The ground park can rest, and the underground silent treatment of sewage Hangzhou Qige sewage treatment plant is a bit different

In Qige Community, Xiasha Street, Qiantang District, Hangzhou, there is a Qiantang Ecological Park. The park also has a number of amusement areas such as wetland flower fields, Kang Sports fitness, ecological tour, children's activities, and lawn theater.

Below the Qiantang Ecological Park, the "hidden" seven -grid sewage treatment plants fourth phase, here are 24 hours a day uninterrupted urban sewage, and the important functions of urban sewage purification.

On September 29, Hangzhou Water Affairs Group held a press conference to introduce the sewage treatment situation and process of sewage treatment plants.

"The sewage generated by thousands of households will not disappear out of thin air. Instead, it has gathered the sewage treatment plant through the underground sewage pipe network. After the sewage plant is effectively handled, it reaches the emission standard and re -returns to nature." Yan Guoqi, deputy general manager of the Water Capital Capital Purification Company, introduced that these sewage treatment plants are like the "purifier" of the city. The sewage is in, and the clear flow can greatly reduce the burden on the self -purification of the river.

According to reports, the 4th phase of the entire seven -grid sewage treatment plant covers a total area of ​​about 274 acres (the park covers an area of ​​about 160 acres), most of the facilities and equipment are buried underground, and the ground is now the Qiantang Ecological Park.

"Seven square sewage treatment plants use 'A+AAO biological treatment+nitrifying deep bed filter+ultraviolet disinfection' process with a nitrogen removal and phosphorus removal function, and the first -level standards are implemented." Yan Guoqi introduced it. It is the most important biological treatment unit in the sewage treatment plant. It mainly uses different types of microorganisms (anaerobic, hypoxia, and good oxygen microorganisms, etc.). Remove and degrade to achieve the purpose of purifying water quality.

The desertified deep bed filter is a deep treatment unit after biological treatment. The quartz sand with a thickness of 2.44m and a particle size of 2-4mm is used to remove the remaining small suspension in the sewage. After the deep bed filter is added to the carbon source (as a microbial nutrition agent) in winter, the surface of the sand particles can grow on the surface of the sand particles.

Ultraviolet disinfection is the last processing process in the sewage treatment plant. Ultraviolet rays with appropriate wavelengths to kill bacteria such as sewage, such as sewage coli, and discharge after disinfection treatment.

It is understood that at present, there are 10 sewage treatment plants operated by Hangzhou Water Affairs Group under the jurisdiction, with a design processing capacity of 1.989 million tons/day. The processing capacity is 240,000 tons/day; 2 seats in Lin'an District, with a processing capacity of 100,000 tons/day; there are 1 block in Jiande City, with a processing capacity of 49,000 tons/day.

The sewage treatment plants put into operation in the main urban area of ​​Hangzhou are seven -grid sewage treatment plants and west sewage treatment plants.

The Qiger Sewage Treatment Plant is a large sewage treatment plant, which is divided into four phases construction, with 400,000 tons/day, 200,000 tons/day, 300,000 tons/day, and 300,000 tons/day ( Below the Qiantang Ecological Park is the fourth phase of the Qige Sewage Treatment Plant), and the water out of the water is "GB18918-2002) standard A standard A standard. From January to August this year, the average daily sewage treatment volume of the two sewage plants was 1.3653 million tons, and the COD decreased displacement of 87,000 tons.

In addition, there are currently two sewage factories under construction in the main urban area, namely Zhijiang Water Purgatory (80,000 tons/day), and Chengbei Water Purgatory Plant (the first phase of the design processing capacity of 100,000 tons/day). After the two sewage plants were completed and put into operation, the sewage design and treatment capacity of Jiangbei City, Hangzhou will reach 1.78 million tons/day.

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