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Second Public Announcement on the Environmental Impact Assessment for the Project to Produce 300,000 tons of ethanol per year from dimethyl ether by Hebi Tengfei Clean Energy Co., Ltd. Author/Source: Hebi Tengfei Clean Energy Co., Ltd. Date: 2020-03-31 Clicks: 11 I. Overview of the construction project Project name: Project to produce 300,000 tons of ethanol per year from dimethyl ether Contractor: Hebi Tengfei Clean Energy Co., Ltd. Environmental impact assessment agency: Henan Chemical Research Institute Co., Ltd. Nature of the project: New construction Location: South of Moushan Avenue and East of Baima Avenue, Shancheng District, Hebi City Total investment: 1.2 billion yuan Project code: 2019-410603-26-03-056468 Land use type: Industrial land II. Potential environmental impacts after the completion of the project, as well as measures to prevent and mitigate such negative impacts and their expected effects During operation, the project will have certain environmental impacts and risks. To address these issues, the assessment agency has proposed corresponding mitigation measures and predicted their expected effects, as follows: (1) Exhaust gases: The exhaust gases generated by this project include both organized and unorganized exhaust gases. Organized exhaust gases consist of process-related exhaust gases and those from flares. The process exhaust gases for this project mainly include MDEA decarburization exhaust gases, gas separation and drying exhaust gases, gas separation nitrogen-containing exhaust gases, carbonylation catalyst regeneration exhaust gases and activation exhaust gases, carbonylation off-gases and hydrogenation off-gases, furnace exhaust gases, and flare exhaust gases. Unorganized waste gases mainly include VOCs generated at the dynamic and static sealing points in the production unit area and at the loading and unloading areas. Gas separation of nitrogen-containing exhaust gases for recovery and use as fuel gas ； The main component of the MDEA decarboxylation exhaust gas is the removed CO2, which can be discharged directly ； Carbonylation off-gas and hydrogenation off-gas are recovered as fuel gas ； The catalyst from the carbonylation unit is regenerated and discharged after passing through a water scrubber; the carbonylation activation exhaust gas is sent to a flare for combustion disposal ； Clean energy is used as fuel for the exhaust gases from the heating furnace ； Install an oil and gas recovery system in the loading and unloading area. The unorganized waste gases from this project are mainly the unorganized emissions of VOCs leaking from the dynamic and static sealing points of the equipment in the production unit area. (2) Wastewater: The wastewater generated in this project includes production wastewater, domestic sewage, and other miscellaneous waters. Production wastewater mainly consists of drum drain water, circulating cooling water drain water, and water used for equipment maintenance and cleaning. Other miscellaneous waters include floor washing wastewater, initial rainwater, and laboratory wastewater. The wastewater is collected within the plant area and then discharged through the main outlet to the sewage treatment plant in Baoshan Industrial Cluster. The discharge meets the relevant emission standards as well as the quality requirements for water received by the sewage treatment plant in Baoshan Industrial Cluster. After being treated by the sewage treatment plant in Baoshan Industrial Cluster, the wastewater meets the required standards before being discharged into the Si River, thus having little impact on the surrounding environment. (3) Solid waste: The solid wastes generated during the production process of this project mainly include waste molecular sieves from the gas separation unit, waste desiccants from the gas separation unit, PSA waste adsorbents, waste carbonylation catalysts, waste adsorbents from the carbonylation depyridination tower, waste molecular sieves from the carbonylation unit, waste hydrogenation catalysts, waste molecular sieves from ethanol dehydration, and waste ceramic balls. Both general solid waste and hazardous solid waste can be properly treated and disposed of ； Hazardous waste is collected and disposed of by qualified organizations, while household waste is gathered and regularly removed for treatment by the sanitation authorities. (4) Noise: High-noise equipment includes various types of material pumps, blowers, exhaust fans, power machinery, etc. For high-noise equipment, measures such as installing shock-absorbing foundations and sound insulation are taken to ensure that the equipment’s noise level meets the requirements of Class 3 specified in the \"Emission Standards for Environmental Noise at the Boundaries of Industrial Enterprises\" (GB12348-2008). (5) Environmental risks: In response to project-related risks, enterprises should establish comprehensive risk prevention measures and develop emergency response plans. By strictly implementing the risk prevention measures recommended in environmental and safety assessments, their environmental risk levels can be kept within controllable bounds.