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Method for treating phosphorus-containing waste water

A wastewater and pretreatment technology, applied in water/sewage treatment, neutralized water/sewage treatment, oxidized water/sewage treatment, etc., can solve the problems of increased treatment cost, easy oxidation, poor treatment effect, etc. The effect of dealing with stress, good social and economic benefits

Active Publication Date: 2013-05-29
ZHEJIANG XINAN CHEM INDAL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Phosphorus-containing products, especially organic phosphorus products, produce different wastewater in each link, some are easy to oxidize and some are not easy to oxidize. Increased costs and poor handling effects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The result of water quality analysis before treatment was glyphosate wastewater with a total phosphorus concentration of 3189 mg / L.

[0038]Pass the glyphosate wastewater into the adjustment tank, use sulfuric acid to adjust the pH of the wastewater to 0.5, then pass the wastewater into the micro-electrolysis reactor, and aerate the bottom to react. After 24 hours of reaction, the wastewater is discharged into the coagulation sedimentation tank and added Lime to pH = 8, the amount of lime added is 25kg / t of waste water, PAM (polyacrylamide) is added for coagulation and precipitation, and the amount of PAM added is 0.01kg / t of waste water. Filtered and sent out for processing. The total phosphorus content of the supernatant was 85mg / L, and it entered the adjustment tank, adding sulfuric acid to adjust the pH value to 3, then entering the oxidation tank, adding Fenton reagent, the input amount was 5kg / t waste water, and oxidized for 1h. Add lime to the oxidized wastewate...

Embodiment 2

[0040] The result of the water quality analysis before treatment is that the total phosphorus concentration is 2070mg / L of bisglyphosate wastewater.

[0041] Pass the bisglyphosate wastewater into the adjustment tank, use sulfuric acid to adjust the pH of the wastewater to 0.5, then pass the wastewater into the micro-electrolysis reactor, and react with aeration at the bottom. After 12 hours of reaction, the wastewater is discharged into the coagulation sedimentation tank and added Lime to pH = 8, the amount of lime added is 18kg / t of waste water, PAM (polyacrylamide) is added for coagulation and precipitation, and the amount of PAM added is 0.01kg / t of waste water. After precipitation, the iron phosphate and calcium salts in the lower layer are precipitated Filtered and sent out for processing. The total phosphorus content of the supernatant was 65mg / L, and it entered the adjustment tank, added sulfuric acid to adjust the pH value to 3, entered the oxidation tank, added Fento...

Embodiment 3

[0043] The result of water quality analysis before treatment was glyphosate process wastewater with a total phosphorus concentration of 480mg / L.

[0044] Pass the glyphosate wastewater into the adjustment tank, adjust the pH of the wastewater to 3 with sulfuric acid, enter the oxidation tank, add Fenton reagent, the input amount is 3kg / t wastewater, and oxidize for 1h. Add PAC (polyaluminium chloride) 3kg / t wastewater to the oxidized wastewater, add liquid alkali to adjust the pH to 7, then add PAM0.01kg / t wastewater, after coagulation and precipitation, the total phosphorus content in the supernatant is 56.9mg / L, the removal rate was 93.45%. Discharge the supernatant into the adjustment tank, adjust the pH to 3 with sulfuric acid, and enter the oxidation tank for secondary oxidation. The input amount of Fenton reagent is 2kg / t of waste water, oxidize for 1h, add lime to the oxidized waste water to adjust the pH to 8, lime Addition amount is 1.5kg / t waste water, add PAM0.01k...

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Abstract

The invention discloses a method for commprehensively treating phosphorus-containing waste water. The method mainly comprises the steps of: classifying waste water with total phosphorus concentration being 20-10000mg / L generated in a factory; for different types of phosphorus-containing waste water, carrying out different combined pre-treatment of more than two of iron-carbon micro-electrolysis, oxidation, coagulating sedimentation, lime stone neutralization and the like; and afterwards, further carrying out biochemical treatment so that the waste water reaches the emission standard with TP (Total Phosphorus) being smaller than or equal to 0.5mg / L.

Description

technical field [0001] The invention relates to a treatment method for phosphorus-containing wastewater, which is suitable for the production of organophosphorus pesticides and other products such as: glyphosate, bisglyphosate, phosphorus trichloride, phosphorus oxychloride, phosphoric acid esters and phosphite esters , Phosphorus-based flame retardants, phosphate and other products in the production process of waste water containing high organic phosphorus and inorganic phosphorus, the total phosphorus concentration is 20 ~ 10000mg / L. Background technique [0002] Total phosphorus is one of the most critical factors causing eutrophication of water bodies. In order to prevent eutrophication of water bodies, my country's requirements for enterprise wastewater discharge are becoming more and more stringent. At present, most enterprises implement the first-level standard stipulated in the comprehensive sewage discharge standard GB8978-96, that is, the allowable discharge concen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F1/461C02F1/52C02F1/72C02F1/66
Inventor 王伟周曙光任不凡詹波朱建民揭少卫祝小红华英徐志宏游思春季旻崔小芳
Owner ZHEJIANG XINAN CHEM INDAL GROUP
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