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Method for removing phosphorus from high-concentration phosphorus-containing wastewater

A high-concentration, wastewater-based technology, applied in the field of pesticide production, can solve problems such as high operating costs, inability to remove organic phosphorus, and large investment in equipment, and achieve the effects of clear effluent, low process cost investment, and simple treatment process

Inactive Publication Date: 2016-11-09
SICHUAN FOURSTAR BIOTECH RANDD CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The phosphorus removal method in this invention is a catalytic oxidation method and a calcification phosphorus removal method. The catalytic oxidation method has a large investment in equipment and high operating costs, while the calcification phosphorus removal method can only remove inorganic phosphorus, but cannot remove organic phosphorus.

Method used

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  • Method for removing phosphorus from high-concentration phosphorus-containing wastewater

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Embodiment 1

[0027] This embodiment proposes a phosphorus removal method for high-concentration phosphorus-containing wastewater. The phosphorus removal method is to adjust the pH value of high-concentration phosphorus-containing wastewater with a total phosphorus concentration of 5000ppm, and send the wastewater obtained after calcification and phosphorus removal into the wastewater reaction. Pool, after the reaction is completed, add flocculant to form a solid-liquid mixture, and separate the solid-liquid mixture to obtain phosphopaste and clear liquid, which will be sent to the biochemical treatment process after treatment.

Embodiment 2

[0029] This embodiment proposes a phosphorus removal method for high-concentration phosphorus-containing wastewater. The phosphorus removal method is to add a pH regulator (hydrochloric acid) to the high-concentration phosphorus-containing wastewater with a total phosphorus concentration of 25000ppm, and mix the high-concentration phosphorus with a mixing reactor. The pH value of phosphorus-containing wastewater is adjusted to 2 to obtain acidified wastewater. The wastewater obtained after calcification and phosphorus removal of acidified wastewater is sent to the wastewater reaction tank. After the reaction is completed, a flocculant is added to form a solid-liquid mixture, and the solid-liquid mixture is separated from the solid-liquid Phosphopaste and clear liquid are obtained, and the clear liquid is sent to the biochemical treatment process after being processed.

Embodiment 3

[0031] This embodiment proposes a phosphorus removal method for high-concentration phosphorus-containing wastewater. The phosphorus removal method is to add a pH regulator (nitric acid) to the high-concentration phosphorus-containing wastewater with a total phosphorus concentration of 10,000ppm. The pH value of phosphorus-containing wastewater is adjusted to 0 to obtain acidified wastewater, and the wastewater obtained after calcification and phosphorus removal of the acidified wastewater is sent to the wastewater reaction tank. After the reaction is completed, a flocculant is added to form a solid-liquid mixture, and the solid-liquid mixture is separated from the solid-liquid Phosphopaste and clear liquid are obtained, and the clear liquid is sent to the biochemical treatment process after being processed.

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Abstract

The invention discloses a method for removing phosphorus from high-concentration phosphorus-containing wastewater. The method includes regulating a pH (potential of hydrogen) value of the high-concentration phosphorus-containing wastewater with the total phosphorus concentration of 5000-25000 ppm, calcifying the high-concentration phosphorus-containing wastewater, removing the phosphorus from the high-concentration phosphorus-containing wastewater to obtain wastewater and then feeding the wastewater into a wastewater reaction tank; adding flocculating agents into the wastewater reaction tank after reaction is completely carried out and forming solid and liquid mixtures; separating solid from liquid in the solid and liquid mixtures to obtain phosphorus paste and clear liquid; treating the clear liquid and then feeding the clear liquid into biochemical treatment working procedures. The method has the advantages that the phosphorus can be continuously removed at steps of pH regulating, calcification and phosphorus removal, treatment by the aid of the wastewater reaction tank and the like, accordingly, the treated high-concentration phosphorus-containing wastewater with the total phosphorus concentration of 5000-25000 ppm can reach wastewater standards under biochemical treatment conditions, filter residues and the phosphorus paste which are obtained in phosphorus removal procedures can be used as raw materials for producing phosphorus fertilizers, technological procedures are simple, the method is low in investment cost and little in environmental pollution, and the like.

Description

technical field [0001] The invention relates to a phosphorus removal method for high-concentration phosphorus-containing wastewater, in particular to a chemical phosphorus removal method for high-concentration phosphorus-containing wastewater generated in the pesticide production process, and belongs to the technical field of pesticide production. Background technique [0002] Phosphorus is widely used in chemical production, especially in the production of pesticides. The wastewater generated by the process often contains high concentrations of phosphorus, which has an impact on the environment. The country has formulated very strict discharge standards. [0003] In chemical production wastewater, phosphorus mainly exists in the form of inorganic phosphorus represented by phosphate and various forms of organic phosphorus. At present, the main method for removing phosphorus is ferrous sulfate phosphorus removal method. This method has a good effect in removing inorganic phosp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04B01D53/14F23G7/06C02F9/14C02F1/66C02F1/52
CPCC02F9/00C02F1/00C02F1/52C02F1/66C02F2001/007
Inventor 张华杨国华唐建军杨吉景凡李权石好
Owner SICHUAN FOURSTAR BIOTECH RANDD CORP
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