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Dirt dispersion agent for processing wastewater with high phosphorus content and high calcium content by using activated sludge

A technology of scale inhibitor and dispersant and activated sludge, which is applied in the field of scale inhibitor and dispersant, can solve problems such as the influence of the normal operation of the biological treatment system, and achieve the effects of long duration of drug effect, good stability and good biological activity.

Active Publication Date: 2015-01-28
LANZHOU BLUESTAR CLEANING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some influence on the normal operation of the biological treatment system

Method used

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  • Dirt dispersion agent for processing wastewater with high phosphorus content and high calcium content by using activated sludge
  • Dirt dispersion agent for processing wastewater with high phosphorus content and high calcium content by using activated sludge
  • Dirt dispersion agent for processing wastewater with high phosphorus content and high calcium content by using activated sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Take 15 parts by weight of acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer, 15 parts by weight of 2-phosphonobutane-1,2,4-tricarboxylic acid, polyamino polyether group methylene phosphine 15 parts by weight of acid polycarboxylic acid are prepared by mixing and stirring.

Embodiment 2

[0019] Take 19 parts by weight of acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer, 12 parts by weight of 2-phosphonobutane-1,2,4-tricarboxylic acid, polyamino polyether group methylene phosphine 20 parts by weight of acid polycarboxylic acid are prepared by mixing and stirring.

Embodiment 3

[0021] Take 22 parts by weight of acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer, 10 parts by weight of 2-phosphonobutane-1,2,4-tricarboxylic acid, polyamino polyether group methylene phosphine 15 parts by weight of acid polycarboxylic acid are prepared by mixing and stirring.

[0022] In order to illustrate the scale inhibition and dispersion effect of the present invention on the treatment of high-phosphorus and high-calcium wastewater by activated sludge, the above-mentioned examples are used to further illustrate its performance below. The water quality of the following experiment is the influent water sample whose pH value was adjusted to be neutral by using alkali to adjust the pH value of the production wastewater in the CaHPO4 recovery process section of a gelatin company.

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Abstract

The invention relates to a dirt dispersion agent for processing wastewater with high phosphorus content and high calcium content by using activated sludge. The dirt dispersion agent is prepared from the following raw materials including acrylic acid-2-acrylamido-2-methylpropanesulfonic acid copolymer, 2-phosphonobutane-1,2,4-tricarboxylic acid and polyamino polyether methylene phosphonic acid. The dirt dispersion agent is used for processing the high phosphorus content and high calcium content wastewater by using the activated sludge, can effectively suppress deposition of partial calcium salt on the activated sludge surface and relieve compressibility of activated sludge volume index by the calcium salt, thereby releasing a flocculation volume of the activated sludge, enabling the activated sludge to keep relatively good bioactivity, reducing sludge-producing rate, obviously reducing content of inorganic ash in the sludge, reducing output of calcium sludge and increasing removal rate of COD.

Description

technical field [0001] The invention relates to the field of waste water treatment, in particular to a scale inhibitor and dispersant for activated sludge treatment of high phosphorus and high calcium waste water. Background technique [0002] High-phosphorus and high-calcium wastewater is waste water that is discharged after recycling calcium hydrogen phosphate after the pickling process and liming process in the gelatin production process. It mainly contains Cl - , Ca 2+ 、PO 4 3- Plasma and nucleic acid, amino acid, protein and other organic matter such as N and P, COD up to 3000mg·L -1 Above, Cl - The concentration is as high as 3% or more, with weak acid and high Ca 2+ , high Cl - , high protein characteristics, difficult management, high processing costs. The discharge of these wastewater into the environment causes eutrophication of the water quality, and sometimes even makes the water quality black and smelly, pollutes the environment, and brings serious harm t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/14
CPCC02F5/145C02F2303/22
Inventor 邓爱云刘镇平
Owner LANZHOU BLUESTAR CLEANING CO LTD
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