On February 21, 2023, excavators and engineering vehicles shuttled back and forth at the site of the fourth-phase expansion project of Jiguanshi Sewage Treatment Plant in Nan'an District, Chongqing, and the project construction was in full swing.

Site of Phase IV Expansion Project of Jiguanshi Sewage Treatment Plant in Nan'an District, Chongqing

In recent years, with the continuous development of the central urban area, the sewage discharge volume undertaken by the Jiguanshi sewage treatment plant has also increased rapidly, mainly serving 5 districts including Shapingba District, Dadukou District, Jiulongpo District, Nan'an District, and Yuzhong District, and 13 districts. drainage basin. At present, the design scale of the first, second and third phases of the Jiguanshi sewage treatment plant is 800,000 tons/day, but the average water treatment volume has reached 938,000 tons/day in the past two years, which is already overloaded, and the fourth phase expansion project is imminent.

The expansion scale of the fourth phase will reach 400,000 tons per day. After completion, the total scale will reach 1.2 million tons per day. The processing capacity will rank among the top five in the country and the first in the west. The project is expected to be completed in 2025. According to Chen Jin, executive director of Chongqing Origin Water Construction Project Management Co., Ltd., the fourth phase of the Jiguanshi sewage treatment plant project is a key project at the municipal level in Chongqing, covering an area of 191.3 mu, with an estimated total investment of 2.298 billion yuan. Pollutant Discharge Standard "Class A Standard".

Chen Jin said that the construction of the project can not only effectively reduce the water environment pollution in the sub-basins of the central urban area and the Yangtze River, improve the ecology and investment environment, but also help realize the sustainable development of the urban economy and complete the total amount of pollutants stipulated by the state. Control requirements and promote the construction of ecological reservoir areas.

In recent years, Chongqing has continuously enhanced its urban drainage and sewage treatment capacity. At present, the total treatment capacity of Chongqing's urban domestic sewage plants has reached 5.1685 million tons per day, ranking second in the west; in addition, 820 township sewage treatment plants have been built, taking the lead in Southwest China Realize full coverage of domestic sewage treatment facilities in townships.

According to Kang Jianbin, a second-level researcher of the Municipal Housing and Urban-Rural Construction Committee, during the "14th Five-Year Plan" period, Chongqing will renovate and expand 54 urban sewage treatment plants, adding a processing capacity of more than 2.3 million tons per day to further make up for shortcomings. Enhance resilience to provide a solid guarantee for building a solid ecological barrier in the upper reaches of the Yangtze River and protecting a clear river flowing eastward. Editor / Zhao E