On October 24th, the Ministry of Finance of No. 3, Sanlihe South Lane, Xicheng District, Beijing, 2018, the city black odor water treatment demonstration city competition review meeting is being held here. After a fierce defense, Qingdao City emerged from 60 declared cities and successfully entered the final 20 national black and odor water treatment demonstration cities.
Qingdao was able to be short-listed and related to the initial results of the treatment of black and odorous water. On October 22nd, in the 2018 report on the special inspection work of urban black and odor water remediation, Wang Luming, deputy mayor of Qingdao, said that as early as 2017, Qingdao successfully completed the “basic elimination†of 12 black and odorous water bodies in the urban area. task. In July this year, the Ministry of Environment and the Ministry of Housing and Urban-Rural Development jointly conducted a special inspection of black and odorous water bodies in Qingdao. The results showed that the black odor water removal rate in Qingdao reached 100%.
In recent years, the construction of sewage treatment facilities in Qingdao has been very strong. A series of projects such as Zhangcunhe Water Purification Plant and Licunhe Wastewater Treatment Plant have been carried out in succession. The sewage treatment capacity will be increased by 300,000 tons/day. The Licun River Basin completed the reconstruction of rain and sewage in 29 urban villages along the line, and accumulated drainage pipelines for 300 kilometers. In addition to these “compulsory coursesâ€, Qingdao also implemented ecological restoration of conditional rivers to increase planting and greening. And other projects.
"We have strengthened the management level of river maintenance and strictly implemented the requirements of the 'river system'. The river chiefs at all levels regularly carry out river patrol operations and adhere to the normalized daily patrol system." Wang Luming said, "In order to rely on the former command, it also puts black. The Stinky Water Management Office also moved to the vicinity of the river."
According to third-party assessments, more than 1,200 public surveys showed that the average public satisfaction with Qingdao's black and odorous water treatment reached more than 95%.
Centennial "Li Cun Daji" moved away
Qingdao's terrain is back to the sea and there are convenient sewage conditions. The rainwater and sewage diversion network laid by the German colonists in the old city when the city was built more than 100 years ago also laid a good foundation for the city. The locals even joked that the rain and sewage diversion system in Qingdao was brought from the “motherhoodâ€.
However, outside the old city, especially in the urban villages and urban-rural junctions of the Licun River Basin, the rain and sewage mixed flow has caused many problems, such as river garbage everywhere, sewage cross-flow, stinking and so on.
After a three-year renovation, on October 27th, near the Baolong City Square in the middle section of the Licun River, the black stinking water body inspection team saw that the water quality of the river was relatively clear and there was no past smell. The water is covered with green plants, the breeze is blowing, and the garbage floats are basically invisible.
“Licun River is the mother river of the city center of Qingdao, with a total length of 17 kilometers, of which 3 kilometers in the middle reaches is located in the middle of the major commercial districts, which is the center of the renovation of the old village. In such a city, it is difficult to rule the river. Very large, we invested a total of 390 million yuan and made three major events." A staff member of the Qingdao Lisong District Government said.
Li Cunhe
The first is pollution control. The biggest difficulty is the complete interception. Starting from 2015, the local authorities frequently searched for various sources of pollution within 2 km along the middle reaches of the Licun River to see which branches were connected to the rainwater pipe network, and which merchants were still in disorder. Due to historical reasons, the rain and sewage system here is complicated, and the source of pollution has changed from 31 in 2015 to 41 in 2016 and now to 95. Up to now, the local authorities are still dynamically monitoring more than a dozen culverts and more than 20 gullies near the Licun River.
"In combination with law enforcement and supervision, we have also stepped up publicity and called on the masses in the Lishui District to help monitor the rivers and stop the discharge and dumping of garbage into the river. Now few residents have thrown garbage into the river." The staff said.
The second is to relocate the Li Village. Founded in 1892, Li Cun Daji is a large collection with a history of 100 years. In the past, before the rectification of the Licun River, there was no water in the river. The surrounding people would come to the dried rivers of the Licun River on the 2nd and 7th of the lunar calendar. It caused a lot of hidden dangers. Once it rained, the river was often full of debris that was too late to be taken away.
“In the second half of 2015, the Lishui District Party Committee and the District Government made a determination. After extensive investigation, a new Li Village Grand Collection was rebuilt on Qingshan Road, and 892 fixed booths and more than 1,000 mobile vendors were relocated to the new In this way, the cultural heritage has been preserved, and at the same time, the flood control, pollution control, fire protection and other hidden dangers of the river channel have been solved, which provides a prerequisite for the governance of the Licun River,†said the staff member.
The third is to build a sponge city. The first phase of the reconstruction of the middle reaches of the Licun River is to control pollution and water storage. The second phase is to build a river landscape and a sponge city. Through ecological water supply, the river can also be “lived†during the dry season, realizing “water rejuvenation, watermark pergola†The three themes of Shuiyun Ya City.
The water is clear, the landscape is good, and it can bring economic benefits. The Lisong Baolong International Community, which is adjacent to Licunhe River, was built at the price of 6,000 yuan/level when it was completed in 2013. At that time, residents did not dare to open windows in the summer. Now the house price is already 18,000 yuan/flat, which has doubled.
“Moving the office near the riverâ€
Although Qingdao is located on the coast of the Yellow Sea, it is a city with severe water shortages. More than 95% of the water comes from the Yangtze and Yellow Rivers. In the past, during the dry season, there was no water in the river, let alone the landscape.
In February of this year, Qingdao City began to promote the reclaimed water replenishment and storage project in the lower reaches of the Licun River. It is the use of pipelines to transport the reclaimed water treated by the Licunhe Wastewater Treatment Plant near the seaport to the Licun River, which is about 5 kilometers upstream. The triangle is replenished to the river to enhance the natural ecological environment of the river.
Specifically, the project includes a 150,000-ton/day water pumping station, a 4.6-km DN200 water pipeline, a 5.3-kilometre DN800 water pipeline, a water quality monitoring system, and a water replenishment point along the line. At present, the two water pipelines have all been completed, and the water replenishment capacity of 200,000 tons/day can be achieved. From the completion of the project, more than 11 million tons of water have been replenished to the Licun River.
“The two water pipelines cost more than one billion yuan. Construction began in February and was completed in June. The effluent water quality can reach 0.3-0.4mg/L of ammonia nitrogen, which is the 'quasi-four water quality'.†Qingdao Water Group A person in charge of the company said.
In addition, six water replenishment points have been reserved along the two water pipelines to facilitate the use of water for greening and road cleaning on the banks of the Licun River.
According to the plan, after the completion of the fourth phase expansion and upgrading project of Licunhe Wastewater Treatment Plant, the treatment capacity will reach 300,000 tons/day. The 300,000 tons of reclaimed water is distributed in this way: 20,000 tons of self-use in the factory, 30,000 tons for Datang Thermal Power, 50,000 tons for other greening and miscellaneous water, 150,000 tons for the Licun River triangle, and 50,000 Tons are used for tributaries and watering along the river landscape.
"In addition to hydration, the Licun River is also planted with 13 square kilometers of aquatic iris, lyrics, yellow iris, ryegrass, etc., combined with the construction of sponge city, 35,000 square meters of greening renovation, and 2 new ecological floating islands." The person in charge of the above-mentioned water company said, “The biodiversity of the Licun River Basin is now more abundant. Some waterbirds such as wild ducks and egrets have returned, and there are more people fishing.â€
Next, the municipal government plans to build a 360-square-meter “Licun River River Transport Management Center†on the other side of the Licunhe Wastewater Treatment Plant, which will be led by the Municipal Construction Committee, including environmental protection, urban management, and water companies. The online monitoring and joint dispatching of the water quality section of the Licun River will further enhance the water ecological environment of the Licun River. This is what Wang Luming, deputy mayor of Qingdao, said, “moving the black and odorous water treatment office to the vicinity of the river.â€
“From 2018 to 2020, Qingdao will implement 47 urban river improvement projects involving 46 urban rivers such as Licun River, Hudao River, Changle River and Ink River. This year, 23 projects are planned to be completed. Renovate the river course to more than 30 kilometers," Wang Luming said.
Responsible editor: Miao
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