Shanghai Bailonggang Sewage Treatment Plant is located in Chaoyang Village, Heqing Town, Pudong New District. It is an important part of the second phase of Shanghai's sewage treatment project.
Upgraded in September 2008 The project has been fully completed and put into operation, with a treatment capacity of 2 million cubic meters/d. It is the largest sewage treatment plant in Asia and one of the largest sewage treatment plants in the world. Its treatment capacity accounts for about 1/3 of Shanghai's urban sewage treatment capacity.
The facts behind Shanghai Bailonggang Sewage Treatment Plant are very impressive: it can treat up to 1.72 million cubic meters of sewage per day, serving a population of 3.56 million in an area of ??271.7 square kilometers. Strong growth in the Whitewater Port region necessitates doubling daily wastewater treatment capacity to 2.1 million cubic meters.
In order to meet the sewage treatment requirements with the goal of removing phosphorus and meeting the national Class II emission standards, the first step of the plan is to adopt a combined physical and chemical treatment method, and the second step is to implement an aerated biological filtration process. Due to the limited area of ??the treatment plant involved, the combined physicochemical treatment approach uses highly efficient sedimentation tanks in order to carry out the mixing, flocculation and sedimentation processes in parallel.
But by 2007, as the country further increased its emission requirements for urban sewage treatment plants, and the water volume in the Bailonggang sewage collection area was increasing, the treatment technology and treatment scale of the Bailonggang plant could no longer meet the requirements. . Therefore, the Shanghai Municipal Government decided to upgrade, expand and renovate again to improve the processing level and increase the processing capacity.
The sewage upgrading and expansion project was initiated in 2006 and completed and put into use in 2008. The Bailonggang sewage treatment plant has reached a scale of 2 million tons, with a total investment of 2.2 billion yuan, making it the largest in Asia. A sewage treatment plant with nitrogen and phosphorus removal functions. An 800,000-ton sludge treatment project was launched at the same time as the sewage treatment. This project, using part of the World Bank loan, is Asia's largest sludge digestion and drying project.
The expansion of Bailong Port makes good use of existing conditions. It first diverts 600,000 tons per day from the existing high-efficiency sedimentation tank, and then enters the newly-built biological reaction sedimentation tank. After being mixed with the effluent from the high-efficiency sedimentation tank and disinfected together, it reaches the national secondary standard for discharge water.
Compared with the previous expansion, the 2 million tons processing capacity is not only larger in scale, but also has advanced technology. It adopts a multi-mode A/A/O biological reaction sedimentation tank. Compared with the traditional mode, it can have a larger processing load and can remove nitrogen and phosphorus multiple times.
The Bailonggang Sewage Treatment Plant was renovated and upgraded to adopt the AAO biological treatment process. The sewage was upgraded from the primary enhanced treatment of 1.2 million cubic meters per day to the secondary biochemical treatment of 2 million cubic meters per day. The effluent water quality After reaching the national secondary discharge standard, it will be discharged into the Yangtze River Estuary through the deep water discharge system. The total investment of the project is 2.222 billion yuan. After completion, the sewage treated will account for 1/3 of the total sewage treatment in the central area of ??Shanghai, and the treatment capacity ranks first in Asia. , one of the world's leading single wastewater treatment plants.
Since the trial operation of the reconstruction and expansion project, the upgraded part has reduced chemical oxygen demand by 15,011 tons, and the expansion part has reduced chemical oxygen demand by 3,144 tons. Compared with the original first-level enhanced treatment process, the chemical oxygen demand has been reduced by 15,011 tons. The amount of oxygen is 5374 tons.