Environment problem is increasingly serious, pollutions of water, atmosphere, soil, solid waste and noise are increasingly serious and salience, the government has issued corresponding policy. With the 12th five-year planning implementation and adjustments of the national industrial structure and economic structure, environmental governance has becomes more and more urgent. In the field of environment there are more and more crisis and opportunities. Environmental industry is certainly a long long field. 

When developing environmental protection in our country the sewage disposal is firstly a major focus areas, which includes nitrogen and phosphorus, old sewage treatment plants upgradings, small and medium-sized cities sewage treatment plant construction and industrial wastewater treatment, etc. Our nation makes a layout and investment from six aspects in the environmental protection industry, one of the major aspects is total pollutant emissions including the main pollutant ammonia nitrogen emissions. During"Twelfth five-year" period, the country continues to promote chemical oxygen demand (COD) and sulfur dioxide (SO2) of pollution reduction simultaneously , put the new ammonia (NH3 - N) and nitrogen oxides (NOx) as binding forces. At the same time, the heavy metal, soil pollution, remobilised (persistent organic pollutants (POPS), hazardous waste, dangerous chemicals, the rural non-point source pollution control, VOCs pollution prevention and control of contamination are done as the key point of pollution control field.