a capacity of 150,000 tons per day and employs the A2/O process, which consists of anaerobic, anoxic, and aerobic tanks. The anaerobic tank releases phosphorus and converts some organic matter into ammonia, the anoxic tank is responsible for denitrification, and the aerobic tank functions as a multi-purpose unit that removes BOD, nitrifies, and absorbs phosphorus.
The sewage treatment process at the plant involves pumping sewage to the grit chamber, then into the reaction tank, followed by the radial flow secondary sedimentation tank, and finally into the clear water tank before discharge. The sludge treatment process includes transferring excess sludge from the reaction tank to the sludge collection and conditioning well, pumping it to the thickening tank, then into the digestion tank, and finally into the dewatering facility for disposal. The keywords of the project are A2O, simultaneous nitrogen and phosphorus removal, and design report II.
In conclusion, the graduate design project successfully designed a sewage treatment plant using the A2/O process for the specified region, ensuring efficient and effective treatment of sewage and sludge to meet environmental standards and regulations. The detailed design report, layout plans, and elevation maps provided a comprehensive overview of the proposed treatment plant, showcasing the intricacies of each treatment stage and the flow of sewage and sludge through the facility. The project highlighted the importance of proper design and planning in the development of sewage treatment facilities to protect public health and the environment.
