The standard was formulated for the purpose of implementing Environmental Protection Law of the People’s Republic of China and Law of People’s Republic of China on the Promotion of Clean Production, protecting the environment and providing technical support and guidance for chlor-alkali enterprises. The standard set requirements for chlor-alkali enterprises on clean production according to current technical and equipment capacity and management level of the industry and on condition that these enterprises meet national and local standard for pollution discharge. The standard has three levels. Level I of diaphragm caustic soda method represents domestic leading level for clean production, level II stands for advanced domestic level and level III refers to basic domestic level of clean production. Level I of Ion-exchange membrane caustic soda method refers to advanced international level for clean production, Level II stands for advanced domestic level and Level III is the basic domestic level. The standard is subject to timely revision along with continued technical progress and development. The standard is applicable to caustic soda enterprises as general requirement for clean production. The standard classifies clean production standard into six categories, namely requirement on production technique and equipment, indies for resource and energy utilization, indies for products, indices for pollution generation (before end-of-pipe treatment), indices for waste recovery and reuse and requirement on environmental management. The standard applies to clean production auditing of caustic soda production with diaphragm caustic soda method and ion-exchange membrane caustic soda method. It also applies to judgment of clean production potential and opportunity, assessment and notification of its performance and environmental management such as environmental impact assessment and pollution discharge permit, etc. This is the first issuance of the standard.
Cleaner production standard Chlor-alkali industry (Caustic soda)(HJ 475－2009)
