The 40,000-ton polyoxymethylene project has passed the acceptance inspection

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The 40,000-ton/year polyoxymethylene project at Shanghai Lanxing Chemical New Materials Factory has recently passed the acceptance inspection organized by the Environmental Assessment Department of the Ministry of Environmental Protection. 　　The project consists of a silver-based formaldehyde synthesis unit, a trioxane formaldehyde unit, a dioxolane unit, a bulk-formaldehyde production unit, along with corresponding utility and auxiliary facilities. The total investment in the project is 1.38 billion yuan, with environmental protection investments accounting for 4.72%. The supporting environmental facilities for the project include two waste gas incinerators, two sets of waste gas scrubbers, a wastewater treatment system with a processing capacity of 1,400 tons per day, a reclaimed water reuse system with a capacity of 1,200 tons per day, an accident wastewater tank with a volume of 1,100 cubic meters, and shut-off valves installed at the rainwater inlets. 　　Based on the results of the acceptance monitoring, the flue gas emitted from the incinerator in this project meets the requirements of the \"Pollution Control Standards for Incineration of Hazardous Wastes\" (GB 18484–2001). The emissions from other waste gas treatment devices comply with the secondary standards set out in the \"Comprehensive Emission Standards for Air Pollutants\" (GB 16297–1996). The concentrations of pollutants such as methanol and formaldehyde at the uncontrolled emission monitoring points around the factory also meet the requirements of the \"Comprehensive Emission Standards for Air Pollutants\", while the odor concentration adheres to the \"Emission Standards for Odorous Pollutants\". The daily maximum emission concentrations of various pollutants at the main sewage discharge outlet all meet the secondary standards specified in the \"Shanghai Comprehensive Wastewater Discharge Standards\" (DB 31/199–1997), while the noise level complies with the standards for Class III areas as set out in the \"Emission Standards for Environmental Noise at Industrial Enterprise Boundaries\" (GB 12348–2008). 76% of the surveyed public expressed satisfaction or basic satisfaction with the project’s environmental protection efforts.