The Director Of The Environmental Impact Assessment And Emission Management Department Of The Ministry Of Ecology And Environment Answered The Reporters' Questions On The Eight Standards, Namely, The Technical Guide For Pollution Sources And Strong Sources, The Textile Printing And Dyeing Industry, Etc.

The Ministry of ecology and environment recently issued national environmental protection standards such as textile printing and dyeing industry, boilers, pharmaceutical industry, pesticide manufacturing industry, chemical fertilizer industry, leather making industry, agricultural and sideline food processing industry - sugar industry, agricultural and sideline food processing industry - a technical guide for pollution sources of starch industry (hereinafter referred to as "guide").

In order to understand the background, main contents and characteristics, implementation priorities and significance of the guide, the reporter interviewed the responsible person of the environmental impact assessment and Emission Management Department of the Ministry of ecology and environment, and explained the guidelines in detail.

Q: what is the significance of the technical guide for source strength accounting?

What is the overall progress of the current pollution source management?

Answer: the technical guide for source strength accounting is an important technical support for serving well the battle of pollution prevention and control.

Finding out the emission pattern of pollution sources is an important foundation for tackling the tough battle of pollution control, and is also a scientific basis for formulating targeted governance schemes.

The introduction of source strength accounting guidelines and standardization of source strength accounting methods are conducive to mastering the emission laws of pollution sources, and carrying out meticulous management of pollution sources, effectively controlling pollutant emissions and improving the environmental quality of the regional watershed.

The technical guide for source strength accounting is an important means to speed up the reform of environmental management system and establish a streamlined, efficient, scientific and rational environmental management system for stationary sources.

In recent years, the Ministry of ecology and environment has issued a series of documents on the management of pollutant sources discharge permit, classified management directory, application and issuance of technical specifications, and gradually established and improved the environmental management system of stationary sources.

Formulating the technical guide for industry source and strong accounting is a concrete measure to promote the continuous improvement of the environmental management system of fixed pollution sources and promote the linkage between EIA and emission permit system.

Last year, the Ministry of ecology and environment has issued the guidelines on technical guidelines for pollution sources and strong sources, as well as a guide to nine industries, namely, thermal power, pulp and paper, steel, cement, flat glass manufacturing, coking chemical industry, petroleum refining industry, non-ferrous metal smelting, electroplating and so on.

The eight industries, such as textile printing and dyeing industry, have been perfected and supplemented by the guide standard system.

At present, our department is carrying out the compilation of the guide for calculating the source of the automobile industry and the ceramic industry, and is expected to be released by the end of this year.

Q: what are the eight industry source strength accounting guidelines released from the industry selection?

Answer: the guide for the eight industries, such as textile printing and dyeing industry, boilers, pharmaceutical industry, pesticide manufacturing industry, chemical fertilizer industry, tannery industry, agricultural and sideline food processing industry - sugar industry, agricultural and sideline food processing industry - starch industry, etc., is mainly considered. These industries are the industries with a high level of wastewater and pollutant emissions which are the main concern of the action plan for air pollution control, water pollution control action plan and the three year plan to win the blue sky.

Fertilizer industry belongs to the key industry of nitrogen and phosphorus control. The pesticide and pharmaceutical industries discharge a lot of pollutants and pollutants, and the light industry, such as textile printing and dyeing, leather making, agricultural and sideline food processing, is a large pollutant discharge industry.

Q: what are the accounting methods proposed in the guide?

What role can it play after implementation?

Answer: the methods proposed in the guide include four methods: the measurement method, the analogy method, the material balance algorithm and the pollution coefficient method.

The actual measurement method is used to calculate the pollutant discharge status of the existing pollution sources, and is calculated through online monitoring data or manual sampling monitoring data.

The analogy method is based on the measured data of the existing pollution sources with the same raw materials, production scale and process similarity, and calculates the pollutant production and discharge situation of the new pollution source.

The material balance algorithm is based on the law of mass conservation, and calculates the emission and emission of pollutants according to the migration and pformation rules of pollutants in the process.

The method of pollutant production coefficient refers to the calculation of pollutant production according to the production output of enterprises and the coefficient of pollutants produced in the relevant documents or documents, and then calculates the discharge of pollutants according to the operation effect of the pollution control facilities.

The priority of the method is that the priority of the new pollution source accounting is the analogy method and the material balance algorithm, supplemented by the pollutant production coefficient method.

Before the introduction of the source strength accounting guidelines, environmental impact assessment, total pollutant discharge control, pollution charge, environmental statistics and other environmental management work, due to the lack of unified source strength accounting technology, accounting results are quite different, the impact of ecological environment departments and enterprises of scientific judgment, to the subsequent environmental management brought a lot of trouble.

After the guidelines were issued, the principles and priorities of various methods were standardized, and the operability of source strength accounting methods was improved, and the relevant management and technical personnel were instruct to carry out source strength accounting work.

Q: what are the characteristics and innovations of the guide issued from the industry?

Answer: first, the accounting method highlights the characteristics of the industry, especially the detailed use of the material balance algorithm and analogy method in various industries.

For example, the material balance algorithm, the strong source of pharmaceutical and pesticide manufacturing, the compass has the characteristics of complex production process, long process flow, and many links of volatile organic compounds. According to the EPA's emission inventory improvement plan, the production process is decomposed into feeding, heating, vacuum operation, purging, decompression and other steps. According to the process, the accounting method of VOC production is given. Textile printing and dyeing, leather making are used to calculate the material balance for heavy metals in wastewater.

The law of analogy is combined with the characteristics of the industry to determine the conditions of different analogies and reflect the differences between industries.

Two, combined with the characteristics of industrial technology and management facilities, the source strength accounting of abnormal emissions is categorization.

For example, the four industries of fertilizer industry, starch industry, sugar industry and boilers are continuous production. Therefore, pollutant discharge from production facilities or facilities, production facilities or facilities maintenance, and pollution control facilities can not reach the effective management efficiency as abnormal emissions.

The four industries of the pharmaceutical industry, pesticide manufacturing industry, textile printing and dyeing industry and tannery industry are discontinuous production, and the production plant starts and stops more frequently. The pollutant discharge from the start-up and shutdown process of the production equipment or facilities is incorporated into the normal discharge calculation.

The three is to summarize and innovate some factors on the basis of the existing pollutant production coefficient in the unified industry.

The eight source strength guidelines published in this issue are mainly based on the "national pollution source census, the industrial pollution source production and discharge coefficient", the calculation method of pollutant emissions (including pollutant discharge coefficient, material balance method) and the technical license for pollutant discharge in 17 industries, including the thermal power plant and the pollutant discharge permit management.

Some industries, such as tannery industry, based on field investigation and experience summarization, give the pollution coefficient of suspended solids, BOD5, sulfide and other pollution factors.