Standard No.:	GB 31573-2015
English Name:	Emission standards of pollutants for inorganic chemical industry
Chinese Name:	无机化学工业污染物排放标准
Professional Classification:	GB    National Standard
ICS Classification:	13.040.40 13.040.40    Stationary source emissions 13.040.40
Issued by:	MEP; AQSIQ
Issued on:	2015-04-16
Implemented on:	2015-7-1
Status:	superseded
Superseded by:	GB 31573-2015/XG1-2020 Emission standards of pollutants for inorganic chemical industry,includes Amendment 1
Superseded on:	2021-1-8
Language:	English
File Format:	PDF
Word Count:	7000 words
Price(USD):	170.0
Delivery:	via email in 1 business day

Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative. This standard is formulated with a view to implementing Environmental Protection Law of the People's Republic of China, Law of the People's Republic of China on Prevention and Control of Water Pollution, Law of the People's Republic of China on the Prevention and Control of Atmospheric Pollution, Marine Environment Protection Law of the People's Republic of China, and other laws and regulations, protecting environment, preventing pollution and promoting the production process and pollution control technology of inorganic chemical industry. This standard specifies the requirements for emission limits, monitoring, and supervision of water and air pollutants of inorganic chemical industry enterprises. The odor pollutants discharged and ambient noise made by inorganic chemical industry enterprises are subject to the corresponding national pollutant emission standards, and the identification, treatment and disposal of the solid wastes generated are subject to the national solid waste pollution control standards. The auxiliary power boiler shall comply with Emission Standard of Air Pollutants for Boilers or Emission Standard of Air Pollutants for Thermal Power Plants. All pollutants emission concentrations in this standard refer to mass concentration. This standard is hereby issued for the first time. New facility, from July 1, 2015, and existing facility, from July 1, 2017, will implement this standard, and the control of water and air pollutants emitted by them is subject to this standard, instead of those specified in GB 8978-1996 Integrated Wastewater Discharge Standard, GB 16297-1996 Integrated Emission Standards of Air Pollutants, and GB 9078-1996 Emission Standard of Air Pollutants for Industrial Kiln and Furnace. Upon approval of provincial people's government, all regions may also implement this standard in advance according to the need of local environmental protection and economic and technical conditions. For the case that special emission standards, e.g., GB 26132-2010 Emission Standard of Pollutants for Sulfuric Acid Industry, have been published in the inorganic chemical industry, the requirements of special emission standards, instead of this standard, shall apply to applicable object. This standard specifies the basic requirements for pollutant emission control of inorganic chemical industry enterprises. Local provincial people's government may formulate local pollutant emission standards for the items not specified in this standard; and it may also formulate local pollutant emission standards stricter than this standard for the items specified in this standard. When the requirements of environmental impact assessment documents or pollution emission permit are stricter than those in this standard or local standards, the approved environmental impact assessment documents or pollution emission permit shall prevail. This standard was formulated under organization of the Department of Science, Technology and Standards of the Ministry of Environmental Protection. This standard was approved by the Ministry of Environmental Protection on April 3, 2015. This standard was implemented from July 1, 2015. The Ministry of Environmental Protection is in charge of interpreting this standard. Emission Standards of Pollutants for Inorganic Chemical Industry 1 Application Scope This standard specifies the requirements for emission limits, monitoring, supervision and management of water and air pollutants emitted by industrial enterprises in regard to inorganic acids, alkalis, salts, oxides, hydroxides, peroxides, and elementary substances. This standard is applicable to emission management of water and air pollutants emitted by industrial enterprises in regard to inorganic acids, alkalis, salts, oxides, hydroxides, peroxides, and elementary substances, and to environmental impact assessment, environment protection facility design, and post-completion environmental protection acceptance of construction projects of the above industrial enterprises, as well as to emission management of water and air pollutants after being put into operation. This standard does not apply to emission management of water and air pollutants emitted from industries of inorganic chemical products such as sulfuric acid, hydrochloric acid, nitric acid, caustic soda, sodium carbonate, calcium carbide, inorganic phosphorus, inorganic coatings and pigments, phosphate fertilizer, nitrogen and potassium fertilizer, potassium hydroxide, etc., and of non-ferrous metals. This standard is applicable to the legal pollutant emission behaviors. The site selection of new pollution sources and the management of existing pollution sources within special protected zone are in accordance with Law of the People's Republic of China on the Prevention and Control of Atmospheric Pollution, Law of the People's Republic of China on Prevention and Control of Water Pollution, Marine Environment Protection Law of the People's Republic of China, Law of the People's Republic of China on Prevention of Environmental Pollution Caused by Solid Waste, Law of the People's Republic of China on Prevention and Control of Radioactive Pollution, Law of the People's Republic of China on Environmental Impact Assessment, etc. The emission control requirements of water pollutants specified in this standard are applicable to the behaviors of the enterprises discharging water pollutants, directly or indirectly, out of their legal boundaries. 2 Normative References For the purpose of this standard, the following documents or their provisions are quoted. For undated references, the latest edition of the normative document applies. GB 8978 Integrated Wastewater Discharge Standard GB 9078 Emission Standard of Air Pollutants for Industrial Kiln and Furnace GB 16297 Comprehensive Emission Standard of Air Pollutants GB/T 6920 Water Quality—Determination of pH Value—Glass Electrode Method GB/T 7466 Water Quality—Determination of Total Chromium GB/T 7467 Water Quality—Determination of Chromium(6)— Diphenylcarbohydrazide Spectrophotometric Method GB/T 7469 Water Quality—Determination of Mercury—Potassium Permanganate-Potassium Persulfate Decomposed Method—Dithizone Spectrophotometry GB/T 7470 Water Quality—Determination of Lead—Spectrophotometric Method with Dithizone GB/T 7471 Water Quality—Determination of Cadmium—Spectrophotometric Method with Dithizone GB/T 7472 Water Quality—Determination of Zinc—Spectrophotometric Method with Dithizone GB/T 7475 Water Quality—Determination of Copper, Zinc, Lead and Cadmium—Atomic Absorption Spectrometry GB/T 7484 Water Quality—Determination of Fluoride—Ion Selective Electrode Method GB/T 7485 Water Quality—Determination of Total Arsenic— Silver Diethyldithiocarbamate Spectrophotometric Method GB/T 11893 Water Quality—Determination of Total Phosphorus—Ammonium Molybdate Spectrophotometric Method GB/T 11901 Water Quality—Determination of Suspended Substance—Gravimetric Method GB/T 11906 Water Quality—Determination of Manganese—Potassium Periodate Spectrophotometric Method GB/T 11907 Water Quality—Determination of Silver—Flame Atomic Absorption Spectrophotometric Method GB/T 11910 Water Quality—Determination of Nickel— Dimethylglyoxime Spectrophotometric Method GB/T 11911 Water Quality—Determination of Iron and Manganese—Flame Atomic Absorption Spectrometric Method GB/T 11912 Water Quality—Determination of Nickel—Flame Atomic Absorption Spectrometric Method GB/T 11914 Water Quality—Determination of the Chemical Oxygen Demand—Dichromate Method GB/T 14671 Water Quality—Determination of Barium—Potentiometric Titration Method GB/T 14678 Air Quality—Determination of Sulfuretted Hydrogen, Methyl Sulfhydryl, Dimethyl Sulfide and Dimethyl Disulfide—Gas Chromatography GB/T 15264 Ambient Air—Determination of Lead—Flame Atomic Absorption Spectrophotometric Method GB/T 16157 The Determination of Particulates and Sampling Methods of Gaseous Pollutants Emitted from Exhaust Gas of Stationary Source GB/T 16489 Water Quality—Determination of Sulfide—Methylene Blue Spectrophotometric Method HJ 480 Ambient Air—Determination of the Fluoride—Method by Filter Sampling and Fluorine Ion-Selective Electrode Analysis HJ 481 Ambient Air—Determination of the Fluoride—Lime-paper Sampling followed by Fluorine Ion-Selective Electrode Method HJ 484 Water Quality—Determination of Cyanide—Volumetric and Spectrophotometry Method HJ 485 Water Quality—Determination of Copper—Sodium Diethyldithiocarbamate Spectrophotometric Method HJ 486 Water Quality—Determination of Copper— 2,9-Dimethy-1,10-Penanthroline Spectrophotometric Method HJ 487 Water Quality—Determination of Fluoride—Visual Colorimetry Zirconium Alizsrinsulfonate HJ 488 Water Quality—Determination of Fluoride—Fluorine Reagents Spectrophotometry HJ 489 Water Quality—Determination of Silver—Spectrophotometric Method with 3,5-Br2-PADAP HJ 490 Water Quality—Determination of Silver—Spectrophotometry with Cation 2B HJ 493 Water Quality Sampling—Technical Regulation of the Preservation and Handling of Samples HJ 494 Water Quality—Guidance on Sampling Techniques HJ 495 Water Quality Technical Regulation on the Design of Sampling Programmes HJ 533 Air and Exhaust Gas―Determination of Ammonia―Nessler’s Reagent Spectrophotometry HJ 535 Water Quality—Determination of Ammonia Nitrogen—Nessler’s Reagent Spectrophotometry HJ 536 Water Quality—Determination of Ammonia Nitrogen—Salicylic Acid Spectrophotometry HJ 537 Water Quality—Determination of Ammonia Nitrogen— Distillation-Neutralization Titration HJ 540 Ambient Air and Waste Gas―Determination of Arsenic―Silver Diethyldithiocarbamate Spectrophotometric Method (Tentative) HJ 542 Ambient Air―Determination of Mercury and Its Compounds―Cold Atomic Fluorescent Spectrophotometry after Sulfhydryl Cotton Preconcentration (Tentative) HJ 543 Stationary Source Emission―Determination of Mercury―Cold Atomic Absorption Spectrophotometry (Tentative) HJ 544 Stationary Source Emission—Determination of Sulfuric Acid Mist—Ion Chromatography (Tentative) HJ 547 Stationary Source Emission—Determination of Chlorine—Iodometric Method (Tentative) HJ 548 Stationary Source Emissions—Determination of Hydrogen Chloride—Silver Nitrate Titration (Tentative) HJ 549 Ambient Air and Waste Gas—Determination of Hydrogen Chloride—Ion Chromatography (Tentative) HJ 550 Water Quality—Determination of Cobalt—5-CI-PADAB Spectrophotometry (Tentative) HJ 597 Water Quality—Determination of Total Mercury—Cold Atomic Absorption Spectrophotometry HJ 602 Water Quality—Determination of Barium–Graphite Furnace Atomic Absorption Spectrophotometry HJ 603 Water Quality—Determination of Barium—Flame Atomic Absorption Spectrophotometry HJ 629 Stationary Source Emission—Determination of Sulphur Dioxide—Non-dispersive Infrared Absorption Method HJ 636 Water Quality—Determination of Total Nitrogen—Alkaline Potassium Persulfate Digestion UV Spectrophotometric Method HJ 637 Water Quality—Determination of Petroleum Oils and Animal and Vegetable Oils—Infrared Spectrophotometry HJ 657 Ambient Air and Stationary Source Emission—Determination of Metals in Ambient Particulate Matter—Inductively Coupled Plasma/Mass Spectrometry (ICP-MS) HJ 665 Water Quality—Determination of Ammonium Nitrogen by Continuous Flow Analysis (CFA) and Salicylic Acid Spectrophotometry HJ 666 Water Quality—Determination of Ammonium Nitrogen by Flow Injection Analysis (FIA) and Salicylic Acid Spectrophotometry HJ 667 Water Quality—Determination of Total Nitrogen by Continuous Flow Analysis (CFA) and N-(1-naphthyl)ethylene Diamine Dihydrochloride HJ 668 Water Quality—Determination of Total Nitrogen by Flow Injection Analysis (FIA) and N-(1-naphthyl)ethylene Diamine Dihydrochloride Spectrophotometry HJ 670 Water Quality—Determination of Orthophosphate and Total Phosphorus—Continuous Flow Analysis (CFA) and Ammonium Molybdate Spectrophotometry HJ 671 Water Quality—Determination of Total Phosphorus—Flow Injection Analysis (FIA) and Ammonium Molybdate Spectrophotometry HJ 675 Determination of Nitrogen Oxide Emissions from Stationary Sources by Acid-base Titration Method HJ 685 Stationary Source Emission—Determination of Lead—Flame Atomic Absorption HJ 692 Stationary Source Emission—Determination of Nitrogen Oxides—Non-dispersive Infrared Absorption Method HJ 693 Stationary Source Emission—Determination of Nitrogen Oxides—Fixed Potential by Electrolysis Method HJ 694 Water Quality—Determination of Mercury, Arsenic, Selenium, Bismuth and Antimony—Atomic Fluorescence Spectrometry HJ 700 Water Quality—Determination of 65 Elements—Inductively Coupled Plasma-Mass Spectrometry HJ/T 27 Stationary Source Emission—Determination of Hydrogen Chloride—Mercuric Thiocyanate Spectrophotometric Method HJ/T 28 Stationary Source Emission—Determination of Hydrogen Cyanide—Iso-nicotinic-acid-3-methyl-1-phenyl-5-pyrazolone Spectrophotometric Method HJ/T 29 Stationary Source Emission—Determination of Chromate Fog—Diphenyl Carbazide Spectrophotometric Method HJ/T 30 Stationary Source Emission—Determination of Chlorine—Methyl Orange Spectrophotometric Method HJ/T 42 Stationary Source Emission—Determination of Nitrogen Oxide—Ultraviolet Spectrophotometric Method HJ/T 43 Stationary Source Emission—Determination of Nitrogen Oxid—N(1-naphtye)—Ethylenediamine Dihydrochloride Spectrophotometric Method HJ/T 56 Determination of Sulphur Dioxide from Exhausted Gas of Stationary Source Iodine Titration Method HJ/T 57 Stationary Source Emission—Determination of Sulfur Dioxide—Fixed Potential by Electrolysis Method HJ/T 60 Water Quality—Determination of Sulfides—Iodometric Method HJ/T 63.1 Stationary Source Emission—Determination of Nickel—Flame Absorption Spectrophotometric Method HJ/T 63.2 Atmospheric Stationary Source—Determination of Nickel—Graphite Furnace Atomic Absorption HJ/T 63.3 Atmospheric Stationary Source—Determination of Nickel-Dimethylglyoxime with n-Butanol by Spectrophotometry HJ/T 64.1 Atmospheric Stationary Source—Determination of Cadmium—Flame Atomic Absorption Spectrometric Method HJ/T 64.2 Atmospheric Stationary Source—Determination of Cadmium—Graphite Furnace Atomic Absorption Spectrophotometric Method HJ/T 64.3 Atmospheric Stationary Source—Determination of Cadmium—p-Azobenzene Diazo Aminoazobenzene Sulfonic Acid Spectrophotometry HJ/T 65 Atmospheric Stationary Source—Determination of Tin—Graphite Furnace Atomic Absorption Spectrophotometric Method HJ/T 67 Atmospheric Stationary Source—Determination of Fluoride Compound—Ion Selective Electrode Method HJ/T 70 High-chlorine Wastewater—Determination of Chemical Oxygen Demand—Chlorine Gas Calibration HJ/T 75 Specifications for Continuous Emissions Monitoring of Flue Gas Emitted from Stationary Sources (on Trial) HJ/T 76 Specifications and Test Procedures for Continuous Emission Monitoring Systems of Flue Gas Emitted from Stationary Sources (on Trial) HJ/T 91 Technical Specifications Requirements for Monitoring of Surface Water and Waste Water HJ/T 132 High-Chlorine Wastewater—Determination of Chemical Oxygen Demand—Potassium Iodide Alkaline Potassium Permanganate Method HJ/T 195 Water Quality—Determination of Ammonia Nitrogen—Gas-Phase Molecular Absorption Spectrometry HJ/T 199 Water Quality—Determination of Total Nitrogen—Gas-Phase Molecular Absorption Spectrometry HJ/T 200 Water Quality—Determination of Sulphide—Gas-Phase Molecular Absorption Spectrometry HJ/T 373 Technical Specifications of Quality Assurance and Quality Control for Monitoring of Stationary Pollution Source HJ/T 397 Technical Specifications for Emission Monitoring of Stationary Source HJ/T 399 Water Quality—Determination of Chemical Oxygen Demand—Rapid Digestion Spectrophotometric Method Measures for Automatic Monitoring and Management of Pollution Sources (Decree No.28 of the State Environmental Protection Administration) Measures for the Administration of Environmental Monitoring (Decree No.39 of the State Environmental Protection Administration) 3 Terms and Definitions For the purposes of this standard, the following terms and definitions apply. 3.1 inorganic chemical industry industry that produces inorganic acids, alkalis, salts, oxides, hydroxides, peroxides, and elementary chemicals by using natural resources and industrial by-products. This standard refers specifically to the manufacturing industries of inorganic compounds other than sulfuric acid, hydrochloric acid, nitric acid, caustic soda, sodium carbonate, calcium carbide, inorganic phosphorus, inorganic coatings and pigments, phosphate fertilizer, nitrogen and potassium fertilizer, potassium hydroxide, non-ferrous metals, etc., mainly including inorganic heavy metals compounds industry, inorganic cyanide industry, sulfide and sulfate industry, halogen family of industry, boron compounds and borate industry, silicon compounds and silicate industry, calcium compounds and calcium salt industry, magnesium compounds and magnesium salt industry, peroxide industry, and metallic potassium (sodium) industry, etc. 3.2 inorganic heavy metals compounds industry industry that produces various inorganic heavy metals compounds by using heavy metal element minerals (e.g., barium, strontium, chromium, zinc, manganese, nickel, molybdenum, copper, lead, cadmium, tin, mercury, cobalt, antimony, zirconium, silver, thallium), elementary substances, and materials containing heavy metals, mainly including industries in regard to barium compounds, strontium compounds, chromium and chromium compounds, zinc compounds, manganese compounds, nickel compounds, molybdenum compounds, copper compounds, lead compounds, cadmium compounds, tin compounds, mercury compounds, cobalt compounds, zirconium compounds, antimony compounds, silver compounds, thallium compounds, etc. 3.3 barium compounds industry industry that produces barium carbonate by using barium-containing minerals, and barium compounds by using barium carbonate, mainly including barium compounds industries in regard to barium carbonate, barium sulfate, barium chloride, barium hydroxide, barium nitrate, barium oxide, etc. 3.4 strontium compounds industry industry that produces strontium carbonate by using strontium-containing minerals, and strontium compounds by using strontium carbonate, mainly including strontium compounds industries in regard to strontium carbonate, strontium nitrate, strontium sulfate, strontium titanate, strontium hydroxide, strontium chloride, strontium fluoride, strontium oxide, etc. 3.5 chromium and chromium compounds industry industry that produces chromium compounds (e.g., sodium chromate, sodium bichromate) by using chromite, carbon ferrochrome, and the like, and various chromium-containing inorganic compounds by using chromium compounds, mainly including chromium compounds industries in regard to chromate, dichromate, chromic anhydride, basic chrome sulphate, chromium metal, etc. 3.6 zinc compounds industry industry that produces various zinc compounds by using zinc ingot, zinc slag, zinc oxide, and the like, mainly including zinc compounds industries in regard to zinc oxide, basic zinc carbonate, zinc chloride, zinc nitrate, zinc sulfate, zinc dithionite, zinc phosphide, zinc phosphate, zinc fluorosilicate, zinc borate, etc. 3.7 manganese compounds industry industry that produces manganese sulfate and other manganese compounds by using manganic concentrate (pyrolusite, rhodochrosite), manganese metal, and the like, or that produces manganese chloride, manganese oxide, manganese carbonate, manganese nitrate, permanganate, and other manganese compounds therefrom 3.8 nickel compounds industry industry that produces nickel sulfate and other nickel compounds by using high grade nickel, nickel metal, nickel-containing waste, and the like, or that produces nickel nitrate, nickel oxide, nickel carbonate, nickel halide, and other nickel compounds therefrom 3.9 molybdenum compounds industry industry that produces ammonium polymolybdate and other molybdenum compounds by using molybdenum concentrate, molybdenum, molybdenum-containing waste, and the like, or that produces molybdate and orthomolybdate, molybdenum oxide, molybdenum sulfide, molybdenum halogenide, and other molybdenum compounds therefrom 3.10 copper compounds industry industry that produces copper sulfate and other copper compounds by using copper ore, copper-containing waste, metallic copper, and the like, or that produces copper nitrate, copper phosphate, basic cupric carbonate, copper oxide, copper halogenide, and other copper compounds therefrom 3.11 lead compounds industry industry that produces lead oxide and other lead compounds by using lead ingot, lead-containing waste, and the like, or that produces lead nitrate, lead sulfate, lead carbonate, lead silicate, lead halide, and other lead compounds therefrom 3.12 cadmium compounds industry industry that produces cadmium chloride, cadmium nitrate, and other cadmium compounds by using electrolytic cadmium metal, sponge cadmium, cadmium-containing waste, and the like, or that produces other cadmium compounds therefrom 3.13 tin compounds industry industry that produces tin chloride, tin sulfate, and other tin compounds by using refined tin, tin-containing waste, and the like, or that produces other tin compounds therefrom 3.14 mercury compounds industry industry that produces mercury chloride and other mercury compounds by using metallic mercury, or that produces other mercury compounds therefrom 3.15 cobalt compounds industry industry that produces cobalt carbonate and other cobalt compounds by using metallic cobalt, cobalt-containing waste, and the like, or that produces other cobalt compounds therefrom 3.16 zirconium compounds industry industry that produces zirconium oxychloride, zirconium dioxide, and other zirconium compounds by using zircon, zirconium-containing waste, and the like, or that produces other zirconium compounds therefrom 3.17 silver compounds industry industry that produces silver nitrate and other silver compounds by using metallic silver (containing mixed silver), silver-containing waste, and the like, or that produces other silver compounds therefrom 3.18 antimony compounds industry industry that produces various antimony compounds by using antimony white and antimony-containing waste, mainly including antimony compounds industries in regard to antimony chloride, antimony nitrate, antimony phosphate, antimony sulfide, etc. 3.19 thallium compounds industry industry that produces thallium compounds by using metallic thallium, mainly including antimony compounds industries in regard to thallium sulfate, thallium carbonate, thallium sulfide, thallium halide, thallium nitrate, etc. 3.20 inorganic cyanide industry industry that produces hydrocyanic acid and sodium cyanide by using natural gas, light oil or other by-products, or that produces inorganic cyanide therefrom 3.21 sulfide and sulfate industry industry that produces various sulfur compounds and sulfates by using sulfur, sulfur minerals or other industrial by-products, mainly including sulphurizing salt, carbon disulfide, sulfate, polymeric sulfate, subsulphate, pyrosulfate, hydrosulfite, sulfite, double sulfates, thisoulphate, and other sulfur compounds and sulfate industries. Heavy metal sulfur compounds and sulfates are classified into heavy metals. 3.22 halogen family of industry industry that produces inorganic fluorine compounds, inorganic chlorine compounds, chlorate, bromine and bromate, iodine and iodate by using minerals containing fluorine, chlorine, bromine and iodine. Sodium chloride and potassium chloride are not included in this standard. 3.23 inorganic fluoride industry industry that produces inorganic fluorides by using fluorite, sodium fluorosilicate, and other fluorine-containing compounds, mainly including industries in regard to fluoride, fluorosilicic acids and salts, fluoaluminic acids and salts, fluoroboric acids and salts, fluorine fluxing agent, etc. Heavy metal fluorine compounds are classified into heavy metals. 3.24 inorganic chloride and chlorate industry industry that produces inorganic chlorine compounds by using corresponding metal (containing heavy metals) or its compounds reacting with chlorine or hydrochloric acid, and that produces sodium chlorate by using sodium chloride through electrolysis, and chlorite, perchlorate, chlorine dioxide, and chlorate series products therefrom. Heavy metal inorganic chlorine compounds and chlorate are classified into heavy metals. 3.25 inorganic bromine and bromate industry industry that produces bromine by using brine and bittern, or that produces inorganic bromine compounds therefrom 3.26 inorganic iodine and iodate industry industry that produces iodine by using by-products such as seaweed, brine, bittern or oil drilling water, natural gas drilling water, phosphorus ore, potassic salt ore, or that produces inorganic iodine compounds therefrom 3.27 initial rainwater runoff rainwater whose characteristic water pollutant in the production area of inorganic chemical industry enterprises is in excess of the direct discharge limit specified in this standard 3.28 effluent volume volume of wastewater discharged from enterprises or production facilities out of the legal boundaries of enterprises, including various kinds of wastewater discharged outward which are directly or indirectly related to production, such as domestic sewage and cooling wastewater in plant area and water discharged from boilers and power plants there 3.29 existing facility inorganic chemical industry enterprises or production facilities which have been completed and put into operation or whose environmental impact assessment documents have been approved before the implementation date of this standard 3.30 new facility constructed, renovated and extended construction projects of inorganic chemical industry whose environmental impact assessment documents are approved from the implementation date of this standard 3.31 public wastewater treatment system enterprise or organization in charge of collecting wastewater by using sewage pipelines or other ways, and providing wastewater treatment services for more than two pollutant discharging units with the effluent volume meeting the relevant emission standards; it includes urban sewage treatment plants and park (including all kinds of industrial parks, development zones, industrial clusters, etc.) sewage treatment plants of various scales and types, whose wastewater treatment degree shall reach Level II or higher 3.32 direct discharge behavior that the pollutant discharging unit directly discharges water pollutants to the environmental water 3.33 indirect discharge behavior that the pollutant discharging unit discharges water pollutants to public wastewater treatment system 3.34 standard condition state at which the temperature is 273.15 K and the pressure is 101 325 Pa. The emission mass concentration limits of air pollutants specified in this standard are all based on the dry air under standard condition. 3.35 enterprise boundary legal boundary of inorganic chemical industry enterprises, if there is no legal boundary, it refers to the actual boundary of an enterprise 4 Emission Requirements of Pollutants 4.1 Emission control requirements of water pollutants 4.1.1 Existing facility continues to enforce GB 8978 before July 1, 2017, and begins to implement emission limits of water pollutants specified in Table 1 from July 1, 2017. 4.1.2 New facility begins to implement emission limits of water pollutants specified in Table 1 from July 1, 2015.

Foreword i 1 Application Scope 2 Normative References 3 Terms and Definitions 4 Emission Requirements of Pollutants 5 Requirements for Pollutant Monitoring 6 Implementation and Supervision