Study On Pollution Discharge Permit Management Of Livestock And Poultry Breeding Industry

China's livestock and poultry breeding industry continues to develop in the direction of large-scale,large-scale breeding leads to large and concentrated fecal pollution,which is directly discharged without treatment and utilization,resulting in serious air,soil and water pollution.Discharge license system as our country environment management is the most basic system,in 2016,the state council issued "the control of pollutants emission permits system implementation plan",then the environmental protection department issued "notice about pollution discharge license management interim provisions",notice the key content of pollution discharge license system reform and train of thought,and then print "discharge permit management approach(trial)",asked the stationary sources of pollution emission permits classification management list(2017 edition)"in the industry enterprises,in 2020 to complete the corresponding discharge permit the issuance of work,and on the list of category management of livestock and poultry breeding industry.This article mainly from livestock and poultry breeding discharge permit the issuance of permits,into the license of pollutant indexes and emissions limits how to determine the three aspects of in-depth analysis of livestock and poultry breeding industry blowdown licence management,standardized management to realize breeding industry,promote the benign,healthy and sustainable development of livestock and poultry breeding has important significance.1.Conduct statistical analysis of livestock and poultry breeding varieties in China,and suggest that pig,poultry(chicken,duck,goose),beef cattle,cow and sheep with large breeding volume and large pollution production volume should be included in the sewage discharge permit of livestock and poultry breeding industry,and the permit management should be conducted from the national level;Other local breeding varieties shall be determined by local governments according to the needs of environmental management to be included in the pollutant discharge permit for management.Comprehensive analysis of the different situations in China livestock farming scale standard,through the comparison and literature data research and management present situation analysis,suggest that discharge permit issued by the scale of livestock and poultry breeding live pig market 500 or higher,100 market or greater amount of beef cattle,cow breeding stock 100 or higher,laying hens breeding stock 10000 or more,years such quantity of 50000 or higher,mutton sheep in such a quantity of 100 or more large-scale farms.2.According to the pollutant discharge industry standards of livestock and poultry breeding,the pollutant indexes included in the pollutant discharge permit of livestock and poultry breeding for concentration control include COD,BOD5,ammonia nitrogen,total phosphorus,suspended substances,fecal escherichia coli and larvae;According to the main pollutants produced by livestock and poultry breeding and the main types of water environmental pollutants at present,combined with China's water environmental management requirements,it is suggested to take COD,total nitrogen,total phosphorus and ammonia nitrogen as the total control indexes.3.It is suggested that the concentration limit of permitted pollutants in livestock and poultry farming industry should be the emission limit of pollutants in livestock and poultry farming industry(GB18596-2001),and local governments have issued stricter standards according to environmental quality requirements.Based on the emission characteristics of pollutants in livestock and poultry breeding and the current situation of environmental management,the basic principle and calculation method of determining the total emission permit limit of livestock and poultry breeding industry are put forward in combination with the calculation method of industrial permit limit which has been implemented in domestic sewage permit management.The basic principle is to strictly determine the allowable emission limit on the premise of meeting the water environment quality standards.The determination process of permitted emission of pollutants in livestock and poultry breeding industry is as follows:(1)determine the scale of licensing(2)determine the emissions permits limit formula(3)data collection and review materials(4)identification data loopholes,eliminate invalid data(5)the site investigation,farms to evaluate farm production and waste treatment process,put forward Suggestions for improvement(6)reference aquaculture industry pollutant emission standards,concentration of pollutant emission limit value(7)according to the formula to calculate emissions permits,compare the environmental impact assessment,environmental statistics,pollution total data and control data of report and registration,etc.,comprehensive determine emissions limits(8)to determine whether a preliminary determine emissions limits meet water quality requirements,If not,the limit of emission standard based on water quality shall becalculated and the allowable emission shall be strictly determined.