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Method for recovering phosphate in town sewage by using resin loaded with hydrous zirconium oxide

A technology for hydrating zirconia and urban sewage, which is applied in water/sewage treatment, chemical instruments and methods, adsorbed water/sewage treatment, etc. It can solve problems such as no research reports, and achieve stable chemical properties, good effect and low price. Effect

Active Publication Date: 2019-03-22
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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  • Method for recovering phosphate in town sewage by using resin loaded with hydrous zirconium oxide
  • Method for recovering phosphate in town sewage by using resin loaded with hydrous zirconium oxide
  • Method for recovering phosphate in town sewage by using resin loaded with hydrous zirconium oxide

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Dissolve 15g of zirconium oxychloride octahydrate in a mixed solution of 100ml of HCl and ethanol, wherein the volume fraction of HCl is 5%, the volume fraction of ethanol is 30%, and the rest is water. Then 5 g of D280 resin was added, followed by continuous stirring at 50°C for 24 hours. Then the D280 resin loaded with zirconium was filtered and added to 50 ml of NaOH solution with a mass fraction of 5%, and the mixture was continuously stirred for 24 hours. Zirconium hydroxide will gradually form a precipitate in the resin D280; then rinse the D280 resin containing zirconium hydroxide with deionized water until the pH of the effluent is 6.5-7.5; then rinse with 50ml of alcohol; finally the D280 resin loaded with zirconium hydroxide Heat at 60°C for 12 hours. It can be made into finished resin D280-Zr loaded with hydrated zirconia.

[0031]The effect of pH on the adsorption performance of D280-Zr: Prepare 1L of phosphate solution and put it into ten 150ml Erlenmeyer...

Embodiment 2

[0033] Dissolve 15g of zirconium oxychloride octahydrate in a mixed solution of 100ml of HCl and ethanol, wherein the volume fraction of HCl is 5%, the volume fraction of ethanol is 30%, and the rest is water. Then 5 g of D280 resin was added, followed by continuous stirring at 50°C for 24 hours. Then the D280 resin loaded with zirconium was filtered and added to 50 ml of NaOH solution with a mass fraction of 5%, and the mixture was continuously stirred for 24 hours. Zirconium hydroxide will gradually form a precipitate in the resin D280; then rinse the D280 resin containing zirconium hydroxide with deionized water until the pH of the effluent is 6.5-7.5; then rinse with 50ml of alcohol; finally the D280 resin loaded with zirconium hydroxide Heat at 60°C for 12 hours. It can be made into finished resin D280-Zr loaded with hydrated zirconia.

[0034] Selection of reaction temperature: configure 400ml of phosphate solution, put them in four 150ml conical flasks respectively, p...

Embodiment 3

[0036] Dissolve 15g of zirconium oxychloride octahydrate in a mixed solution of 100ml of HCl and ethanol, wherein the volume fraction of HCl is 5%, the volume fraction of ethanol is 30%, and the rest is water. Then 5 g of D280 resin was added, followed by continuous stirring at 50°C for 24 hours. Then the D280 resin loaded with zirconium was filtered and added to 50 ml of NaOH solution with a mass fraction of 5%, and the mixture was continuously stirred for 24 hours. Zirconium hydroxide will gradually form a precipitate in the resin D280; then rinse the D280 resin containing zirconium hydroxide with deionized water until the pH of the effluent is 6.5-7.5; then rinse with 50ml of alcohol; finally the D280 resin loaded with zirconium hydroxide Heat at 60°C for 12 hours. It can be made into finished resin D280-Zr loaded with hydrated zirconia.

[0037] The choice of dosage: through Example 1 and Example 2, the optimum reaction pH of D280-Zr is 6.5, and the optimum reaction temp...

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Abstract

The invention discloses a method for recovering phosphate in town sewage by using resin loaded with hydrous zirconium oxide, and belongs to the technical field of treatment of urban sewage. The methodis characterized in that for 4-12mg / L of lower concentration of phosphorus in urban domestic sewage, eutrophication of a water body is easily caused in rivers or lakes due to discharged phosphorus, and the current chemical precipitation method and biological phosphorus-removing method cannot meet stricter and stricter phosphorus discharging requirements, therefore, a high and new technology is desired to enhance removal of the phosphorus in effluents. The method disclosed by the invention has the beneficial effects that the resin D280 loaded with the hydrous zirconium oxide is adopted to recover the phosphate in the town sewage, and when the temperature is 25-30 DEG C and the pH is 6-7, the adsorption capability of D280-Zr can reach 97-100%; further, when containing competitive negative ions, D280-Zr still represents better adaptability and adsorption property; after 6 times of adsorption and desorption circulations, the adsorption rate of D280-Zr can still be maintained at 80% or more; therefore, by adoption of the resin material, the energy consumption can be saved, and further the method has more application value.

Description

technical field [0001] The invention relates to a method for recovering phosphate in urban sewage by a resin loaded with hydrated zirconia, which belongs to the field of water pollution control and resource regeneration and utilization, and is used for phosphorus removal and phosphorus recovery in sewage treatment. Background technique [0002] Phosphorus exists in nature mainly in the form of natural phosphate ore, which is widely used in chemical industry, light industry, national defense and other departments after processing and biotransformation. It is a non-renewable resource that is facing depletion. Phosphorus content is extremely sensitive to water eutrophication. When C(TP)>0.015mg / L in water is enough to cause water eutrophication, the concentration of phosphorus in urban sewage in my country is generally 5-9mg / L. In order to avoid eutrophication of water bodies, sewage treatment plants often use a combination of chemical precipitation and biological phosphoru...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28B01J20/26B01J20/30C02F101/10
CPCB01J20/06B01J20/26C02F1/285C02F2101/105
Inventor 曾薇许欢欢李帅帅彭永臻
Owner BEIJING UNIV OF TECH
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