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Treatment method of high-concentration organic phosphorus waste water

A treatment method, organic phosphorus technology, applied in water/sewage treatment, neutralized water/sewage treatment, multi-stage water/sewage treatment, etc. Harsh conditions and other problems, to achieve the effect of improving the recycling rate of magnetic powder, reducing the amount of magnetic powder, and increasing the density of magnetic powder

Inactive Publication Date: 2017-06-23
CAMBRIDGE ENVIRONMENTAL CHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, the country has higher requirements on the discharge of phosphorus (the first-level discharge standard of phosphorus in "Comprehensive Wastewater Discharge Standard" GB8978-1996 is 0.5mg / L; on the other hand, the organic phosphorus chain is interrupted and transformed into inorganic phosphorus. Most of the methods used are relatively expensive, which is difficult for ordinary enterprises to bear
[0003] Existing methods for removing organic phosphorus in sewage include coagulation-sedimentation method, physical-chemical method, chemical oxidation method + coagulation-sedimentation method. The above-mentioned phosphorus removal methods or reaction conditions are harsh, and equipment corrosion, operation, investment, and operation and maintenance all face challenges. Big technical, economical and safety problems; or only suitable for removing low-concentration organic phosphorus in wastewater, the removal effect for high-concentration organic phosphorus is unstable, and cannot meet the treatment and discharge requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The average COD of the sewage to be treated is 350.6mg / L, the average organic phosphorus concentration is 33.6mg / L, and the average total phosphorus concentration is 52.1mg / L.

[0025] Sewage is treated in the following steps:

[0026] S1: Transformation of organophosphorus, pass the waste water containing organic phosphorus into the reactor, use hydrochloric acid to adjust the pH of the waste water containing organophosphorus to 4, add an organic phosphorus conversion agent into the reactor, mix the organic phosphorus conversion agent with the wastewater, Stir at 300r / min at 20°C for 3 hours to convert organic phosphorus into inorganic phosphorus; the organic phosphorus conversion agent includes hydrogen peroxide and ferroferric oxide magnetic powder; wherein the mass ratio of hydrogen peroxide to waste water containing organic phosphorus is 0.001:1 , the content of magnetic powder in wastewater is 20mg / L, and the particle size of magnetic powder is 40μm;

[0027] The...

Embodiment 2

[0032] The average COD of the sewage to be treated is 512.3mg / L, the average concentration of organic phosphorus is 58.6mg / L, and the average concentration of total phosphorus is 78.6mg / L.

[0033] Sewage is treated in the following steps:

[0034] S1: Transformation of organophosphorus, pass the waste water containing organic phosphorus into the reactor, use hydrochloric acid to adjust the pH of the waste water containing organic phosphorus to 5, add an organophosphorus conversion agent into the reactor, mix the organic phosphorus conversion agent with the wastewater, Stir at 400r / min at 20°C for 4 hours to convert organic phosphorus into inorganic phosphorus; the organic phosphorus conversion agent includes hydrogen peroxide and ferroferric oxide magnetic powder; wherein the mass ratio of hydrogen peroxide to waste water containing organic phosphorus is 0.002:1 , the content of magnetic powder in wastewater is 90mg / L, and the particle size of magnetic powder is 40μm;

[003...

Embodiment 3

[0040] The average COD of the sewage to be treated is 213.6mg / L, the average organic phosphorus concentration is 25.3mg / L, and the average total phosphorus concentration is 30.9mg / L.

[0041] Sewage is treated in the following steps:

[0042]S1: Transformation of organophosphorus, pass the waste water containing organophosphorus into the reactor, use hydrochloric acid to adjust the pH of the waste water containing organophosphorus to 4.5, add an organophosphorus conversion agent into the reactor, mix the organophosphorus conversion agent with the waste water, Stir at 350r / min at 20°C for 5 hours to convert organic phosphorus into inorganic phosphorus; the organic phosphorus conversion agent includes hydrogen peroxide and ferroferric oxide magnetic powder; wherein the mass ratio of hydrogen peroxide to waste water containing organic phosphorus is 0.002:1 , the content of magnetic powder in wastewater is 500mg / L, and the particle size of magnetic powder is 80μm;

[0043] The co...

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Abstract

The invention provides a treatment method of high-concentration organic phosphorus waste water. The treatment method comprises the following steps: S1. Leading organic phosphorous-containing waste water into a reactor, adding organic phosphorous converter into the reactor, mixing the organic phosphorous conversion agent with waste water to convert organic phosphorous into inorganic phosphorous, wherein the organic phosphorous conversion agent comprises hydrogen peroxide and magnetic powder; S2. Leading waste water, treated in the step S1, into a phosphorous removal reactor, sequentially putting a coagulant and a flocculating agent sequentially into the phosphorous removal reactor, and stirring to form a magnetic phosphorous-containing floccules; and S3. Leading the magnetic phosphorous-containing floccules, generated in the step S2, to enter a precipitation pool to form chemical sludge precipitate, powerfully stirring and dissipating the chemical sludge through a high-speed shearing machine and then recycling magnetic powder through a magnetic drum separator, leading the recycled magnetic powder to return to the step 1 for continuously participating the reaction, and leading the remaining sludge to enter the sludge treatment system. the double purposes of promoting the conversion of organic phosphorous and removing the phosphorous by utilizing the magnetic-coagulation clarifying technology can be achieved only by adding once magnetic powder, and the organic phosphorous on the waste water can be simply and efficiently removed.

Description

technical field [0001] The invention belongs to the field of environmental protection sewage treatment, and in particular relates to a treatment method for high-concentration organic phosphorus waste water. Background technique [0002] Phosphorus is an important cause of water eutrophication, and the treatment of high-concentration organic phosphorus wastewater has always been a difficult problem for industrial enterprises. Although the research on high-concentration organic phosphorus has not been interrupted, there is no method with good treatment effect and low cost. On the one hand, the country has higher requirements on the discharge of phosphorus (the first-level discharge standard of phosphorus in "Comprehensive Wastewater Discharge Standard" GB8978-1996 is 0.5mg / L; on the other hand, the organic phosphorus chain is interrupted and transformed into inorganic phosphorus. Most of the methods used are relatively expensive, which is difficult for ordinary enterprises to...

Claims

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Application Information

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IPC IPC(8): C02F9/12C02F11/00C02F101/30
CPCC02F1/48C02F1/5245C02F1/56C02F1/66C02F1/722C02F1/725C02F9/00C02F11/00C02F2001/007C02F2101/30
Inventor 黑国翔华英豪张航龙
Owner CAMBRIDGE ENVIRONMENTAL CHINA CO LTD