This standard stipulates the maximum allowable discharge concentration and drainage volume of water pollutants in the textile dyeing and finishing industry based on the destination of wastewater discharge from textile dyeing and finishing enterprises. This standard applies to the emission management of textile dyeing and finishing industrial enterprises, as well as the environmental impact assessment, design, completion acceptance and post-completion emission management of construction projects. This standard does not apply to wastewater generated from processes such as wool scouring, hemp degumming, cocoon cooking, and chemical fiber raw material cooking. GB 4287-1992 Water Pollutant Emission Standard for Textile Dyeing and Finishing Industry GB4287-1992 Standard download and decompression password: www.bzxz.net

National Standard of the People's Republic of China
-88
Textile printing and dyeing industry part
In order to implement the Environmental Protection Law of the People's Republic of China, the Water Pollution Prevention and Control Law of the People's Republic of China and the Marine Environmental Protection Law of the People's Republic of China, promote the textile dyeing and finishing industry This standard is formulated based on the advancement of production technology and pollution control technology, and the prevention and control of water pollution. 1 Topic content and scope of application
1.1 Topic content
This standard stipulates the maximum allowable discharge concentration and drainage volume of water pollutants in the textile dyeing and finishing industry based on the destination of wastewater discharge from textile dyeing and finishing enterprises.
1.2 Scope of application
This standard applies to the emission management of textile dyeing and finishing industrial enterprises, as well as the environmental impact assessment, design, completion acceptance and post-completion emission management of construction projects.
This standard does not apply to wastewater generated from wool scouring, hemp degumming, boiling, and chemical fiber raw material cooking. 2 Reference standards
GB3097
GB3838
GB6920
GB7467
GB7474
GB7475
GB7478
GB7479
GB7481
GB7488
GB8978
GB11903
Sea water quality standard
Surface water environmental quality standard
pH value Determination of glass electrode method
water quality
water quality
water quality
water quality
water quality
water quality
water quality||tt ||Determination of hexavalent chromium
Diphenylcarbazine spectrophotometrywwW.bzxz.Net
Determination of copper sodium diethyldithiocarbamate spectrophotometry Determination of copper, zinc, lead, cadmium Atomic absorption spectrophotometry Determination of ammonium Distillation and titration method
Determination of ammonium Nessler's reagent colorimetric method
Determination of ammonium Salicylic acid spectrophotometry
Water quality ||tt| |Determination of five-day biochemical oxygen demand (BOD,)
Dilution and inoculation method
Integrated sewage discharge standards
Water quality
Method for determination of color||tt ||GB11914
3 terms
Water quality
Determination of chemical oxygen demand dichromate method
3.1 Dyeing and finishing
for textile materials (fibers, yarns, threads and fabrics) undergo processes based on chemical treatments. Dyeing and finishing include pre-treatment, dyeing, printing and finishing. Commonly known as printing and dyeing.
3.2 Textile textile
Textile industrial products include various types of woven fabrics, non-woven fabrics, various sewing and packaging threads, embroidery threads, wool threads, ropes, belts, etc. National Environmental Protection Administration approved on 1992-05-18 for implementation on 1992-07-01
4 technical content
4.1 standard classification
This standard is divided into three levels:
GB4287— 92
4.1.1 Wastewater discharged into Class II waters in GB3838 (except for water body protection areas) and Class II waters in GB3097 shall comply with Class---level standards. 4.1.2 Wastewater discharged into Class V and V waters in GB3838 and Class III sea areas in GB3097 shall be subject to secondary standards. 4.1.3 Wastewater discharged into urban sewers with secondary sewage treatment plants shall comply with Level 3 standards. 4.1.4 Wastewater discharged into urban sewers without secondary sewage treatment plants must comply with the provisions of 4.1.1 and 4.1.2 respectively according to the functional requirements of the sewer effluent receiving waters. 4.1.5 In the water body protection zones in Class 1, Class II waters and Class I waters in GB3838, and in Class I sea areas in GB3097, new sewage outlets are prohibited. Expansion and reconstruction projects shall not increase the amount of sewage discharge. 4.2 Standard value
This standard stipulates the maximum allowable discharge concentration and the maximum allowable drainage volume of water pollutants in the textile dyeing and finishing industry according to different years. 4.2.1 Textile dyeing and finishing industrial construction projects approved before January 1, 1989 and the enterprises that will be put into operation after completion shall be implemented according to Table 1. Table 1 | |tt | Displacement
m/first meter of cloth
2.5
Biochemical oxygen demand Chemical oxygen demand
(BOD,)
60
80
300
(CODc)
180
240
500
Chroma
(dilution factor)| |tt||80
160
pH value
6~9
69
6~9
suspended solids||tt ||Ammonia spots
100
150
400
25
40
Sulfide "Hexavalent Chromium
1.0
2.0
2.0
0.5
0. 5
0.5
Copper
0.5
1.0
2.0
Anilines
2.0
3.0
5.0
4.2.2 January 1, 1989 to June 1992 Textile dyeing and finishing industrial construction projects approved within 30 days and enterprises put into operation after completion shall be implemented according to Table 2
Table 2
Maximum allowable emission concentration, mg/1
classification.
[Level
Level 1
Level I
Maximum allowable displacement
m\/100 meters of cloth
2.5||tt ||Biochemical oxygen demand Chemical oxygen demand
(BOD,)
30
60
300
(COD)
100
180
500
Chroma
(dilution factor)
50
100
PH value|| tt||6~9
6~9
6~9
suspended solids
nitrogen nitrogen
sulfide hexavalent chromium||tt| |70
150
400
15
25
1.0
1.0
2.0
0.5
0. 5
0.5
shop
0.5
1.0
2.0
4.2.3 July 1, 1992 The textile dyeing and finishing industrial construction projects approved on the 1st and the enterprises put into operation after completion shall be implemented according to Table 3. Aniline
1.0
2.0
5.0
Grading|| tt | |Fengshui District 3
2.2
2.5
Biochemical Oxygen Demand
(BOD.)
25
40||tt ||300
GB 428792
Table 3
Maximum allowable emission concentration, mg/L
Chemical Aerobic Base
(COD)||tt ||100
180
500
Chroma
(dilution factor)
40
80
PH value Suspended solids
6~9
6~9
6~9
70
100
400
Vulcanization Hexavalent chromium
ammonia nitrogen
15
25
1.0
1.0
2.0
0.5||tt| |0.5
0.5
Copper
Aniline
0.5
1.0
2.0
1.0
2.0
5.0 | |tt | Cloth is converted proportionally. 2) Water sources are drawn from the Yangtze River, Yellow River, Pearl River, Xiangjiang River, Songhua River and other large rivers and rivers as water-rich areas; areas drawn from reservoirs, groundwater and areas determined as water-scarce areas by the national water resources administrative department are water-scarce areas. 5 Monitoring
5.1 Sampling point
The sampling point should be at the enterprise's wastewater discharge outlet (hexavalent chromium is discharged from the workshop or workshop treatment facility for sampling). The discharge outlet should be equipped with a wastewater volume measuring device and a permanent mark.
5.2 Sampling frequency
The monitoring frequency is determined according to the production cycle. If the production cycle is within 8 hours, sampling will be done every 2 hours; if the production cycle is greater than 8 hours, sampling will be done every 4 hours. The maximum allowable emission concentration is calculated based on the daily average. 5.3 Displacement
Displacement does not include cooling water and non-production water in the production area, and the maximum allowable drainage is calculated based on the monthly average. 5.4 Statistics
The enterprise's raw material usage, product output, etc. shall be based on the statutory monthly report or annual report. 6 Measurement
The measurement method recommended in this standard is shown in Table 4. Table 4
Serial number
1
2
3
4
5
6
7
Project
Biochemical oxygen demand (BODs)
Chemical oxygen demand (CC>D)
Color
pH value||tt| |Ammonia (NH-N)
Sulfide
Hexavalent chromium
Copper
Measurement method
Dilution and inoculation method
Dichromate method
Dilution factor method
Glass electrode method
Distillation-neutralization titration method
Nessler's reagent colorimetric method
Salicylon Acid spectrophotometry
Iodometric method (high concentration)\)
para-nitrodimethylaniline
colorimetric method (low concentration)
diphenyl carbon Acid dihydrazide spectrophotometry
Atomic absorption spectrophotometry
Method standard number
GB7488
GB11914
GB11903
GB6920|| tt||GB7478
GB7479
GB7481
GB7467
GB7475
Serial number
9
10||tt| |item
item
anilines
chlorine dioxide
GB4287—92
continued table 4
determination method||tt| |Diethyl disulfide amino
Sodium formate spectrophotometry
Diazo coupling colorimetric method or spectrophotometric method 1" continuous titration iodometric method
Note: 1) See "Water and Wastewater Monitoring and Analysis Methods" (Third Edition). China Environmental Science Press. 2) The two analysis methods (1) and (2) in wastewater are temporarily adopted. After the national method standard is released, the national standard shall be implemented. 7 Standard implementation supervision
The environmental protection administrative departments of the people's governments at all levels are responsible for the supervision and implementation of the method standard number
GB7474
A1. Scope of application
GB 428792
Appendix A
Monitoring and analysis method of chlorine dioxide in wastewater
Continuous titration iodometric method
(reference)|| tt||This method is suitable for sub-bleaching equipment and wastewater containing a large amount of chlorite. A2 principle
Chlorine dioxide and nitrite are both oxidants. They can oxidize iodine ions and precipitate iodine, which can then be used. Sodium thiosulfate titration-iodometric method, but under different pH conditions, the oxidation number changes differently. At pH=7, CIO.+I-→C1O+-
I2, the oxidation number changes from 4→+. 3
2
At pH=1～3, C1O+5HI→H++CI-+2H0+2÷I2, the oxidation number changes from 4→-1HCIO, 10 4HI→2I2 10 HCI 10 2H2O, the oxidation number is from 3-→1. Therefore, chlorine dioxide and chlorite can be determined by one-time sampling and continuous titration by controlling different pH values. A3 reagent
A3.1 sodium thiosulfate standard solution: c(NazS,O,)=0.1mol/L. Dissolve 25g sodium thiosulfate (Na2S,O,·5H,O) in 1L newly boiled distilled water, store it for at least two weeks, and then calibrate it with potassium iodate or potassium dichromate. It must be stored for a period of time initially to allow the bisulfite ions contained therein to oxidize. Use boiled distilled water and add a few milliliters of chloroform to minimize bacterial decomposition, and calibrate by either of the following two methods. A3.2 Idate solution: Dissolve 3.249g anhydrous potassium hydrogen iodate (first-grade reagent) or 3.567g potassium iodate (dry at 103 ± 2°C for 1 hour) in distilled water, transfer to a 1000mL volumetric flask and dilute to The marking line is the c=0.10000mol/L solution, which is stored in a bottle with a glass stopper.
In 80mL distilled water, add 1mL concentrated sulfuric acid, 10.00mLc=0.10000mol/L potassium hydrogen iodate and 1g potassium iodide while stirring, immediately use c(Na.S,0)=0.1mol/L solution Drop until light yellow, add 1mL0.5g/100mL starch indicator, and continue dripping until the blue color disappears.
A3.3 dichromate solution: Dissolve 4.904g anhydrous potassium dichromate (first-grade reagent) in distilled water, transfer it to a 1000mL volumetric flask and dilute to the mark, which is c (1/6K , CrO.) = 0.1000mol/L solution, stored in a glass stoppered bottle, replace the iodate standard solution with 10.00mL potassium dichromate standard solution, place it in a dark place for 6 minutes and then use c(Na.S0,) =0.1mol/L solution titration, the method is the same as before. Concentration of sodium thiosulfate (mol/L) = milliliters of sodium thiosulfate consumed A3.4 Sodium thiosulfate standard titrant: Use newly boiled distilled water to dilute the above sodium thiosulfate standard solution to 0.0100 or 0.0500 mol/L.
A3.50.5g/100mL starch indicator: Add a little cold water to 0.5g starch to make a paste, pour into 100mL boiling distilled water, stir, and then settle overnight. Apply the supernatant, add 0.125g salicylic acid and 0.4g zinc chloride for corrosion protection. A3.6 Potassium iodide crystal.
A3.7c(NaOH)=0.1mol/L sodium hydroxide solution: Dissolve 4g sodium hydroxide in 1L distilled water. 43.8 (1+1) sulfuric acid.
A3.9 buffer solution (pH - 7). Weigh 34.0g potassium dihydrogen phosphate and 35.5g disodium hydrogen phosphate in a beaker, add water to dissolve and dilute to 1L
A4 Measurement Steps| | tt | Drop the sodium sulfate solution until it turns light yellow, add 1mL of 0.5g/100mL starch indicator, continue to drip until the blue color disappears, record the reading a, add 3mL (1 + 1) sulfuric acid (pH adjusted to 1 to 3), and the solution It turns blue and continues to drip until it is colorless. The consumption of sodium thiosulfate standard solution is b ml. If the chlorite content is very high, 0.0500mol/L or appropriate concentration sodium thiosulfate standard solution can be used for titration. A5 calculation formula
Fluorine dioxide (CIOzmg/L)=a×67 450V
Chlorite (CIO;,mg/L)=(6-4e)×X67450
V
Where: V - volume of water sample, mL;
c concentration of sodium thiosulfate standard titrant, mol/La - sodium thiosulfate standard titrant consumed in the first titration Volume, mLb Volume of sodium thiosulfate standard titrant consumed in the second titration, mL. A6 References
A6.1 "Foreign Water and Air Quality Standards", translated by Shi Anxiang et al., China Construction Industry Press, 1980. A6.2 "Selection of Foreign Environmental Standards", compiled by Jilin Library, China Standards Press, 1984. A6.3 China-Germany Water Environmental Standards Seminar Materials (Internal), Beijing, October 13-21, 1986. A6.4 "Handbook of Industrial Toxicology", written by Dr. E.R. Pronkett, translated by Zhang Derong, Sichuan Science and Technology Press, 1985. A6.5 "Industrial Toxicology Experimental Methods", abbreviation of industrial "Toxicology Experimental Methods", Shanghai Science and Technology Press, 1979. A6.6 "Determination of Trace Chlorine Dioxide in Air and Water", Xi Danli, Chen Jihua, Zhang Yaojun, Zhu Qinghua, Shanghai Environmental Science, Volume 4, Issue 8, page 29, 1985.
A6.7 "Test on the toxicity of chlorine dioxide (C1O2) to goldfish", Zhang Yichu, Xu Ailian, Environmental Pollution and Prevention p17, 1984. A6.8 "Sodium chlorite bleaching and waste gas detection and treatment", Xu Yuru et al., Journal of Textile Science, 9, 1986. A6.9 "Chlorine Dioxide Toxicity Experiment Report (Internal)", Toxicology Laboratory, Shanghai Institute of Labor Health and Occupational Diseases, April 1985. A6.10 "Survey on the health of workers operating "Ya Piao" (chlorine dioxide)", Shanghai Chemical Industry Occupational Disease Prevention and Control Research Institute, 1986. A611 "Research on Nitrogen Dioxide Waste Gas Treatment (Internal)", Wang Feishan et al., 1986. Additional notes:
GB4287-92
This standard is proposed by the Science and Technology Standards Department of the National Environmental Protection Administration. This standard is drafted by the China Textile University and the Environmental Standards Institute of the Chinese Academy of Environmental Sciences. The main drafters of this standard are Xi Genli, Chen Jihua, Anhua, Gong Mingzu, and Zou Lan. This standard is interpreted by the National Environmental Protection Administration
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