What is the standard for industrial wastewater treatment?

Summary is now China's industrial wastewater discharge standard finishing version of the Daquan, is divided into two parts, the first part of the water, water quality forecast and emission standards and sewage quality forecast and emission standards, the second part of the industry related industries Standard for Standard for Sewage Discharge.
[Part I] Water, Water Quality Forecast and Emission Standards and Sewage Water Quality Forecast and Emission Standards
1. Sewage water volume: leachate volume. Leachate is usually composed of two parts: part of the rain into the landfill to form leachate, and the other part of the landfill waste itself contains moisture by the compaction loss leachate. As a result of the project using rigid program (using reinforced concrete structure), the top of the landfill with steel canopy, rainwater can not enter the landfill to form leachate. Therefore, the leachate produced by the landfill is mainly produced by the compaction of the moisture contained in the landfill waste itself. According to the "Hazardous Waste Landfill Pollution Control Standard" (GB 18595-2001), the water content of landfill waste is less than 85%. Meet the requirements of the hazardous waste water content of their own low, after rolling water loss is not much. Therefore, the amount of leachate produced during the operation is less, and it is conservatively estimated that the amount of leachate produced per day is about 1.0t.
2. Other sewage water. Other production waste water is as follows: the workshop of the washing wastewater 12.0t / d; laboratory wastewater 2.0t / d; a total of 14.0t / d. The total waste water produced by the hazardous waste disposal center is 15t / d. Considering 20% of unforeseen water, the design scale of the wastewater treatment station is 18t / d, 6h per day and 3t per hour.
[Part II]. Wastewater quality prediction and emission standards:
1. The components of landfill waste are very complex and it is difficult to accurately estimate the water quality of the deodorant liquid. However, hazardous wastes entering the landfill shall comply with the "Limits" of the Hazardous Waste Landfill Pollution Control Standard (GB 18598-2001), which is permitted to enter the landfill. Therefore, Water quality.
2. The workshop rinse the sewage and laboratory waste water mainly to flush the ground, equipment and laboratory utensils washed water, sewage contains some heavy metals. Conservative estimates, in addition to SS, the concentration of pollutants in the sewage leachate concentration of 20% of pollutants.
3. According to the production of sewage water and water quality, to determine the quality of water to be processed to see the table. It can be seen from the table that the concentration of organic pollutants in wastewater is low, but heavy metals can cause serious pollution to the environment. According to the requirements of the owners, the production of waste water to remove heavy metals and then Sinotrans treatment. The heavy metal in the treated wastewater meets the three criteria for the "Integrated Wastewater Discharge Standard", "the maximum allowable emission concentration of the first pollutants" and the "second maximum pollutant discharge concentration". Therefore, the primary objective of determining the removal of this sewage treatment project is heavy metal contaminants.
Pollutant mass concentration / (mg · L-1) Pollutant mass concentration / (mg · L-1)
Total mercury 0.06 total nickel 3.80
Total lead 1.27 Total arsenic 0.63
Total cadmium 0.13 Inorganic fluoride 25.33
Total Chromium 3.04 Cyanide 1.27
Six price 0.63 pH 7-12
Total copper 19.00 CODcr 76.00
Total Zinc 19.00 BOD5 25.33
Total beryllium 0.05 NH3-N 38.00
SS 106.67