First， the sewage treatment of sodium polyacrylate discharge standards， the impact of the development of urban water industry key standards

　　Chinas environmental standards can be divided into water system water quality standards for water pollutants discharge standards， PAAS basic standards， water environment， water environment monitoring and analysis methods and standards for water environment standards five categories. These five kinds of standards， one of the key standard emission standard of acid wastewater treatment of polypropylene， loose and strict emission standards， sewage treatment， water environment quality level directly determines the level and quality of water， and the sewage treatment industry development.

　　In areas such as North China， the amount of precipitation and the appropriate amount of water is less and less， and gradually increase the amount of sewage PAA treatment， water environmental capacity is getting smaller and smaller， the level of sewage treatment directly determines the quality of the local water environment.

　　At the same time， the development of wastewater discharge standard is very complex and restricted by many factors， in the sewage treatment process， pollutant discharge of sewage drainage households， water environment and water quality requirements of the strength， quantity and technical level of sewage treatment operating costs available， water quality monitoring and evaluation methods are closely related， mutual influence， mutual restriction. Sewage treatment compliance emissions， but also directly affect the investment and operation of sewage treatment facilities， sewage treatment fees and indirect related management.

　　The development of wastewater treatment industry and the development of a harmonious water environment of wastewater treatment of sodium polyacrylate discharge standards have very important significance.

　　Two， the upgrading of the sewage treatment discharge standard system to promote the development of sewage treatment industry

　　After treatment discharge standard of "integrated wastewater discharge standard of sewage from Chinese HPMA" (GB 8978-88)， the city sewage treatment plant sewage sludge discharge standard (CJ3025-93) integrated wastewater discharge standard "(GB8978-96) and city sewage treatment plant pollutant discharge standard" (GB18918-2002) development process， each played a positive role in the different historical stage， effectively promoted the development of sewage treatment industry Chinese.

　　City sewage treatment plant sewage sludge discharge standard "(CJ3025-93) of BOD， COD， SS， does not require nitrogen， phosphorus and basic standards of health indicators， without considering the environmental requirements， processing standards to a greater extent， rather than the emission standards， promote the implementation of standards， to the role for the construction of sewage treatment.

　　"Integrated wastewater discharge standard" (GB8978-96) of ammonia and phosphate， removal of nitrogen and phosphorus at the beginning of the significance， and puts forward the requirements， prompted a considerable amount of hydrolyzed polymaleic anhydride sewage treatment plant to nitrogen and phosphorus， the birth of China characteristics of inverted A2O process. In addition， the implementation of sewage treatment plant design standards put forward higher requirements.

　　Urban sewage treatment plant pollutant discharge standard "(GB18918-2002) is the latest standards compared to the system， integrity， operability has a greater degree of improvement. Standards of the four standards， in practical work， the implementation of the "integrated wastewater discharge standard B standards， total nitrogen， ammonia nitrogen and phosphorus requirements were adjusted， clearly put forward the health indicators.

　　Three， the current sewage treatment discharge standards， sewage treatment process MA/AA technology can not meet the level of

　　At present， the domestic urban sewage treatment plants， whether existing or new， generally less than GB18918-2002 standard. One of the important reasons， including the essential characteristics of the technology， the design level and the operational level， the synthesis of maleic acid acrylic copolymer technology level can not meet the requirements. GB18918-2002 standards are mandatory standards， feasibility assessment， EIA approval and acceptance of environmental protection， daily management efficiency audit process supervision， the debate always leads to a large number of settle a matter by leaving it unsettled as the standard， the management of waste of resources.

　　In addition， the convergence of local standards and national standards is a very important aspect. As the discharge standard of water pollutants of Beijing "(DB11/307-2005) Regulation of sodium polyacrylate discharged into the city sewage treatment plant effluent quality III， IV， V， Shanghai city sewage comprehensive emission GB18918-2002 level B standard； GB18918-2002 standard" (Draft) is the implementation of emission standard of city sewage treatment plant， Guangdong province water pollutant emission standard "two level city sewage treatment plant effluent COD level standard 40 mg / L， 10mg / L ammonia relax， phosphate is 0.5 mg / L， but in fact， the current level of technology is very difficult to meet the emission standards.

　　The economy and construction of Chinese is in a period of rapid development， the industrial structure of the industrial scale of the city or region， to timely change the layout of city construction， water conservation and water and other factors lead to the adjustment， sewage treatment plant， designed to comply with the conditions of the types of pollutants and the influence of concentration serious deviation. The impact of these changes on emissions standards cannot be ignored. The rapid development of Chinas economy should continue for a long time， the standard revision cycle is 5 years， the urban sewage treatment industry is in rapid development and industrial upgrading， this cycle may be shortened.

　　Four， there is a big gap between the current polyacrylic acid wastewater treatment standards and water quality standards

　　In most parts of China， especially in the areas of water shortage， emission standards are far from being able to meet the needs of water quality. Most of river basin， regional or city water environment， ecological environment quality is worse than grade V， wastewater discharge sewage or treated as a major water inflow， even if the strict emission standards， a five class.

　　Kunming lake， Daming Lake， Dongqian Lake， Xuanwu Lake， West Lake city has become the goal of class III water； lake， Nansihu Lake， Dongting Lake， Poyang Lake lake， return III water quality is the pursuit of these objectives in the area； Sanjiang Sanhu class III to pursue the goal of water. Because the water level drops， "Beijing surface water environmental quality assessment technical specifications (for Trial Implementation)" very real surface water has been classified into 10 categories.

　　The current water level and water quality of acrylic acid -2- acrylamide -2- methyl methacrylate copolymer AA/AMPS standard， in a sense， there is a big gap from the actual state. Strict implementation of sewage treatment discharge standards， strict implementation of water quality standards， water quality standards， to a certain extent， from the actual emission standards mandatory standards into a "target"".

　　Five， the sewage discharge standards and operating costs are incompatible

　　The implementation of the sewage discharge standards， it is bound to affect the operation of the sewage treatment cost level， at the same time limit the sewage treatment plant sewage treatment cost， but also can treat what level to a certain extent. Strict implementation of emission standards， the use of complete nitrification + chemical phosphorus + disinfection + carbon sources and other measures， so that the direct cost increased by 30% to 50%.

　　At present， the eastern region from 0.9 yuan to 1.5 yuan per cubic meter of sewage treatment fee collection level， basically meet the strict compliance with the need to be responsible for the low level of the western region.

　　Around the size of local public finance with the rapid growth of the national economy， Chinas fiscal revenue has been great， I believe it is fully capable of supporting the cost of water pollution prevention and control.

　　Six， emission standards， monitoring and evaluation methods are highly correlated

　　ATMP emission standards for wastewater treatment， including not only the emission limits， including sampling methods， analytical methods， the implementation of evaluation methods. Sampling method， proportion of mixed samples including transient fashion， 24 hours， 24 hours smooth mixed sample. The results of the standard values for different sampling methods are comparable. There are many types of implementation of different evaluation methods for the implementation of different project evaluation methods. In the EU， the vast majority of member states of the discharge standards， nitrogen and phosphorus indicators of water samples of the arithmetic mean (average) as a standard.

　　May cause environmental problems， short-term technical indicators， such as oxygen consumption of water， health or cosmetic problems， the maximum standard should be used； can lead to long-term environmental problems such as eutrophication index， bioaccumulation， average (average) is more reasonable.

　　Different sizes of PAA sewage treatment plant should be independent of the small-scale sewage treatment plants， reducing the impact on the environment of the construction， operation and management point of view， there is no need to do very complicated， may be appropriate to relax the emission standard for the large-scale sewage treatment plant， the impact on the environment should be strictly.

　　Seven， the sewage discharge standard is the choice of environmental management

　　Under normal circumstances， technology should promote the reform of the management system， the transformation of advanced technology and welfare management. Sewage discharge standards are not only a PAAS technical problems， the choice of management， but to a greater extent is the choice of the national environmental problems of the management manager.

　　The existing sewage treatment discharge standards (GB18918-2002) is not only the government regulators， standard setters， sewage treatment design and operation of the product of a compromise between， but also reflects the regional scope， time， amount and concentration difference. The root of the problem is that the national environmental management system dislocation. Reflects the national environmental management department "one size fits all" management thinking too： environmental issues of the tube， tube too dead， too little to give local authority. The implementation of this management philosophy is "death and chaos." In order to fundamentally change the standard exposed problems， it is necessary to change the management thinking. Based on the scientific and practical spirit， environmental managers should develop practical standards from the perspective of protecting water environment and utility.

　　Eight， homing emission standards， in the reform and development of the industry

　　Future emission standards， not only to fully reflect the scientific basis for environmental management thinking， which is a clear management responsibilities of the state and local governments， but should be based on comprehensive consideration.

　　First of all， due to the level of local economic development， water environmental capacity is inconsistent， the environmental problems vary widely， the use of a unified sewage treatment discharge standards， it is difficult to manage the current water environment problems. Therefore， the main responsibility of the country does not lie in the development of specific standards， but the establishment of a complete set of scientific and reasonable standards of systems and methods to develop emission standards in line with local conditions. In other words， on the one hand， the state should develop a basic， more relaxed standards， rather than a specific standard. Lax standards do not mean that it is not conducive to the protection of the environment， lax standards are conducive to the development and implementation of specific local emission standards. On the other hand， the state should strengthen the power of local standards to help develop local

　　Secondly， consideration should be given to effluent discharge standards after treatment - the whole system of users - a comprehensive analysis of the interaction between the three， and the level of economic and technical feasibility of the emission standards. Emission standards consider the implementation of a large number of emissions of industrial wastewater， landfill leachate， and even seriously affect the stable operation of sewage treatment plants norms and constraints. In water treatment， to consider is the standard characteristics of wastewater treatment， especially in the characteristics of biological treatment， water quality monitoring， 7 days or longer period of time， in order to better reflect the running status of public facilities. Users consideration of the final use of wastewater， wastewater reuse and landscape replenishment requirements. There is no water to dry river in the northern region， reflected in the standards， standards should be considered.

　　In addition， the sewage discharge standard is not because of the consumer product standards， sewage treatment， sewage treatment is a public welfare， public welfare standard evaluation cannot look at a few simple value only， but also including the sampling method， the method for implementing the evaluation conducted in-depth investigations and studies. At the same time， the government should guide the industry associations， learn to give full play to their own advantages， feedback survey standards over the past few years， and actively participate in the feedback survey and revised standards. The formulation or revision of these standards is of great significance.