The sewage treatment plant should be centralized treatment of sewage, the essence of the environmental protection agencies and facilities, but the emission indicators are not qualified is a common problem around, which makes the environmental protection facilities into a "source of pollution".
Huainan first water limited liability company eight Gongshan sewage treatment plant disinfection facilities are not running, outlet sampling and monitoring results show that the treatment plant drainage ammonia nitrogen 11.4mg / L, exceeding the standard 0.425 times, fecal coliform greater than 24000 / L, exceeding the standard by more than 23 times.
Anhui Province in the fourth quarter of 2013 state-controlled sewage treatment plant supervisory monitoring results also show that Bengbu City, the first sewage treatment plant, Tongling City, Xinmin Sewage Treatment Plant, Tongling City, Xihu Sewage Treatment Co., Ltd. fecal coliform emissions do not meet the standard, Huayuan County Sewage Treatment Plant, total phosphorus emissions do not meet the standard, and the county of Anhui Province and the Yangtze River Environmental Engineering Limited Liability Company, Chemical Oxygen Demand The emission of chemical demand oxygen does not meet the standard.
Wang Jiaquan, a professor at Hefei University of Technology's School of Resource and Environmental Engineering, believes the reason for this situation is that, from a technical point of view, the main reason is that the old plants were not designed, constructed, and operated according to the current Class I-A emission standards at the time of design. "For example, the most common indicator of fecal coliform bacteria needs to be discharged after the last disinfection procedure is done before discharge, but some plants either failed to meet the current standards when they were designed with disinfection facilities, or the amount of disinfectant put in is not enough, and the process or facilities are not up to the standard, which resulted in the exceedance of the emission standards." In addition, the season, management, equipment maintenance will affect the quality of sewage treatment, but also directly affect the discharge of qualified or not.
The second is the human factor, such as management is not in place, poor equipment stability, especially some human inattention led to a variety of laws and regulations, technical standards are not implemented, not implemented.
Wang Jiaquan analysis, said: "fecal coliform bacteria as an example of this indicator, the latest technology to use ozone for disinfection, but the cost is high, many sewage treatment plants in order to reduce costs, more profitable, and do not use the ozone, or to reduce the dosage, this artificially lowered standards, do not regulate the operation or do not update the technology and techniques, but also lead to the treatment of sewage does not meet the standards. The important factor."
How to solve these problems? Anhui Provincial Housing and Urban-Rural Development Department of Urban Construction Division researcher Zhang Jingyu that, first of all, is to grasp part of the early construction of sewage treatment plant upgrading, so that as soon as possible to meet the emission standards of treatment requirements.
It is reported that not only Anhui, many provinces at present, the existing sewage treatment enterprises, basically in accordance with the national level of class B standard design and construction, to meet the newly introduced emission standards that is a class A standard requirements, it is necessary to upgrading these sewage treatment plants. Relying on the existing treatment process and level, to achieve stable emission standards is very difficult.
Zhang Jingyu revealed that in recent years, Anhui has been grasping this part of the sewage treatment plant upgrading upgrading transformation, last year has completed the transformation of 18, this year, the Huaihe River, Chaohu Lake Basin, there will also be 18 for transformation. And in Hefei, 2013 has completed five old plant upgrading work, in addition to the Chaohu City sewage treatment plant is upgrading renovation project, the remaining sewage treatment plant effluent water quality has reached the level of A discharge standards.
Secondly, increase investment in sewage treatment plants and supporting pipe networks, upgrading and renovation works, rationalize the operating mechanism, and develop a reasonable profit margin. The reporter learned that, at present, the construction of sewage treatment plants are broadly divided into: government investment or government and social capital *** with investment in government investment, the central financial subsidies gradually compressed, mainly relying on the local government; operations are broadly divided into the government's own operation, construction companies operating, or the government through the bidding commissioned by a professional company operations.
In this regard, the industry suggested that to ensure the healthy development of sewage treatment plants, "keep pace with urbanization", first of all, to solve the problem of insufficient funds for construction; second, to rationalize the operation of sewage treatment plants to ensure that the funds are earmarked to ensure that their normal operation; third, in attracting social capital investment, operation, it is important to To clarify a reasonable profit range, both through a reasonable profit space to attract funds, but also to ensure that the profit is reasonable and controllable.
At the same time, a strict accountability mechanism should be established to increase penalties for exceeding the discharge of sewage treatment plants. Wang Jiaquan said the first step is to improve regulation. It can be said that purely from a technical point of view has been completely non-existent sewage treatment does not meet the standards of the possibility, only to improve the supervision, to ensure that a variety of standards into practice, improve the management level of sewage treatment plants, standardization, in order to fundamentally eliminate the problem of sewage treatment does not meet the standards.
Wang Jiaquan believes that, because most of the current sewage treatment plants are to sewage treatment volume to obtain returns, in addition to regulatory penalties, to prompt the sewage treatment plant to take the initiative to study the technology, improve the process, and strengthen the management of the lack of feasible "incentives". To this end, he suggested that the sewage trading system and platform should be improved as soon as possible to make the trading of sewage rights smoother.
"When the treatment capacity and quality of sewage treatment plants continue to improve, and the difference between the permitted emissions and the actual emissions can be through the sewage rights trading to obtain the actual benefits, sewage treatment plants will fundamentally get power, but also better reflect the value of environmental resources."