Method for removing high concentration phosphorus in glyphosate wastewater

A glyphosate wastewater and high-concentration technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, biological water/sewage treatment, etc., can solve problems such as poor stability, high cost, and low removal effect of high-concentration phosphorus

Inactive Publication Date: 2014-07-02
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the shortcomings of poor stability, high cost, and low removal effect of high-concentration phosphorus in the prior art, the present invention provides a method for removing high-concentration phosphorus in glyphosate wastewater for glyphosate wastewater

Method used

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  • Method for removing high concentration phosphorus in glyphosate wastewater
  • Method for removing high concentration phosphorus in glyphosate wastewater
  • Method for removing high concentration phosphorus in glyphosate wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] First add a certain amount of one of sodium thiosulfate, sodium borohydride, and stannous chloride to the glyphosate wastewater as a reducing agent to maintain the dissolved oxygen in the wastewater at 0.3mg / L; Add extracellular hydrolase and nicotinamide adenine dinucleotide phosphate, keep the temperature of the wastewater at 35°C for 38 hours; then use one of caustic soda and calcium hydroxide as an alkali to adjust the pH value of the wastewater to 7.3; Add 350ppm of polyaluminum iron phosphate and polyaluminum iron phosphate to the wastewater as an inorganic polymer flocculant for flocculation and sedimentation; add 100ppm of sodium hypochlorite and 65ppm of polyepoxy amber to the wastewater after sedimentation Acid, 70ppm glycerol, inject into the high-pressure container, and blow into the air, so that the total pressure in the container is maintained at 5.0MPa; finally, open the high-pressure container channel, release the waste water into the pool, form a white m...

Embodiment 2

[0025] First add a certain amount of one of sodium thiosulfate, sodium borohydride and stannous chloride as a reducing agent to the glyphosate wastewater to maintain the dissolved oxygen in the wastewater at 0.5mg / L; Add extracellular hydrolase and nicotinamide adenine dinucleotide phosphate to the solution, keep the temperature of the wastewater at 37°C for 45 hours; then use one of caustic soda and calcium hydroxide as an alkali to adjust the pH value of the wastewater to 7.8; Add 450ppm of polyaluminum iron phosphate and polyaluminum iron phosphate to the wastewater as an inorganic polymer flocculant for flocculation and sedimentation; add 150ppm of sodium hypochlorite and 95ppm of polyepoxy amber to the wastewater after sedimentation Acid, 75ppm glycerol, injected into the high-pressure container, and blown into the air, so that the total pressure in the container is maintained at 5.9MPa; finally, open the high-pressure container channel, release the waste water into the po...

Embodiment 3

[0029] First add a certain amount of one of sodium thiosulfate, sodium borohydride and stannous chloride as a reducing agent to the glyphosate wastewater to maintain the dissolved oxygen in the wastewater at 0.4mg / L; Add extracellular hydrolase and nicotinamide adenine dinucleotide phosphate to keep the waste water temperature at 36°C for 40°C; then use one of caustic soda and calcium hydroxide as alkali to adjust the pH value of waste water to 7.3; Add 400ppm of polyaluminum ferric phosphate and polyaluminum ferric silicate as an inorganic polymer flocculant for flocculation and sedimentation; add 120ppm of sodium hypochlorite and 70ppm of polyepoxysuccinic acid to the wastewater after sedimentation , 70ppm glycerol is injected into the high-pressure container, and air is blown in to keep the total pressure in the container at 5.8MPa; finally, the channel of the high-pressure container is opened to release the waste water into the pool, forming a white mist-like foam, which is...

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Abstract

The invention discloses a method for removing high concentration phosphorus in glyphosate wastewater. The method comprises the following steps: adding a reducing agent to the glyphosate wastewater firstly, then adding hydrolytic enzyme and coenzyme to convert organic phosphorus into inorganic phosphorus; then using alkali to adjust PH and adding inorganic polymer flocculant for flocculating settling; adding sodium hypochlorite, polyethylene succinic acid and glycerol to the settled wastewater, injecting the wastewater into a high pressure vessel and drumming air into the vessel to maintain the total pressure in the range of 5.0-6.0MPa; finally, open a container channel to release the wastewater into a pond to form white mist foam. A layer of greasy substance generated in the upper part of the pond can be removed by a slag adhering machine. The method provided by the invention does not have to convert organic phosphorus into inorganic phosphorus through the hydrolysis of hydrolytic enzyme and coenzyme at the high pressure and high temperature condition, the inorganic polymer flocculant added has selectivity. The method provided by the invention can reduce the concentration of phosphorus in glyphosate wastewater to 0.5mg / L or less. And the removal efficiency of phosphorus can reach more than 99.9%.

Description

technical field [0001] The invention relates to a method for removing high-concentration phosphorus in glyphosate wastewater, belonging to the field of sewage treatment. Background technique [0002] For phosphorus removal, the commonly used treatment methods at home and abroad can be divided into biochemical methods, chemical precipitation methods, etc. Biochemical methods have low operating costs, but strict operating requirements and poor stability; chemical precipitation methods are by far the most effective and stable. Phosphorus removal technology, but the chemical cost is expensive and the sludge output is large. In order to overcome the deficiencies of the prior art, for glyphosate wastewater, the publication number is CN102173518A, and the name is "Glyphosate Wastewater Phosphorus Removal Treatment Method", a treatment including alkaline hydrolysis pretreatment, Fenton oxidation and catalytic oxidation precipitation is proposed method, its components are destroyed ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F3/00C02F1/52
Inventor 雷春生麦源珍
Owner CHANGZHOU UNIV
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