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Combined flocculating agent with controllable flocculation and using method thereof

A flocculant and combined technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of large temperature influence, difficult disposal, secondary pollution, etc. Effect

Inactive Publication Date: 2010-05-05
武汉循环经济研究院 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Most of the existing flocculants are either expensive, toxic, slow flocculation, or uncontrollable flocculation, or are greatly affected by temperature, or produce a large amount of residual sludge and residue that is difficult to dispose of, easily causing secondary Pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Dissolve 2g of modified natural polymer and 10g of complexing agent in 1L of distilled water to form a solution. Take 1L of Changjiang River Water with a turbidity of 30NTU in a 1L beaker, add 10mL of the dissolved modified natural polymer solution, and stir rapidly for 3 minutes (300r / min), then add 10mL of the dissolved complexing agent, and stir at a medium speed for 20 Seconds (120r / min), a large number of floc particles are produced, and the turbidity of the supernatant is measured to be 0.5 after 5 minutes, and the turbidity removal rate is 98.3%.

Embodiment 2

[0028] Dissolve 2g of modified natural polymer and 10g of complexing agent in 1L of distilled water to form a solution. Take 1L of Changjiang River Water with a turbidity of 32NTU in a 1L beaker, add 5mL of the dissolved modified natural polymer solution, stir rapidly for 4 minutes (300r / min), then add 10mL of the dissolved complexing agent, and stir at a medium speed for 20 Seconds (120r / min), a large number of floc particles are produced, and the turbidity of the supernatant is measured to be 3.0 after 5 minutes, and the turbidity removal rate is 90.6%.

Embodiment 3

[0030] Dissolve 2g of modified natural polymer and 10g of complexing agent in 1L of distilled water to form a solution. Take 1L of kaolin suspension with a turbidity of 105NTU in a 1L beaker, add 8mL of the dissolved modified natural polymer solution, and stir mechanically for 2 minutes (300r / min), then add 12mL of the dissolved complexing agent, and stir at a medium speed After 20 seconds (120r / min), a large number of floc particles were produced, and after 5 minutes, the turbidity of the supernatant was measured to be 1.5, and the turbidity removal rate was 98.6%.

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Abstract

The invention relates to a modified natural polymer combined flocculating agent and a using method thereof. The flocculating agent is the combination of modified natural polymer and complexing agent, wherein the modified natural polymer is prepared by carrying out phosphorylation modification, sulfonation modification or etherification modification on one or combination of two in shells of shelled animals such as shrimps, crabs and insects, cotton, straw, bagasse and starch; the complexing agent is combination of at least two in magnesium chloride, calcium chloride, sodium hydroxide, potassium hydroxide, aluminium chloride, aluminum sulfate, aluminium potassium sulfate, calcium oxide, sodium tetraborate, ferric chloride, ferrous sulfate, ferrous chloride, ferric sulfate, boric acid, hydrochloric acid and sulfuric acid. After the modified natural polymer is added, the complexing agent can be added into the natural polymer at any time within 12h according to the need of flocculation, and the flocculation reaction can be immediately finished. The invention has the advantages of controllable flocculation, rapid flocculation speed, large and firm flocculating body, low water content, safety, non-toxicity and wide temperature adaptation range.

Description

technical field [0001] The invention relates to a flocculant used in a water treatment process and a use method thereof, in particular to a modified natural polymer combined type flocculant and a use method thereof. Background technique [0002] The flocculation process is one of the most widely used and most common unit operations in many water treatment processes at home and abroad, and is an indispensable key link in the wastewater treatment process. The quality of the flocculation effect often determines the operation status of the subsequent process, the final effluent water quality and cost, and the choice of flocculant has important technical and economic value for improving the effluent water quality and reducing the cost of water production. The main object of flocculation is the hydrophobic sol and suspended particles formed by insoluble substances in water. The flocculant is the core part of the flocculation process, and its performance directly affects the qualit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
Inventor 王洋李斌叶阳吴超陈卉
Owner 武汉循环经济研究院
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