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Method for removing phosphorus in phosphorus containing wastewater

A waste water, water-containing technology, applied in the field of environmental chemistry, can solve problems such as inability to treat

Inactive Publication Date: 2016-08-10
GUANGZHOU ENVIRONMENTAL PROTECTION TECH EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention proposes a phosphorus removal method for phosphorus-containing wastewater, which solves the technical problem that industrial phosphorus wastewater cannot be treated by existing physical or biological methods in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0034] First take 1L of phosphorus-containing wastewater, the phosphorus content is 20-30 mg / L, adjust the pH value to 6-9, add 130 mg of ferric chloride, stir rapidly for 2 minutes, and rotate at 100 rpm to form iron salt colloid. Then add 2 mg of polyaluminium chloride, stir for 5 minutes at a slow speed, and the stirring speed is 40 rpm to form a precipitate, remove the colloid, and achieve the purpose of removing phosphorus. The phosphorus content in the treated wastewater was measured to be 0.33 mg / L, and there was no other secondary pollution.

example 2

[0036] First take 1L of phosphorus-containing wastewater, the phosphorus content is 20-30 mg / L, adjust the pH value to 6-9, add 150mg of ferric chloride, stir rapidly for 2 minutes, and rotate at 160 rpm to form iron salt colloid , then add 4 mg of polyaluminum chloride, stir at a slow speed for 4 minutes, and rotate at a speed of 50 rpm to form a polymeric precipitate, remove the colloid, and achieve the purpose of removing phosphorus. The phosphorus content in the treated wastewater was measured to be 0.32 mg / L, and there was no other secondary pollution.

example 3

[0038] First take 1L of phosphorus-containing wastewater, the phosphorus content is 20-30 mg / L, adjust the pH value to 6-9, add 170mg of ferric chloride, stir rapidly for 1 minute, and rotate at 180 rpm to form iron salt colloid , then add 6 mg of polyaluminum chloride, stir at a slow speed for 4 minutes at a speed of 60 rpm to form a polymeric precipitate, remove the colloid, and achieve the purpose of removing phosphorus. The phosphorus content in the treated wastewater was measured to be 0.31 mg / L, and there was no other secondary pollution.

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Abstract

The invention provides a method for removing phosphorus in phosphorus containing wastewater .Firstly, the pH value of the phosphorus containing wastewater is regulated to be 6-9, at this time, phosphate mainly exists in the form of dihydrogen phosphate and hydrogen phosphate, and then ferric trichloride is added for hydrolysis to form a ferrous hydroxyl compound; hydrolysate and phosphate form colloids, then aluminum polychlorid is added, the colloids formed by phosphate and iron in the wastewater form sediment by means of adsorption, bridging, sweeping and other actions and are removed out of the wastewater, and the purpose of removing phosphorus is achieved .According to the technology, by analyzing the existing state of phosphate in the wastewater, adding different chemicals and controlling operation parameters, phosphate in the wastewater is made to generate the colloidal state substances, and then the colloids are removed out of the wastewater by means of flocculent settling, so that the phosphorus content in the wastewater is reduced to be below 0.5 mg / L and within the range of 0.3-0.4 mg / L generally.

Description

technical field [0001] The invention relates to a new technology for removing phosphorus from industrial wastewater with high phosphorus content, low organic matter content and poor wastewater biochemical properties, and belongs to the field of environmental chemistry. Background technique [0002] At present, there are biological methods, physical and chemical methods, etc. for the removal of phosphorus in industrial wastewater. [0003] The biological method mainly relies on the action of microorganisms to achieve the purpose of phosphorus removal through sludge removal. The biological method mainly relies on the life activities of microorganisms. The phosphorus is absorbed into the activated sludge through the adsorption of phosphorus accumulating bacteria, and the phosphorus in the wastewater is removed with the discharge of the sludge. It is required that the wastewater has a certain amount of organic matter content to maintain biological activity, and the organic matt...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F101/10C02F1/66C02F1/52
CPCC02F9/00C02F1/52C02F1/5245C02F1/66C02F2001/5218C02F2101/105C02F2305/12
Inventor 李善得高忠本陈迪唐忠辉莫建红盘兰开
Owner GUANGZHOU ENVIRONMENTAL PROTECTION TECH EQUIP
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