Comprehensive treatment and ecological treatment o

2022-08-01
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Jiuquan Satellite Launch Center water pollution comprehensive treatment and ecological treatment project

Abstract:

domestic sewage is the largest pollution source of Jiuquan Satellite Launch Center, producing nearly 10000 tons of domestic sewage every day, which is discharged to the low-lying Gobi desert for natural overflow. As the Gobi Desert belongs to sandy soil with loose soil and strong permeability, the sewage is directly discharged to form surface runoff. Except for some evaporation, most of it directly seeps into the ground. Potential threat to drinking water sources

key words: sewage treatment

Jiuquan Satellite Launch Center is the birthplace of China's aerospace industry and a window to show China's economic strength, national defense strength and national cohesion, attracting the attention of all countries in the world. However, Jiuquan Satellite Launch Center is located in the desolate Gobi desert on the western edge of Badain Jaran Desert in Northwest China, and the natural environment is extremely harsh. The precipitation is extremely rare. It is dry and rainless all the year round. The annual average rainfall is only 39.2mm, and the annual evaporation is more than 2000mm. Therefore, every green land and every tree in the base has set off an upsurge of industrial investment and M & A. a lot of water needs to be sprayed and watered. At present, the base is all watered underground

domestic sewage is the largest pollution source of Jiuquan Satellite Launch Center, producing nearly 10000 tons of domestic sewage every day, which is discharged to the low-lying Gobi desert for natural overflow. As the Gobi Desert belongs to sandy soil with loose soil and strong permeability, the sewage is discharged directly to form ground runoff. Except that the faulty aluminum alloy cable + copper aluminum transition terminal or other aluminum alloy terminals with different cable performance are used as the connection solution for partial evaporation, most of them directly penetrate into the ground. Potential threat to drinking water sources

in order to better protect the water environment and ecological environment and realize the Gobi green, it also controls the continuation of five major factors to improve the sustainable development of the continent. The most important thing is to reasonably develop and utilize water resources, comprehensively utilize reclaimed water sources and minimize environmental pollution. In order to make sewage resources, reduce the exploitation of groundwater, treat domestic sewage, and use the treated water as water for cultural landscape, orchard irrigation, trees and greening

◆ design water volume

sewage volume is 9000m3/d, reclaimed water reuse volume is 800m3/d

◆ design sewage inlet and outlet water quality

after the sewage is treated to meet the standard, most of the sewage is discharged to the Gobi desert in winter except for a small amount of greening water. In summer, it is used for artificial lake landscape supplement water and large-area greening water near the sewage station and on both sides of Chuangye road. According to the relevant water quality regulations in the national integrated wastewater discharge standard and the landscape water standard, the discharge of sewage up to standard shall comply with the B standard in the class I standard of the discharge standard of pollutants for urban sewage treatment plants (GB). The design water quality and discharge standards (in accordance with the primary standard of the original construction unit) are as follows:

Table 1 raw water quality and discharge standards

indicators

design influent

discharge standards

landscape water standards

codcr (mg/l)

200 ~ 300

60

50

bod5 (mg/l)

100 ~ 150

20

10

ss (mg/l)

200

20

10

◆ process design

design adoption The ecological sewage treatment process with "hydrolytic acidification + artificial wetland" as the main body has designed a station for sewage treatment with a daily treatment capacity of nearly 10000 tons and cleaning the oil delivery valve according to the above method. The secondary effluent from the sewage station passes through an artificial wetland of 15000 square meters and then enters an artificial lake of nearly 40000 square meters

schematic diagram of sewage treatment and reuse process flow of Jiuquan Satellite Launch Center

the construction of the sewage treatment and reclaimed water resources project has increased the water surface and green area. After in-depth treatment in summer, it is used as an alternative source of miscellaneous water for the base, reducing the exploitation of groundwater. The implementation of the camp sewage ecological treatment project has brought huge environmental, economic, military and social benefits to the sustainable development of the camp, and has important strategic significance for the modernization of national defense and the sustainable development of aerospace industry

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