Look! “Capillaries” hold up the city’s “face” in this way

The staff of

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carry out “physical examination” on the underground drainage pipes. The “face” of a city can operate normally without the support of “Lizi”. In this huge underground world, there are countless “capillaries”, which support the normal operation of the earth world. How do these “capillaries” treat urban sewage? On the 28th, the Municipal Water Affairs Bureau led representatives of the public into the special action of sewage treatment in the ring city. “I hope to take this opportunity to let the public support and understand our series of sewage treatment work around the city, and at the same time arouse our determination to cherish, protect and control water.” Municipal Water Bureau related responsible person said in the activity.

point 1

Jinjiang sewage interceptor project site

is expected to complete the


pipe jacking construction

in September

is walking on the road surface of the construction site. What you can see is a huge round pit with a diameter of 10 meters. Standing in the pit, the reporter looks down and sees a deep well leading to 18 meters underground. Sewage interceptors are working in this 18 meters deep well. When


went down to the working well, the reporter saw that the surrounding was humid and the air was thin, and the left and right sides were sewage pipes. “The diameter of the sewage pipe is 2.6m, and the pipe material is reinforced concrete pipe with groove. The buried depth of the main pipe is large, and most of the construction working faces are close to the buildings that have not been demolished, and the site does not have the conditions for open excavation, so the pipe jacking method is adopted for the construction of the whole line.” He Yulin, the owner’s representative of Chengdu Tianfu Greenway Construction Investment Co., Ltd., introduced that a total of 11.3 kilometers of Jinjiang sewage interceptor was added from Jiuyanqiao along the Jinjiang River. After completion, the sewage in the central urban area will be alleviated, and the evacuation sewage of 300000 tons per day will be increased in coordination with the second phase project of neutralization. Up to now, the pipe jacking construction has been basically completed, and it is expected to be completed in the middle and late September.


are from Chengdu University of Arts and science. LAN ene, a student from Chengdu University of Arts and Sciences, visited Jinjiang sewage interceptor and said that he was shocked. “I came from Dujiangyan. Recently, my family suffered from flood disasters during the flood season. I am very interested in the recycling process of urban water treatment. I hope you can protect water resources together.”

point 2

municipal drainage network survey site

drainage pipe “physical examination” completed by the end of the year

“buzzing…” At 4:00 p.m., the engineering vehicle like a large vacuum cleaner started working in diehua street. Reporters at the scene to see that the cart with a length of about 30 meters, diameter of about 500 mm suction pipe is to the underground drainage pipe here “pumping sewage bath”, stones, garbage are one by one sucked out. On the other side of the street, pipeline inspection workers are holding the remote control, commanding the “pipeline inspection robot” to give the underground drainage pipe “physical examination”. Zhao Da, a commentator at the survey site of


municipal drainage network, said, “the underground drainage pipe is blocked due to long-term blockage and siltation. First, we use the suction truck to clean the water supply and drainage pipe, and then use the” pipeline detection robot “to detect the internal situation of the pipeline, and finally generate a” pipeline physical examination report. ” The general survey process mainly collects the spatial data and attribute data of the drainage pipe network, finds out the pipe network diseases, and then “prescribes the medicine to the case”. At the same time, the drainage pipeline is dredged to improve the collection and transportation capacity of the municipal drainage pipeline, laying the foundation for the next major disease treatment of municipal drainage pipe network in the ring city.


it is understood that the survey covers about 7000 km of municipal drainage network within the ring city (excluding the area surrounded by the two rivers), covering an area of about 540 square kilometers, with a planned investment of 560 million yuan, to be completed by December 2020. As of August 27, 4599 km of drainage network detection, 1614 km of pretreatment and 2112 km of detection have been completed.

point 3

sewage recycling capacity of

in Chengdu No.4 reclaimed water plant upgrading


to the No.4 reclaimed water plant. Pipes of all sizes are full of workshops. How is the black sewage recycled? Reporter Haosheng inquired about it.


adopt multi-phase combined membrane bioreactor (mp-mbr). After the pretreatment facilities such as coarse grid, fine grid, aerated grit chamber and membrane grid, the wastewater enters the biochemical tank for biochemical treatment. Finally, the high-quality effluent quality is obtained through the efficient separation and further biodegradation of the membrane tank Zhang Zongyi, process manager of


, the process manager of Chengdu No.4 renewable water plant, said that the design scale of the plant is 150000 tons / day, and the current effluent quality meets the “discharge standard of water pollutants in Minjiang and Tuojiang River Basins of Sichuan Province”. The fourth reclaimed water plant has a total sewage treatment capacity of 41.67 million tons in 2019, which has made a great contribution to the improvement of water environment in Chengdu.

reporter learned that at present, the sewage treatment scale of eight reclaimed water plants in the central urban area of Chengdu is 2 million tons / day, the scale of reclaimed water utilization is 750000 tons / day, and the sludge treatment scale of two sludge treatment plants is 600 tons / day. According to the special action requirements for sewage treatment in the surrounding city, the sixth, seventh and ninth reclaimed water plants are being comprehensively promoted. After the completion of the project at the end of this year, the water will be discharged The water quality will be upgraded from grade a standard to the discharge standard of water pollutants in Minjiang and Tuojiang River Basins of Sichuan Province.

our reporter Miao Mengyu pictures

original title: Look! “Capillaries” hold up the city’s “face” and