Method for deeply removing organic phosphorus from wastewater

A technology for organic phosphorus and wastewater, applied in chemical instruments and methods, water pollutants, water/sewage multi-stage treatment, etc. Large volume and other problems, to achieve the effect of synergistic removal, mild reaction conditions, and low operating costs

Active Publication Date: 2018-01-09
BEIJING GEOENVIRON ENG & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems in the prior art that the dosage of the medicament is too large, the reaction conditions are harsh, the removal effect of the low-concentration organic phosphorus substances in the waste water is poor, and the large-scale application cannot be carried out in the actual waste water treatment project.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Take the boiler circulating sewage containing organic phosphorus, the initial total phosphorus is 5.0mg / L, based on the volume of the sewage, add 100g / L of porous molecular sieve catalyst loaded with copper oxide and a particle size of 0.5mm, and adjust the sewage with dilute sulfuric acid The pH value of the solution is 8, feed 100mg / L of ozone gas, add 20mg / L concentration of 28% hydrogen peroxide, and react at room temperature for 0.5 hours.

[0029] After the reaction, the organic phosphorus content in the detected waste water is lower than 0.1mg / L, and the removal rate is greater than 97%. After the oxidation treatment, the total concentration of 200mg / L polyaluminum and PAM mixture was added to the wastewater. After precipitation and filtration, the total phosphorus in the wastewater was reduced to 0.23mg / L.

Embodiment 2

[0031] Take the boiler circulating sewage containing organic phosphorus, the initial total phosphorus is 5.0mg / L, based on the volume of the sewage, add 200g / L of porous molecular sieves loaded with iron oxide and a particle size of 1.0mm, and adjust the concentration of the sewage with dilute sulfuric acid The pH value is 9, feed 120mg / L of ozone gas, add 30mg / L of sodium persulfate, and react at room temperature for 1 hour.

[0032] After the reaction, the organic phosphorus content in the detected waste water is lower than 0.08mg / L, and the removal rate is greater than 98%. After the oxidation treatment, the total concentration of 150mg / L poly-iron and polyaluminum mixed agent was added to the wastewater. After sedimentation and filtration, the total phosphorus in the wastewater was reduced to 0.24mg / L.

Embodiment 3

[0034] After biochemical treatment, the production wastewater of a pesticide factory that produces glyphosate by the alkyl ester method has an initial total phosphorus of 42 mg / L. Based on the volume of the sewage, 500 g / L of nickel oxide and copper oxide are added, and the particle size is 0.2 mm. Porous molecular sieve, adjust the pH value of the sewage with dilute sulfuric acid to 8.5, feed 1000mg / L of ozone gas, add 100mg / L of 28% hydrogen peroxide and 150mg / L of sodium persulfate, and react at room temperature for 1.5 hours.

[0035] After the reaction is finished, it is detected that the organic phosphorus content in the waste water is lower than 0.22mg / L, and the removal rate is greater than 99%. Add 1500mg / L of ferric chloride to the wastewater after oxidation treatment, and after sedimentation and filtration, the total phosphorus in the wastewater is reduced to 0.43mg / L.

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Abstract

The invention discloses a method for deeply removing organic phosphorus from wastewater. The method comprises steps as follows: under the condition of pH being 7.0-9.0 and in the presence of a catalyst, ozone is added to the wastewater, a pro-oxidant is added optionally, and an oxidizing reaction is performed; a phosphorous removing agent is added for coagulating sedimentation. According to the method, the reaction is performed under the condition of pH being 7.0-9.0, reaction conditions are mild, and operating cost is lower; the wastewater containing organic phosphorus is subjected to oxidation treatment by a strong oxidant, organic phosphorus in the wastewater is effectively removed, and with addition of the phosphorous removing agent, removal rate of organic phosphorus is higher than 99% and total phosphorus in the wastewater can be reduced to 0.3 mg / L or lower; the problems that organic phosphorus is difficult to remove completely and total phosphorus cannot meet the standard are solved, and the method can be widely applied to standard treatment of various kinds of wastewater containing organic phosphorus.

Description

technical field [0001] The invention belongs to the field of environmental engineering wastewater treatment, and more specifically relates to a method for deep removal of organic phosphorus in wastewater. Background technique [0002] In recent years, with the rapid development of the national economy, water environment protection is a problem that is widely concerned by the current human society. Phosphorus in water is a key element needed for the growth of algae. Excessive phosphorus is the main cause of polluted water, eutrophication of lakes and red tides in bays. Therefore, environmental protection standards have very high requirements for total phosphorus restrictions. For example, in the first-class A standard in GB18918-2002, it is required that the effluent TP≤0.5mg / L; while some local standards (DB12599-2015) require that the effluent of sewage treatment plants be TP ≤0.3mg / L. [0003] Industrial wastewater containing organic phosphorus will be discharged from in...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F101/30
Inventor 李骎赵静汤克敏甄胜利刘泽军谭金
Owner BEIJING GEOENVIRON ENG & TECH
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