Constructing township sewage treatment plants cannot be done at once.
How to balance recent needs with long-term development tests people’s wisdom.
Flexible planning can avoid "surplus"
Location: Guizhou Town, Zigui County
The sewage treatment plant in Guizhou Town, Zigui County is close to the Yangtze River, with two The production line is designed to handle 3,000 tons per day.
The reporter saw that only one of the two production lines was running. "In the first 10 months of 2016, more than 440,000 tons of sewage were processed, with an average of 1,482 tons per day." Zhu Daoqing, director of the Guizhou Town Construction and Environmental Protection Center, said that the plant was officially put into operation in 2007 and has not been operating at full capacity for nearly 10 years. Pass. What it boils down to is the town's depopulation.
When originally designed, the factory was designed to accommodate 12,000 people. However, the immigration policy changed. Most of the immigrants originally planned to be resettled in the town moved out, and the town's population was smaller than expected. At present, the town has a population of 7,632.
Sewage treatment plants have been built in 7 of the 12 towns in Zigui County, sewage treatment plants in 2 towns are in trial operation, and 3 towns are yet to be built. It is expected that the entire township sewage treatment plant will be completed this year. cover. Those newly built plants have learned from past experience and their processing scale and technical paths are more realistic. "Preliminary planning for township sewage treatment plants is very important, and the treatment capacity must leave room for future development and changes." Tan Zisong, head of the village and town section of the Zigui County Housing and Urban-Rural Development Bureau, said that each local sewage treatment plant requires more than 200,000 yuan in financial subsidies every year. If you don't budget carefully, it will be a huge burden.
There is a bright future, "merger" solves the embarrassment
Location: Xionghe Town, Jiangling County
The sewage treatment plant in Xionghe Town, Jiangling County, since its completion in 2009, It has been idle for 6 years, and the equipment in the factory has been exposed to the weather and has become rusty.
In 2015, the town spent hundreds of thousands of yuan to completely renovate the treatment plant, replace it with new processes and equipment, and finally it can operate normally. The reporter saw that the factory had been renovated and the machinery and equipment were operating normally.
However, the transformation has brought new problems. The treatment plant was originally designed to have a processing capacity of 1,500 tons/day, but after the transformation of the new process, the processing capacity dropped to 500 tons/day, which can just meet the existing needs. .
Due to the demolition of the Yanjiang Industrial Park, a residential community under construction will soon be built in the town, and the amount of sewage treatment will increase. However, there is farmland to the left of the treatment plant and a school building to the right, so there is no room for expansion.
What is even more embarrassing is that Jiangling County has continued to expand in recent years, and Xionghe Town is only about 2 kilometers away from the main sewage pipe network in the new district of the county. The Jiangling County Housing and Urban-Rural Development Bureau initially plans to connect the town pipe network to the county pipe network in the future, and send sewage to the county sewage treatment plant for treatment. "The treatment capacity of the county sewage treatment plant reaches 19,000 tons per day, and the sewage in Xionghe Town is not a problem for it at all." said the relevant person in charge of the county's Housing and Urban-Rural Development Bureau.
At that time, the sewage from Xionghe Town will have a place to go. However, treatment plants that have spent huge sums of money to build and renovate are facing “layoffs”.
Adapt measures to local conditions to achieve full area coverage
Location: Liangzihu District, Ezhou City
In some villages in Liangzihu District, Ezhou, you can see some small sewage treatment stations .
Ruxiazhongwan, Maoqi Village, Donggou Town, uses the "non-powered rapid sedimentation anaerobic integrated reactor constructed wetland" technology, which can treat 10 tons of sewage every day and costs only 50,000 yuan. Build it up.
In Zhouhutanwan, Hulaiao Village, Maoshan Town, the "multi-layer microbial filter process" is used. It only costs about 0.1 yuan per ton of sewage treatment, and the effluent index reaches the Grade A standard.
These treatment stations are invested and constructed by Hubei Lianjing Water Investment Co., Ltd., and the entire plant network is integrated and operated. The Liangzihu District Government granted the company a 30-year franchise and purchased the sewage pipe network services on an annual basis.
They are all sewage treatment stations, why do they use different processes? The relevant person in charge of the company explained: “Each sewage treatment station covers different villages and bays, and the main components of sewage are also different. Measures must be tailored to local conditions and targeted.
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Since 2014, Ezhou has taken the lead in proposing and launching the construction of an integrated urban and rural sewage full collection, full treatment, and full coverage system in the province. Currently, the city has 8 urban sewage treatment plants in operation or trial operation. More than 400 sewage treatment facilities have been built in rural areas. A "four-in-one" sewage treatment system covering the main urban areas, new areas, market towns, and village bays has begun to take shape.
"With the continuous development of economy and society. , the main components of domestic sewage in towns and even villages have also changed, and one set of equipment cannot conquer the world. The construction of sewage treatment facilities in rural areas must be tailored to local conditions, including both technological means and maintenance technical strength. "The person in charge said.
Ezhou Municipal Housing and Urban-Rural Development Bureau introduced that this year the city will build 15 urban sewage treatment plants and 1,117 rural natural bay sewage treatment devices to ensure that the rural sewage treatment rate reaches more than 80%.