1. What are the requirements for VOCs online monitoring equipment?

Netizen consultation: “Jiangsu Province Pollution Sources Automatic Monitoring and Management Measures (Trial)” No. Article 9 stipulates that chemical industries with a single exhaust outlet VOCs emission design hourly exhaust gas emission of 10,000 cubic meters or more must install VOCs automatic monitoring equipment. Are there any requirements for monitoring equipment? Is it in the form of FID or PIG? What method should be used for the online use of waste gas from hazardous waste warehouses with very small VOC emissions?Reply from Jiangsu Provincial Department of Ecology and Environment：1. Requirements for monitoring equipment. Article 10 of the “Jiangsu Province Pollution Sources Automatic Monitoring and Management Measures (Trial)” (Su Huanfa [2021] No. 3) clarifies the requirements that pollutant discharge units must meet when constructing automatic monitoring and monitoring equipment and supporting facilities, including: Product suitability testing requirements, product information registration and filing requirements, equipment installation and commissioning requirements, etc. 2. About VOCs monitoring instrument methods. At present, different standards have different requirements for the characterization of VOCs from fixed pollution sources. Generally, non-methane total hydrocarbons are the main ones, and some standards are mainly based on benzene series. The chemical company you are consulting for should use non-methane total hydrocarbons to characterize VOCs. When selecting VOCs automatic monitoring equipment, you must follow the “Technical Specifications for Continuous Monitoring of Non-methane Total Hydrocarbons in Exhaust Gas from Stationary Pollution Sources” (DB32/3944-2020) and “Fixed Pollution Sources” Select appropriate monitoring equipment in accordance with the requirements of “Technical Requirements and Detection Methods for Continuous Monitoring Systems for Non-Methane Total Hydrocarbons in Exhaust Gas” (HJ1013-2018). DB32/3944-2020 clarifies that “this standard applies to the construction, operation and management of continuous monitoring systems for non-methane total hydrocarbons in exhaust gases from fixed pollution sources using hydrogen flame ionization detectors (FID).” Therefore, when installing non-methane total hydrocarbon online monitoring instruments, it is necessary to use FID method instruments according to standards. 3. Regarding the online monitoring method of exhaust gas with small VOCs emissions. For low-concentration VOCs fixed pollution sources, the methods and equipment requirements for online monitoring instruments are the same as those for high-concentration VOCs fixed pollution sources. When specifically selecting instruments, it is necessary to select an instrument with an appropriate range based on the actual emission concentration.

2. Do I need to install automatic monitoring facilities if the exhaust gas standard flow rate is less than 30,000 cubic meters?

Netizen consultation: According to the Jiangsu Province Pollution Source Automatic Monitoring and Management Measures (Trial), the VOCs emission design hour for a single outlet Chemical industries with exhaust gas emissions of 10,000 cubic meters and above, and other industries with exhaust gas emissions of 30,000 cubic meters and above, should install VOCs automatic monitoring equipment. When the designed air volume of the exhaust gas treatment equipment is 30,000 cubic meters or more, due to factors such as the high original temperature of the exhaust gas, the standard flow rate of the exhaust gas during the actual monitoring process is less than 30,000 cubic meters. Is it still necessary to install automatic monitoring facilities? Reply from Jiangsu Provincial Department of Ecology and Environment:Article 9, Paragraph 4 of the “Jiangsu Province Pollution Sources Automatic Monitoring and Management Measures (Trial)” (Su Huanfa [2021] No. 3) stipulates: “Chemical industries with a single exhaust outlet VOCs emission design hourly exhaust gas emission of 10,000 cubic meters or more, and other industries with a 30,000 cubic meter or more exhaust gas emissions should install VOCs automatic monitoring equipment.” The “exhaust gas emission” here refers to the “design air volume” required to meet VOCs emission standards or treatment efficiency requirements. Therefore, the designed hourly air volume of the exhaust gas treatment equipment is 30,000 cubic meters or more, and the actual hourly air volume under monitored exhaust gas standard conditions is less than 30,000 cubic meters. Yes, automatic monitoring facilities still need to be installed.

3. Is it necessary to install VOCs automatic monitoring equipment?

Netizen consultation: Article 7 of the “Measures for the Automatic Monitoring and Management of Pollution Sources in Jiangsu Province (Trial)” requires that the discharge of wastewater and waste gas pollutants is included in the list of key pollutant discharge units , automatic monitoring equipment should be installed; Article 9 requires that the automatic monitoring factors of pollutants of pollutant discharge units should comply with the following provisions (4): Chemical industries with a single exhaust outlet VOCs emission design hourly exhaust gas emission of 10,000 cubic meters or more, 30,000 cubic meters Other industries with cubic meters and above install VOCs automatic monitoring equipment; based on the above two requirements, our company’s list of key non-wastewater and waste gas emission units, but the VOC emission design hourly exhaust gas emission from a single outlet is more than 10,000 cubic meters, is it necessary to install it? VOCs automatic monitoring equipment? Reply from Jiangsu Provincial Department of Ecology and Environment: 1.About the “Measures for the Automatic Monitoring and Management of Pollution Sources in Jiangsu Province (Trial)”. Article 7 of the “Measures for the Management of Automatic Monitoring of Pollution Sources in Jiangsu Province (Trial)” clarifies “which pollution-discharging units” should install automatic monitoring equipment, and Article 9 stipulates “which monitoring factors” should be installed by pollution-discharging units that install automatic monitoring equipment. When a pollutant discharging unit does not comply with the provisions of Article 7, it does not need to install automatic monitoring equipment and does not need to consider the relevant provisions of Article 9. According to your statement, your unit is not included in the list of “Key Pollutant Discharge Units Discharging Wastewater and Exhaust Gas Pollutants” and does not comply with Article 7 of the “Jiangsu Province Pollution Sources Automatic Monitoring and Management Measures (Trial)” (Su Huanfa [2021] No. 3) The provisions of the first paragraph require further verification and confirmation.��Comply with other provisions in Article 7. If none of them are met, your unit does not need to install automatic monitoring equipment; if it meets one of the provisions in Article 7, automatic monitoring equipment should be installed. 2. Regarding the installation of VOCs automatic monitoring equipment. In 2018, the Jiangsu Provincial Department of Ecology and Environment issued the “Notice on Carrying out the Inspection and Monitoring of Volatile Organic Compounds in Exhaust Gas from Stationary Pollution Sources in the Province” (Suhuanban [2018] No. 148), requiring that “the emission of VOCs treatment facilities should be within 10,000m3 /h and above, and other industry enterprises with an exhaust volume of 40,000m3/h or above” are identified as key VOCs emission management and control enterprises, and VOCs online monitoring facilities are installed. According to the provisions of the above documents, your unit should be included in the “List of Key VOCs Emission Control Enterprises” and included in the “List of Key Pollutant Discharge Units” management. In accordance with the requirements for enterprises to implement their main responsibilities, the emission outlet of your unit should be equipped with VOCs online monitoring facilities.

4. What is the scope of application of the “Water Pollutant Discharge Standard for Chemical Industry”?

Netizen consultation: 《Chemical Industry Water Pollutants Table 1 in the “Emission Standards” (DB32/939-2020) specifies the direct discharge limits, and Table 2 is the limit value of the sewage treatment plant. 3Tables 4 and 5 do not stipulate whether the limit value is direct discharge or indirect discharge, such as chemical raw materials and chemical products industry involving characteristic pollutant factors In the case of discharge or indirect discharge into centralized industrial wastewater treatment plants, whether the corresponding limits in Table 3, Table 4 and Table 5 of the standard must be implemented value? Or does this standard only apply to direct rows? Reply from Jiangsu Provincial Department of Ecology and Environment:1.Standard table 3, table 4 and Table 5 are specified as direct emission limits. 2. Chemical wastewater is indirectly discharged into the centralized industrial wastewater treatment plant. If the wastewater contains pollutants listed in Table 3 and Table 5, the wastewater will be discharged indirectly. The limit requirements in Table 3 and Table 5 should still be implemented; if the wastewater contains pollutants in Table 4, it should be treated according to the treatment process of the sewage treatment plant. Determine whether it has the ability to harmlessly treat corresponding pollutants. If the sewage treatment plant that accepts the production wastewater has the processing capacity of the corresponding characteristic factors in Table 4, the management enterprise can negotiate with the sewage treatment plant operating unit to determine the concentration of the treatment plant, and sign a commissioned treatment contract. , clarify the responsibilities of both parties, submit it to the ecological environment department and include it in the pollution discharge permit in accordance with the law; if the sewage treatment plant does not have the processing capacity for the corresponding characteristic factors, the limit requirements in Table 4 should be implemented. </span