<<Factory enterprise sewage discharge standards >> Validity: current
Issue date: 1993-07-17
Implementation date: 1994-01-01
1, the subject matter and the scope of application
These standards provide for the discharge of sewage sludge from the municipal sewage treatment plants, standard values and testing, discharge and supervision.
This standard applies to urban sewage treatment plants throughout the country. Local can be based on this standard and combined with local characteristics of local urban sewage treatment plant sewage sludge discharge standards. If, due to special circumstances, the need for leniency in this standard, should be reported to the competent authority for approval of the standard.
2, citation standards
GJ18 sewage discharge into urban sewers water quality standards
GB3838 environmental quality standards for surface water
GB4284 control of pollutants in agricultural sludge standards
GB3097 seawater quality standards
GJ26 urban sewage water quality test method standards
GJ31 urban sewage treatment plant accessory buildings and ancillary equipment design standards
3, cited standards
3.1 into the urban sewage treatment plant, the value of the water quality, the value shall not exceed the provisions of the GJ18 standard.
3.2 urban sewage treatment plant, according to the treatment process and the degree of treatment, sub-bit primary treatment and secondary treatment.
3.2 by the urban wastewater treatment plant water quality discharge standards, should be consistent with the provisions of Table 1.
Water quality discharge standards for municipal wastewater treatment plants (mg / L) Table 1
No.
Primary treatment
Secondary treatment
Maximum permissible discharge concentration
Processing Efficiency %
Maximum permissible discharge concentration
1
PH value
6.5~8.5
This is the highest discharge concentration. 8.5
6.5~8.5
2
Suspended matter
<120
Not less than 40
<30
3
Biochemical oxygen demand (5d,20℃)
<150
Not less than 30
<30
4
Chemical Oxygen Demand (Potassium Dichromate Method)
<250
Not less than 30
<120
5
Color (Dilution Times)
-
-
<80
6
Oil
-
-
<60
7
Volatile phenols
-
-
<1
8
Cyanide
-
-
.<0.5
9
Sulfide
-
-
<1
10
Fluoride
-
-
<15
11
Benzenamine
-
-
<3
12
Copper
-
-
<3
13
Zinc
-
-
<1
14
Total Mercury
-
-
<15
15
Total Lead
-
-
<0.05
16
Total Chromium
-
-
<1
17
Hexavalent chromium
-
-
<1.5
18
Total nickel
-
-
<1
19
Total cadmium
-
-
<0.2
. lt;0.1
20
Total arsenic
-
-
<0.5
<< < Air Pollution Emission Standards>> For the purpose of carrying out the "People's Republic of China **** and the State of Air Pollution Prevention and Control Act", controlling air pollutant emissions in the cement industry, and promoting industrial restructuring of cement industry, this standard is formulated. Structural adjustment, the formulation of this standard.
This standard replaces GB 4915-1996 "Emission Standards for Air Pollutants in Cement Plants" according to the following dates. --New production lines: since January 1, 2005; - Existing production lines: since July 1, 2006
This standard and GB 4915-1996 "Cement Plant Air Pollutant Emission Standards" compared to the main changes are as follows: - The scope of application of the standard is extended to the entire process of cement industrial production: not only including cement manufacturing (including grinding station), but also mining and on-site crushing. Mining and on-site crushing are no longer subject to GB16297-1996 "Comprehensive Emission Standards for Air Pollutants" according to the standard. The name of the standard is accordingly amended to "Emission Standards for Air Pollutants in the Cement Industry"; - The particulate emission requirements for the production of cement products are added; - The emission limits for rotary kilns and vertical kilns are standardized; - The emission limits for rotary kilns and vertical kilns are --No longer stipulate emission limit values according to ambient air quality functional zones; --For existing production lines, no longer stipulate different emission limit values according to different establishment times, unify the standards for existing production lines and set a transition period for meeting the standards; and further tighten the emission standards for newly-built production lines; --Increased emission requirements for cement kiln incineration of hazardous wastes; --Increased environmental protection related management regulations, and revised the relevant regulations on synchronized operation rate and height of exhaust pipe; --Increased the number of The provisions of installing continuous monitoring devices for flue gas emission in the exhaust pipe of cement kiln and other thermal equipments have been added; -- The relevant provisions for the implementation of the standards have been added.
In accordance with relevant legal provisions, this standard has the effect of mandatory implementation. This standard replaces the successive versions of: GB 4915-85, GB 4915-1996. This standard is proposed by the State Environmental Protection Administration, Department of Science and Technology Standards. Standard commissioned by the drafting unit: China Academy of Environmental Sciences, Institute of Environmental Standards, China Building Materials Group Hefei Cement Research and Design Institute, China Materials Industry Science and Technology Group Corporation. This standard State Environmental Protection Administration on December 29, 2004 approved. This standard from January 1, 2005 implementation. This standard by the State Environmental Protection Administration to explain.
Cement industry air pollutant emission standards Scope This standard specifies the cement industry, each production equipment exhaust air pollutant emission limits, the workplace particulate matter emission limits, as well as environmental protection related management regulations. This standard also specifies the requirements for particulate matter emissions from the production of cement products. This standard applies to the management of air pollutant emissions for existing cement industrial enterprises and cement product manufacturers, as well as the management of air pollutant emissions for the environmental impact assessment, design, completion acceptance of new, altered and expanded cement mines, cement manufacturing and cement product production lines and their completion. Normative references The provisions in the following documents become the provisions of this standard through the references in this standard. Where the cited documents are not dated, the latest version is applicable to this standard. GB16297-1996 Comprehensive Emission Standards for Air Pollutants GB18484 Pollution Control Standards for Hazardous Waste Incineration GB／T 16157 Determination of Particulate Matter in the Exhaust of Stationary Pollution Sources and Sampling Methods for Gaseous Pollutants GB／T 15432 Determination of Total Suspended Particulate Matter (TSP) in the Ambient Air Weight Method HJ／T 42 Determination of Nitrogen Oxides in the Exhaust of Stationary Pollution Sources Ultraviolet Spectrophotometric Method HJ／T 43 Determination of nitrogen oxides in the exhaust of stationary sources Naphthalene ethylenediamine hydrochloride spectrophotometric method HJ／T 55 Technical guidelines for monitoring the unorganized emission of air pollutants HJ／T 56 Determination of sulfur dioxide in the exhaust of stationary sources Iodine method HJ／T 57 Determination of sulfur dioxide in the exhaust of stationary sources potentiostatic electrolysis method HJ／T 67 Determination of atmospheric fixed sources of fluoride Ion Selective Electrode Method HJ／T 76 Fixed source emissions of pollution determination ／T 76 Fixed pollution source emission flue gas continuous monitoring system technical requirements and detection methods HJ / T 77 polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans determination isotope dilution high-resolution capillary gas chromatography / high-resolution mass spectrometry Terminology and Definitions The following terminology and definitions are applicable to this standard.
Standard state refers to the temperature of 273K, pressure of 101325Pa state, referred to as "standard state". This standard specifies the concentration of air pollutant emissions refer to the standard state of dry flue gas in the value.
Maximum allowable emission concentration means that the treatment facilities after the exhaust of pollutants in any 1-hour average concentration shall not exceed the limit; or no treatment facilities in the exhaust of pollutants in any 1-hour average concentration shall not exceed the limit.
Emissions per unit of product Refers to the weight of hazardous substances emitted per ton of product produced by each facility, in kg/t of product. Product output is calculated according to the actual hourly output of the equipment during the pollutant monitoring period, such as cement kiln, clinker cooler to clinker output, raw mill to raw material output, cement mill to cement output, coal mill to the coal dust produced, dryer, dryer mill to the dry material produced. For kiln-mill integrated machines, the amount of material produced by the mill is calculated as the amount of material produced by the mill when the kiln-mill is operated jointly, and the amount of clinker produced by the cement kiln is calculated as the amount of clinker produced by the cement kiln when the cement kiln is operated separately.
Unorganized emission Refers to the unregulated emission of air pollutants without passing through the exhaust pipe, which mainly includes the stacking of materials in the workplace, open conveyor dust and leakage of dusty gas from pipelines and equipment. Low exhaust emissions are organized emissions, but under certain conditions can cause the same consequences as the unorganized emissions, therefore, in the implementation of the "unorganized emissions monitoring point concentration limits" indicators, caused by the low exhaust monitoring point pollutant concentration increase will not be deducted.
Unorganized emission monitoring point concentration limit value means the limit value that the pollutant concentration at the monitoring point must not exceed in any 1-hour average.
Height of exhaust pipe The height from the ground level where the exhaust pipe (or its main building structure) is located to the exit meter of the exhaust pipe.
Cement kiln Refers to cement clinker calcining equipment, usually including rotary kiln and vertical kiln two categories.
In-line kiln/raw mill refers to a system in which the kiln exhaust gas is introduced into the material grinding system, the waste heat of the exhaust gas is utilized to dry the material, and the exhaust gas from the kiln and the mill is treated with a single dust removal device for the kiln and the mill to operate jointly.
Dryer, drying mill, coal mill and cooler Dryer refers to a variety of types of material drying equipment; drying mill refers to material drying and grinding equipment; coal mill refers to a variety of types of pulverized coal preparation equipment; cooler refers to a variety of types (cylindrical, grate, etc.) cooling clinker equipment.
Crusher, mill, packaging machine and other ventilation production equipment Crusher refers to a variety of crushing equipment for lumpy and granular materials; mill refers to a variety of material grinding equipment system (excluding drying mill and coal mill); packaging machine refers to a variety of types of packaging cement equipment (including bulk cement silo); other ventilation production equipment refers to other than the above main production equipment that requires ventilation of the production equipment, including material conveying equipment, silos and various types of cooling clinker equipment. Equipment, silos and various types of storage, etc..
Cement products production Refers to the production of ready-mixed concrete and precast concrete parts, excluding the process in which cement is used for on-site mixing.
Existing production lines, new production lines Existing production lines are cement mines, cement manufacturing, cement products production lines that have been completed and put into operation before the date of implementation of this standard (January 1, 2005) or the environmental impact report has been approved. New production line refers to the new, reformed or expanded cement mine, cement manufacturing and cement products production line whose environmental impact report has passed the approval from the date of implementation of this standard (January 1, 2005) onwards. Emission Limits Air pollutant emissions from the exhaust of production equipment Before July 1, 2006, the air pollutant emissions from the exhaust of production equipment (facilities) of existing cement plants (including grinding stations) are still in accordance with GB4915-1996; the existing cement mines and cement products factories are still in accordance with GB 16297-1996. From July 1, 2006 to December 31, 2009, the emissions from the exhaust of production equipment of existing production lines are still in accordance with GB 16297-1996; the emissions from the exhaust of production equipment of existing cement mines and cement products factories are still in accordance with GB 16297-1996. From July 1, 2006 to December 31, 2009, the maximum permissible emission concentration of particles and gaseous pollutants in the exhaust pipe of each production equipment (facility) of the existing production line and the emission per unit of product shall not exceed the limit values stipulated in Table 1. Since January 1, 2010, the maximum permissible concentrations of particulate matter and gaseous pollutant emissions from the exhaust of production equipment (facilities) of existing production lines and the emissions per unit of product shall not exceed the limits specified in Table 2. Since January 1, 2005, the new production line of each production equipment (facilities) in the exhaust of particulate matter and gaseous pollutants in the maximum allowable emission concentrations and emissions per unit of product shall not exceed the limits specified in Table 2.
Production process Production equipment Particulate matter Sulfur dioxide Nitrogen oxides (in terms of NO2) Fluoride (in terms of total fluoride) Emission concentration mg/m3 Emission per unit of product kg/t Emission concentration mg/m3 Emission per unit of product kg/t Emission concentration mg/m3 Emission per unit of product kg/t Emission concentration mg/m3 Emission per unit of product kg/t Mining Crusher Cement production Cement silos and other ventilation production equipment 50 - - - - - - - - - - - - Cement products production - - - - - - - - Note: * refers to the concentration of emissions and emissions per unit of product under the condition of 10% O2 content in the flue gas.
Production process Production equipment Particulate matter Sulfur dioxide Nitrogen oxides (as NO2) Fluoride (as total fluoride) Emission concentration mg/m3 Emission per unit of product kg/t Emission concentration mg/m3 Emission per unit of product kg/t Emission concentration mg/m3 Emission per unit of product kg/t Emission concentration mg/m3 Emission per unit of product kg/t Emission concentration mg/m3 Emission per unit of product kg/t Mining Crusher Cement Manufacturing Cement Kilns and Kiln Grinding Machines* 50 0.15 200 0.60 30 0.024 - - - - - - Cement products production Cement silos and other ventilated production equipment 30 - - - - - - - - - - - - - - - - - Note - - - - - - Note: * refers to the emission concentration and emission per unit of product in the state of 10% O2 content in the flue gas. When the cement kiln burns hazardous waste, the emission limits of particulate matter, sulfur dioxide, nitrogen oxides and fluoride in the exhaust are implemented in accordance with the construction time of the cement kiln in accordance with Table 1 or Table 2, respectively; other pollutants are implemented in accordance with the emission limits stipulated in the "Pollution Control Standards for the Incineration of Hazardous Wastes" (GB 18484), except that the maximum concentration of dioxin emissions shall not exceed 0.1 ng TEQ/m3. Unorganized emission limits of particulate matter in the workplace Existing cement factories (including grinding stations), the unorganized emission of particulate matter before July 1, 2006 is still the implementation of GB 4915-1996; Existing cement product factories are still the implementation of GB 16297-1996. Since July 1, 2006, the existing production lines, and since January 1, 2005, the concentration of unorganized emission of particulate matter in the workplace at the monitoring point shall not exceed the limit values specified in Table 3 The limit values specified.
Operating place Particulate matter unorganized emission monitoring point Concentration limit *1, mg/m3 Cement plant (including grinding station) Cement products factory 20m outside the plant boundary 1.0 (minus the reference value *2) Note: *1 refers to the monitoring point at the total suspended particulate matter (TSP) hourly concentration value. *2 See Article 6.2.1 for the meaning of reference value. Other management regulations 1.1 Requirements for control of unorganized emission of particulate matter Cement mines, cement manufacturing and cement product production processes shall take effective measures to control unorganized emission of particulate matter. The material handling, conveying, loading and unloading, storage process of new production line should be closed, and other effective dust suppression measures can also be taken for lumps, sticky and wet materials, slurry, as well as the loading and unloading process of vehicles and ships. Existing production line of dry powder material handling, conveying, loading and unloading, storage should be closed; open storage yard should be taken to prevent dust, rain wash loss measures; car and ship loading and unloading, should take effective measures to prevent dust. Unusual and accidental emission control requirements Dust removal device should be synchronized with its corresponding production process equipment. Production process equipment and dust removal device should be measured separately the annual cumulative operating time, to dust removal device annual operating time and the annual operating time of the production process equipment, assessment of synchronous operation rate. New cement kilns should ensure that the dust removal device can still operate normally under the fluctuation of the production process, and prohibit abnormal emissions. Existing cement kiln dust removal device, its relative to the cement kiln ventilator annual synchronous operation rate shall not be less than 99%. Accidental emission due to the failure of dust removal device, emergency measures should be taken to stop the host equipment, until the dust removal device overhaul is completed **** the same as put into use. Requirements for the height of the exhaust pipe In addition to lifting and conveying, storage under the small silo dust removal facilities, production equipment exhaust pipe (including workshop exhaust) shall not be less than 15m. The following production equipment exhaust pipe height should also comply with the provisions of Table 4.
Name of production equipment, cement kilns and kilns and mills Dryers, drying mills, coal mills and coolers Crusher, mills, packaging machines and other ventilation equipment Single line (machine) capacity, t / d ≤ 240 ＞ 240 ～ 700 ＞ 700 ～ 1200 ＞ 1200 ≤ 500 ＞ 500 ～ 1000 ＞ 1000 above the body of the building more than 3m Minimum allowable height, m 30 45* 60 80 20 25 30 Note: * Existing vertical kiln exhaust pipe is still required to be 35m.
If the exhaust pipe of the production equipment of the existing cement production line does not reach the height specified in Table 4, the emission of air pollutants should be tightened control. Emission limits are calculated according to the following formula. Where: C - the actual permissible emission concentration, mg / Nm3; C0 - Table 1 or Table 2 allowable emission concentration, mg / Nm3; h - the actual height of the exhaust pipe m; h0 - the height of the exhaust pipe specified in Table 4, m. 1.2 Other provisions shall not adopt or use the backward production processes and equipment that seriously pollute the air environment as stipulated in Article 19 of the Law of the People's Republic of China on Prevention and Control of Air Pollution. It is prohibited to mine and produce cement and its products in the environmental air quality class I functional area. Cement kilns shall not be used to incinerate heavy metal hazardous wastes. Cement kiln incineration of medical waste shall comply with the requirements of the Technical Specifications for Centralized Disposal of Medical Waste. When cement kilns are utilized to incinerate hazardous wastes, the flue gas treatment of the cement kiln or kiln-grinding machine shall adopt high-efficiency bag filter. Monitoring Monitoring of air pollutants in the exhaust pipe The exhaust pipe of the production equipment shall be equipped with permanent sampling holes and meet the sampling conditions stipulated in GB/T 16157. Monitoring sampling of particulate matter or gaseous pollutants in the exhaust pipe shall be carried out according to GB/T 16157. For daily supervisory monitoring, the working conditions during sampling should be the same as the normal working conditions at that time. The personnel of the emission unit and the implementation of monitoring personnel shall not arbitrarily change the operating conditions at that time. The average value shall be obtained by sampling for any consecutive 1-hour period, or more than 3 samples shall be collected at equal time intervals in any 1-hour period and the average value shall be calculated. The working condition requirements and sampling time frequency for the monitoring of the completion of environmental protection facilities of construction projects shall be implemented according to the methods and specifications for the monitoring of the completion of environmental protection facilities of construction projects formulated by the State Environmental Protection Administration. The analytical methods for air pollutants in cement industry are shown in Table 5.
No. Analytical items Manual analytical methods Automatic analytical methods 1 Particulate matter GB／T 16157 Weight method HJ／T 76 Technical requirements and detection methods for continuous monitoring system of flue gas emission from stationary sources 2 Sulfur dioxide HJ／T 56 Iodine method HJ／T 57 Potentiostatic electrolysis 3 Nitrogen oxides HJ／T 42 Ultraviolet spectrophotometric photometric method HJ／T 43 UV spectrophotometric method HJ／T 43 Ethylenediamine Naphthalene Hydrochloride Spectrophotometric Method 4 Fluoride HJ／T 67 Ion Selective Electrode Method - 5 Dioxin HJ／T 77 Chromatography-Mass Spectrometry Method - For the new, reformed and expanded cement production lines, the exhaust pipe (kiln end) of cement kilns and kiln mills should be installed with continuous monitoring system for flue gas particulate matter, sulfur dioxide and nitrogen oxides. The new cement production line, the cement kiln and kiln mill exhaust (kiln end) shall be installed with continuous monitoring device for flue gas particulate matter, sulfur dioxide and nitrogen oxides; the cooler exhaust (kiln head) shall be installed with continuous monitoring device for flue gas particulate matter; for the existing cement production line, continuous monitoring device shall be installed in accordance with the regulations of the local environmental protection administrative department. The continuous monitoring device shall meet the requirements of HJ/T 76 "Technical Requirements and Testing Methods of Flue Gas Continuous Monitoring System for Emissions from Fixed Pollution Sources". After the continuous monitoring device for flue gas emission has been accepted by the administrative department for environmental protection of the people's government at or above the county level, its monitoring data shall be valid during the validity period. The hourly average value is used as the basis for continuous monitoring to meet the standard assessment. Monitoring of unorganized emission of particulate matter outside the plant boundary 20m outside the plant boundary (no obvious plant boundary, 20m outside the workshop) upwind and downwind sampling at the same time, the monitoring data of the upwind side as a reference value. The monitoring is carried out according to the provisions of HJ/T 55 "Technical Guidelines for Monitoring Unorganized Emissions of Air Pollutants". Particulate matter analysis method GB / T 15432 "ambient air determination of total suspended particulate matter weight method". This standard is supervised and implemented by the administrative departments of environmental protection of the people's governments at or above the county level. The local environmental protection administrative department shall, according to the requirements of environmental management, consider the structural adjustment of cement industry and enterprises to meet the standard, formulate the installation plan of continuous monitoring devices for the flue gas of the existing cement production line and announce it. The environmental protection departments of the people's governments of provinces, autonomous regions and municipalities directly under the central government may, according to the needs of local environmental management, submit to the provincial people's government for approval and report to the state environmental protection administrative department for the record, and implement the limits specified in Table 1 or Table 2 in advance.