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Method for treating high-concentration phosphonomycin pharmaceutical wastewater and reclaiming phosphorus

A technology for pharmaceutical wastewater and fosfomycin, applied in chemical instruments and methods, oxidized water/sewage treatment, multi-stage water/sewage treatment, etc., can solve problems such as inability to effectively treat toxic organic pollutants in wastewater, and achieve biochemical Effects of improving sex, eliminating toxicity, and reducing harm

Inactive Publication Date: 2011-01-19
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional physicochemical and biological treatment processes are unable to effectively treat high-concentration refractory toxic organic pollutants in wastewater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The high concentration fosfomycin pharmaceutical wastewater with COD of 74g / L, organic phosphorus of 8.5g / L and total phosphorus of 11.0g / L was treated by the above embodiment.

[0024] 1) Take 800ml of fosfomycin wastewater, inject it into a high-pressure reactor with a volume of 2L, and feed oxygen with a partial pressure of 4.0MPa through a high-pressure oxygen cylinder at a reaction temperature of 300°C, maintain the total system pressure at 10-12.5MPa, and react for 15 minutes. More than 99% of organic phosphorus compounds in wastewater can be decomposed and converted into inorganic phosphates.

[0025] 2) According to Mg: N: P molar ratio 1.1: 1: 1, magnesium chloride and ammonium chloride are added to the wastewater after step 1), and NaOH is added to the solution to maintain the pH value of the reaction system at 8.5, and the reaction is stirred for 30 min. Stand still for 15 minutes, and carry out solid-liquid separation to obtain magnesium ammonium phosphate c...

Embodiment 2

[0028] The high concentration fosfomycin pharmaceutical wastewater with COD of 78g / L, organic phosphorus of 8.9g / L, and total phosphorus of 11.5g / L was treated by the above embodiment.

[0029] 1) Take 500ml of fosfomycin wastewater, inject it into a high-pressure reactor with a volume of 2L, feed oxygen with a partial pressure of 1.0MPa through a high-pressure oxygen cylinder, maintain the total system pressure of 4.0MPa, and react at a reaction temperature of 200°C for 120min. 99% of organic phosphorus is decomposed and converted into inorganic phosphate.

[0030] 2) According to Ca: P molar ratio 2: 1, calcium chloride is added to the wastewater after step 1), and NaOH is added to the solution to maintain the pH value of the reaction system at 9.0, stirred for 30 minutes, left to stand for 30 minutes, and carried out Solid-liquid separation, sediment collection, supernatant for biological treatment to achieve discharge standards.

[0031] Wastewater COD 42g / L after adoptin...

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Abstract

The invention relates to a method for treating high-concentration phosphonomycin pharmaceutical wastewater and reclaiming phosphorus. The method is realized by the following two steps: 1) wet oxidation treatment: filling the high-concentration phosphonomycin pharmaceutical wastewater into a high-pressure reactor with a mechanical stirring device, introducing oxygen or air equivalent to 0.5 to 4 times of the wastewater COD into the high-pressure reactor, and maintaining the total pressure in the reactor to be between 3.0 and 15.0MPa, the reacting temperature to be between 200 and 300 DEG C, and the reaction time to between 5 and 120min to ensure that over 99 percent of organic phosphorus in the wastewater is converted into inorganic phosphate; and 2) phosphate reclaiming: adding calcium salt or magnesium salt and ammonium salt into the wastewater treated in the step 1) based on that the molar ratio of Ca:P is 1.7-2.5:1 or the molar ratio of Mg:N:P is 1.0-1.2:1.0-1.2:1, adding acid / alkali solution into the wastewater to maintain the pH value to be between 8.5 and 10.0, reacting for 10 to 60min while stirring, standing for 10 to 30min, and separating solid and liquid so as to obtain a phosphate reclaimed product and supernatant, wherein the supernatant can be discharged to a comprehensive wastewater treatment plant for biological treatment so as to realize standard emission. The method has the advantage of simple operation, and can realize the COD removal rate of the high-concentration phosphonomycin pharmaceutical wastewater to reach 40 to 95 percent, the organic phosphorus removal rate to reach over 99 percent, and the reclaiming rate of the phosphorus in the wastewater to reach over 99 percent.

Description

technical field [0001] The invention belongs to the technical field of industrial waste water treatment and recycling, in particular to a method for treating high-concentration fosfomycin pharmaceutical waste water and recovering phosphorus. Background technique [0002] Levofosfomycin is a broad-spectrum antibiotic discovered by Merck of the United States and CEPA of Spain in 1969 from Streptomyces. At present, the production of fosfomycin mainly utilizes chemical synthesis-chiral resolution technology. Fosfomycin pharmaceutical wastewater is the mother liquid wastewater produced during the production of fosfomycin by the chemical synthesis process. The main pollutants in the wastewater are organic phosphorus compounds containing C-P bonds (propynyl phosphate, cis-acryl phosphate, epoxy cis-acryl phosphate, etc. intermediate products and by-products of mycin synthesis), alcohols, anilines, EDTA and other raw materials and solvents. The composition of wastewater is complex ...

Claims

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Application Information

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IPC IPC(8): C02F9/04C01B25/32C01B25/45C02F1/72C02F1/74
Inventor 宋永会邱光磊曾萍钱锋
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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