Dilemma of rural sewage treatment technology innovation as a breakthrough point

China's rural sewage treatment is now facing the technology and demand can not match the V Ti often 刂 刂 chat room? Night S S Rose Huan Huan 虿 home 虿 Huang? R Chen Chen can fatigue? ㄓ fierce gorges Gap fear 绱 逯 Wei Cave quality burden?

Dilemma of rural sewage treatment technology innovation as a breakthrough point

China's rural sewage treatment is a trillion-level big cake. However, the huge data of over 600,000 administrative villages and more than 2.5 million natural villages in our country mean the complexity and variety of governance conditions. Therefore, how to choose and match the local sewage treatment is an effective sewage treatment technology in rural areas in China before the key problems.

Professor Wang Hongchen, vice president of the School of the Environment at Renmin University, once pointed out that there are many problems of pollution control in rural areas, but the biggest one is technology. Regardless of whether it is a rigid model of urban sewage treatment, the single consideration of investment costs or the neglect of the "soil and water" adaptability of technologies and equipment all lead to the very different effects of current rural domestic sewage treatment modes and technological process effects. This is what Professor Wang Hongchen pointed out. The premise of selection is to consider synthetically and suit local measures to ensure the effectiveness of domestic sewage treatment in rural areas.

Not only is Professor Wang Hongchen holding this view, Peking University Environmental Science and Engineering nationality nationality professor also made the same opinion. Professor Ji Guodong believes that the key reason why the effect of rural sewage treatment is always insignificant lies in the mismatch between technical effects and supporting economic inputs. Low technological content can not solve the problem of effectiveness, leading to over-contradictions in economic burdens due to advanced technologies, both of which have constrained the effectiveness of rural sewage treatment. Therefore, according to the conclusion of the country, "It is very important to tailor the rural sewage treatment technology market."

This statement is not without basis. Looking at the commonly used rural sewage treatment technologies in our country, we can find that any single technical model can not meet the needs of the complex and ever-changing rural environment in our country.

The constructed wetland wastewater treatment technology has achieved good results in many countries. However, the existing artificial wetland wastewater treatment system in China is mainly of subsurface flow type. Since there is no dynamic aeration, the oxygen solubility in water is very low and the diffusion rate is small for Oxygen capacity is poor; underground infiltration sewage treatment technology as North America, Australia and other places of choice for wastewater treatment, its superiority goes without saying. However, due to a series of reasons, such as design, soil type, effect of underground infiltration system, etc., this technology is difficult to popularize in China.

In addition to these two technologies, as well as Stabilization Pond technology, they also face the problem of large footprint and heavy climate impact. In addition, biological contact oxidation solves the problem of floor space while simultaneously having high energy consumption and complicated management and maintenance As well as the difficulties in removing total nitrogen and total phosphorus. The FILTER wastewater treatment system can not be completely applied to rural sewage treatment in our country. Although the combination process does have its flexibility, from the construction to Run and then to maintain the high cost is an indisputable fact.

To sum up, the traditional or learn from overseas success model of rural sewage treatment technology are inevitably appear in the suitability of "acclimatized" situation. On the other hand, China's rural sewage treatment technology innovation is also slightly slower pace.

Ji Guodong pointed out that at this stage of rural sewage treatment is still in its infancy, the market is growing trend, the technical innovation has been neglected. Many so-called "new" technologies on the market have not yet touched on breakthroughs in core areas. The core technology research and development under the competition in the capital market has not yet made a full effort. However, under the general trend of capitalization and development, the iteration of core technologies can not be avoided and the market pressure is gradually rising and the technological innovation is expected to accelerate.

Technical development is still not enough to completely solve the problem of rural sewage treatment, without the development of light without planning and guidance will make pollution control into a passive deadlock. That is to say, after having the weapon, people who teach the hand holding a weapon learn to use it. Although the dilemma of rural sewage treatment in our country does not have sufficient technical support, it does not exclude the lack of application of technical guidance. In this context, the progress of sewage treatment in rural areas only see the increase in facilities, but do not see the expected effects of governance are also followed.

Of course, the problem of unsatisfactory rural sewage treatment has also been exposed and the country has taken it seriously. In April this year, the Department of Housing and Urban-Rural Standards Department issued a circular on the solicitation of the national standard "Rural Domestic Sewage Treatment Facility Technical Standard (draft)" opinion, the purpose is to regulate the design of rural sewage treatment, construction and operation Management, based on the combination of local conditions, the positive and prudent and reliable use of technology, materials and equipment.

Trillion-level market for rural sewage treatment is not suitable for simple and crude "one size fits all", and the entry barrier of enterprises seems low but high. This is not easy to eat a cake in his mouth, only the technical equipment at both ends of the planning effect of double standards in order to get the rural sewage treatment market of all ages.

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