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The urban sewage treatment market is becoming saturated, however, it is still challenging to really solve the problem of rural sewage. Professor Wang Hongchen, associate dean of the Renmin University of China's Environmental Science School, believes that the most serious problem facing rural wastewater treatment technology is the current one. In Wang Hongchen's view, technology should be right, and the promotion of PPP mode should also be rational in order to really solve the problem.
Optimal rural sewage treatment technology to promote the rational management of PPP model
In the urban sewage treatment market tends to be saturated background, the rural sewage treatment market is considered to be another blue ocean blue water enterprises. Research from the E20 Institute shows that during the 13th FYP period, there will be about 140 billion rural sewage treatment market space plus construction plus five-year operating expenses. In the face of such a big market space, many enterprises already gearing up to prepare for a big fight. Most companies also pointed out that the rural sewage treatment market appears to be a delicious big cake, but really want to eat the mouth, it is difficult. In response, Professor Wang Hongchen, associate dean of the School of Environment at Renmin University of China, said in an interview that at present, there are many problems in the rural sewage treatment market and are very challenging. He believes that although there are many problems, the technical route of rural sewage treatment has deviated. This is the biggest issue at present.
Rural sewage treatment technology should be suitable for rural areas
At present, only about 10% of the country's rural areas have constructed sewage treatment facilities and less than 10% of the facilities have been built. Almost all of the rural sewage is untreated directly into the water or into the ground and becomes one of the major water pollution sources .
"There are financial problems, regulatory issues, but the biggest technical problems." Wang Hongchen believes that "the choice of rural sewage treatment technology should be to facilitate the operation of the future as the most important consideration, all inconvenient Operational, inconvenient to run in rural areas of technology, are not suitable for use. "
"As far as the operation of sewage treatment is concerned, the smaller the scale of facilities, the harder it is for it to run stably." A sewage treatment plant handling hundreds of thousands of tons a day will have a very large inertia if it runs steadily, Therefore, we must say that compared with urban sewage treatment, rural sewage treatment is more dependent on technology and more needs Technology. "Wang Hongchen said.
In recent years, Wang Hongchen has been constantly investigating rural sewage treatment in different places. He admitted that several counties often turn down and can not see one in normal operation. Some enterprises to enter this area, value engineering costs, ignoring the future operation. From the business point of view, integration, equipment, modular, intelligent, buried, these words are indeed tempting, the only way it is possible to achieve high-volume rapid construction, a large profit before; however, standing in stable operation Angle, stand in the industry point of view, why should integration? Why equipment? Why modular? Why have to buried? How to achieve intelligent? Japan's septic tanks are buried equipment, but only used in single-family, household facilities called "trough", village-level processing facilities called "station", Japan built thousands of village-level sewage treatment stations are not one Buried, why?
Wang Hongchen believes that the rural sewage treatment technology should have three basic characteristics: First, free operation, low maintenance, that is, people do not often staring at the operation, and this free operation should not be based on the premise of control, maintenance and maintenance volume should be low, which Is the rural technology must have the requirements; the second is the impact load, the quality of rural sewage water three days early in the evening, water cut off at night, high load early in the morning. Wang Hongchen pointed out that it is not clear how to deal with anti-load equipment, how can we operate stably? Third, low energy consumption, in accordance with the basic principles of conservation of mass and energy conservation, artificial aeration of aerobic treatment technology, village scale tons of water and electricity consumption must exceed 1 degree of electricity, "such a high power consumption, do not use low energy consumption technology how Row?"
Only meet the above conditions, is to adapt to rural characteristics of sustainable sewage treatment technology. After more than three years of research and demonstration, Wang Hongchen led the team to develop a circulating biological filter (WRBF?) Technology and access to national invention patents. WRBF? Technology to achieve operation-free, low maintenance, with a strong anti-water quality impact load capacity, and operating energy consumption is very low, has been in Beijing, Hubei and Inner Mongolia and other places more than 20 rural areas in stable operation.
The advance of the PPP model needs to be based on sound "ability" judgment
In order to alleviate the financial pressure and ensure the long-term stable operation of rural sewage treatment facilities, many local governments began to explore the application of the PPP model in rural environmental governance. This year, Fujian Province promulgated the "Cultivate and Develop Rural Sewage and Garbage Disposal Market Main Program", putting forward that it is necessary to attract social capital to invest in rural sewage and garbage treatment with PPP engineering packages or purchase services. Encourage to set up a city or county (city, district) as a unit, within the jurisdiction of the township sewage treatment facilities, supporting pipe network and village sewage treatment projects bundled into one or several sewage treatment package. Encourage the construction of township and village sewage projects have been commissioned to purchase services to operate.
"A healthy PPP should be rational in the first place." Wang Hongchen said that to implement the PPP model in the rural sewage treatment sector, we must clear the accounts in the early stage and find a reasonable return mechanism. Wang Hongchen introduction, there are many projects not considered in the early stage, in order to sign the contract and sign the contract. As the content of the contract is too idealistic, the result is that the phenomenon of endless wrangling and the fact that both sides of the PPP contract will be troubled by no means will never constitute a minority. Therefore, Wang Hongchen suggested that while vigorously promoting the PPP model, both parties to the contract must draw up reasonable cooperation contents within the capabilities of both parties on the premise of ensuring fair and reasonable cooperation, otherwise, they will be irresponsible and very responsible Difficult to really solve the problem of rural sewage.
"At present, China's rural sewage treatment market is not yet mature, environmental protection enterprises must be fully prepared to re-enter." Wang Hongchen bluntly, if the speculation for the purpose, or simply the pursuit of short-term effects, there is no future in the rural sewage treatment market.
(Above based on the contents of the interview)
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