Treatment method of non-ferrous metal smelting wastewater
A technology of non-ferrous metals and treatment methods, applied in the field of simultaneous removal of various pollutants, can solve the problems of electro-flocculation electrode corrosion, high treatment cost, complex components, etc. simple craftsmanship
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Embodiment 1
[0052] Take tungsten smelting wastewater from a tungsten smelting plant in Jiangxi. The pH value of the wastewater is 3.4, the NaCl content is 15g / L, the COD is 336mg / L, the ammonia nitrogen is 73mg / L, the fluoride is 85mg / L, and the total phosphorus is 13mg / L. , The total arsenic is 4.4mg / L, and the concentration of related pollutants exceeds the requirements of the national standard "Comprehensive Wastewater Discharge Standard 8978-1996" (COD<100mg / L, ammonia nitrogen <15mg / L, fluoride <10mg / L, Total phosphorus <0.5mg / L, total arsenic <0.5mg / L).
[0053] Preprocessing:
[0054] First, 1 g / L of lime was added to the waste water for pretreatment, and the pH of the waste water was adjusted to 9.5, followed by sedimentation and solid-liquid separation. After pretreatment, the NaCl content of wastewater was 15g / L, COD was 288mg / L, ammonia nitrogen was 70mg / L, fluoride was 28mg / L, total phosphorus was 3.8mg / L, and total arsenic was 2.5mg / L. The pretreated wastewater is then sent...
Embodiment 2
[0062] Take tungsten smelting wastewater from a tungsten smelting plant in Jiangxi. The pH value of the wastewater is 3.4, the NaCl content is 15g / L, the COD is 336mg / L, the ammonia nitrogen is 73mg / L, the fluoride is 85mg / L, and the total phosphorus is 13mg / L. , The total arsenic is 4.4mg / L, and the concentration of related pollutants exceeds the requirements of the national standard "Comprehensive Wastewater Discharge Standard 8978-1996" (COD<100mg / L, ammonia nitrogen <15mg / L, fluoride <10mg / L, Total phosphorus <0.5mg / L, total arsenic <0.5mg / L).
[0063] First, 1 g / L of lime was added to the wastewater for pretreatment, and the pH of the wastewater was adjusted to 9.5, followed by sedimentation and solid-liquid separation. After pretreatment, the NaCl content of wastewater was 15g / L, COD was 288mg / L, ammonia nitrogen was 70mg / L, fluoride was 28mg / L, total phosphorus was 3.8mg / L, and total arsenic was 2.5mg / L. The pretreated wastewater is then sent to an electrochemical syst...
Embodiment 3
[0066] Take tungsten smelting wastewater from a tungsten smelting plant in Jiangxi. The pH value of the wastewater is 2.5, the NaCl content is 12g / L, the COD is 196mg / L, the ammonia nitrogen is 45mg / L, the fluoride is 156mg / L, and the total phosphorus is 21mg / L. , The total arsenic is 6.7mg / L, and the concentration of relevant pollutants exceeds the requirements of the national standard "Comprehensive Wastewater Discharge Standard 8978-1996" (COD<100mg / L, ammonia nitrogen <15mg / L, fluoride <10mg / L, Total phosphorus <0.5mg / L, total arsenic <0.5mg / L).
[0067] First, 1.5 g / L of tungsten smelting slag was added to the wastewater for pretreatment, and the pH of the wastewater was adjusted to 10.0, followed by sedimentation and solid-liquid separation. After pretreatment, the NaCl content of wastewater was 12g / L, COD was 180mg / L, ammonia nitrogen was 45mg / L, fluoride was 23mg / L, total phosphorus was 2.4mg / L, and total arsenic was 1.7mg / L. The pretreated wastewater is then sent to ...
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