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Water treatment flocculating agent

A flocculant and water treatment technology, applied in the field of water treatment additives, can solve problems such as difficult to meet environmental governance requirements, complex components of printing and dyeing wastewater, and many refractory substances, so as to achieve low cost of flocculation treatment, improve water treatment effect, and increase deposition effect of ability

Inactive Publication Date: 2013-08-07
CHUZHOU YOULIN TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Printing and dyeing wastewater has complex components, large chroma, high concentration, many refractory substances, high COD value, and variable water quality. The main difficulty in treating this type of wastewater is decolorization. Currently, the commonly used agents for printing and dyeing wastewater by flocculation are inorganic aluminum salts, Iron salts are mainly used, but these materials have poor decolorization effects on reactive dyes, acid dyes, etc., and it is difficult to meet the actual environmental governance requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The flocculant composition of the present embodiment is 15 parts by weight of aluminum-containing compound, 15 parts by weight of ferric citrate, 5 parts by weight of polyferric sulfate, 3 parts by weight of sodium ferrate; 5 parts by weight of polyaluminum chloride, 10 parts by weight Nonionic polyacrylamide in parts by weight, ethylenediamine in 5 parts by weight and porous perlite micropowder in 3 parts by weight.

[0015] After draining 200mL of soil sludge, set up experimental group 1 and experimental group 2: experimental group 1 added 200 mg of the flocculant of this example, experimental group 2 added 200 mg of commercially available flocculant, stirred and mixed separately, settled until clarified, and then tested .

[0016] Among them, the PH value of the treated water in experimental group 1 was 7.3, the decolorization rate was 97.4%, the COD removal rate was 85.9%, the BOD removal rate was 74.2%, the total phosphorus removal rate was 93.7%, the total ammonia...

Embodiment 2

[0019] The flocculant is composed of 30 parts by weight of aluminum-containing compound, 20 parts by weight of ferric citrate, 8 parts by weight of polyferric sulfate, 5 parts by weight of sodium ferrate; 10 parts by weight of polyaluminum chloride, 15 parts by weight of non Ionic polyacrylamide, 10 parts by weight of ethylenediamine and 5 parts by weight of porous perlite powder.

[0020] Experimental group 3 took 200mL of soil sludge and drained it, added 200mg of the flocculant of this example, stirred and mixed, settled until clarified, and then tested. Among them, the pH value of the treated water in experimental group 3 was 7.1, the decolorization rate was 98.7%, and the COD The removal rate is 88.3%, the removal rate of BOD is 75.6%, the removal rate of total phosphorus is 94.6%, the removal rate of total ammonia is 46.3%, the residual rate of 20 micron solids is 12.3%, and the residual rate of flocculant is 18.2%.

Embodiment 3

[0022] The flocculant is composed of 20 parts by weight of aluminum-containing compounds, 17 parts by weight of ferric citrate, 6 parts by weight of polyferric sulfate, 3.5 parts by weight of sodium ferrate; 7 parts by weight of polyaluminum chloride, 12 parts by weight of non Ionic polyacrylamide, 7 parts by weight of ethylenediamine, 2 parts by weight of 200-mesh porous perlite fine powder and 1.2 parts by weight of fly ash fine powder.

[0023] Experimental group 4 took 200mL of soil sludge and drained it, added 200mg of the flocculant of this example, stirred and mixed, settled to clarification, and then tested. Among them, the pH value of the treated water in experimental group 4 was 7.2, the decolorization rate was 98.1%, and the COD The removal rate is 86.6%, the removal rate of BOD is 75.1%, the removal rate of total phosphorus is 94.2%, the removal rate of total ammonia is 45.8%, the residual rate of 20 micron solids is 15.8%, and the residual rate of flocculant is 14....

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Abstract

The invention discloses a water treatment flocculating agent. The water treatment flocculating agent consists of the following components: 15 to 30 weight parts of aluminum-containing compound, 15 to 20 weight parts of ferric citrate, 5 to 8 weight parts of polymeric ferric sulfate, 3 to 5 weight parts of sodium ferrate, 5 to 10 weight parts of polymeric aluminum chloride. 10 to 15 weight parts of non-ionic polyacrylamide, 5 to 10 weight parts of polyamine compounds and 3 to 5 weight parts of the mixer of porous perlite micro-powder and coal ash micro-powder. According to the water treatment flocculating agent, the molecular weight of the flocculating agent is increased by introducing the polyamine compounds, so that the water treatment flocculating agent is high in viscosity and high in stability, facilitates industrial production,and has the characteristics of quick sedimentation, good decoloring effect and the like.

Description

[0001] technical field [0002] The invention discloses a water treatment additive, in particular a water treatment flocculant. Background technique [0003] The flocculant is mainly a group with positive (negative) charge and some particles or particles with negative (positive) charge in some water that are difficult to separate, reduce its potential, make it in an unstable state, and use its The aggregated nature allows these particles to be concentrated and separated by physical or chemical means. The agents generally used for this purpose are called flocculants. Flocculants are mainly used in the fields of water supply and sewage treatment. Coagulation and sedimentation of chemical agents is a commonly used method in water treatment technology. The method has the characteristics of low investment, small land occupation, low operating cost and wide adaptability. In water treatment coagulation and sedimentation, the timing of flocculant feeding, feeding environment...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/54C02F1/56C02F1/52
Inventor 何晓春刘健杨华
Owner CHUZHOU YOULIN TECH DEV
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