Papermaking wastewater treatment agent and use method thereof

A technology of papermaking wastewater and treatment agent, which is applied in the field of water treatment, can solve the problems that the treatment effect needs to be improved, the discharge requirements cannot be met, and the cost of sewage treatment is high. Simple effects using craft

Inactive Publication Date: 2020-04-03
台山市翔隆纸业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because polyaluminum sulfide is only suitable for acid sizing, while polyaluminum chloride can be used for sizing in acidic and neutral environments, the corrosion of the system is significantly weakened, and the treatment of white water is easier; in addition, the amount of use is large and

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Add 100ml of papermaking wastewater to a 250ml beaker, add 0.2ml of flocculant A to the beaker and stir quickly for 1min, then add 0.3ml of flocculant B to the beaker and stir quickly, after small clusters appear, pour them into the beaker Add 1.5ml of coagulant C agent, stir slowly for 2 minutes, the micro-agglomerates flocculate into large flocs, sink to the bottom of the beaker, and the water quality is clearer after the flocs are separated. The raw water of papermaking wastewater has an average CODcr value of 1309.5 mg / L and a turbidity of 382 NTU. After adsorption and flocculation treatment, the CODcr removal rate reaches 69.56%, and the turbidity removal rate reaches 85.4%.

Embodiment 2

[0034] Add 100ml of papermaking wastewater into a 250ml beaker, add 0.3ml of flocculant A to the beaker and stir quickly for 1min, then add 0.3ml of flocculant B to the beaker and stir quickly, after small clusters appear, pour them into the beaker Add 1.5ml of coagulant C, stir slowly for 2 minutes, the micro-agglomerates flocculate into large flocs, sink to the bottom of the beaker, and the water quality is clearer after the flocs are separated. The CODcr removal rate reached 71.72%, and the turbidity removal rate reached 83.9%.

Embodiment 3

[0036] Add 100ml of papermaking wastewater into a 250ml beaker, add 0.4ml of flocculant A to the beaker and stir quickly for 1min, then add 0.3ml of flocculant B to the beaker and stir quickly, after small clusters appear, pour them into the beaker Add 1.5ml of coagulant C, stir slowly for 2 minutes, the micro-agglomerates flocculate into large flocs, sink to the bottom of the beaker, and the water quality is clearer after the flocs are separated. The CODcr removal rate reached 72.53%, and the turbidity removal rate reached 85.3%.

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PUM

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Abstract

The invention discloses a papermaking wastewater treatment agent, which is prepared from a flocculating agent A, a flocculating agent B and a flocculating agent C, wherein the flocculating agent A isa modified bentonite solution with a mass content of 0.5%, the flocculating agent B is a polyaluminium chloride aqueous solution with a mass content of 3%, and the flocculating agent C is cationic polyacrylamide aqueous solution with a mass fraction of 0.1%, wherein the molecular weight of the cationic polyacrylamide is 8000000-12000000. The invention also discloses a use method of the papermakingwastewater treatment agent, wherein the use method comprises the following steps: adjusting the pH value of papermaking wastewater to 6-9, adding the flocculating agent A into the papermaking wastewater, quickly stirring, adding the flocculating agent B, slowly stirring until small micelle is generated, adding the flocculating agent C, slowly stirring to form large flocs, standing, separating theflocs in the circulating water, treating the papermaking wastewater, and feeding the treated papermaking wastewater into the next circulating treatment. The papermaking wastewater treatment agent islow in cost, simple in preparation and use process and good in treatment effect.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a papermaking wastewater treatment agent and a use method thereof. Background technique [0002] Papermaking wastewater refers to the wastewater generated during the pulping and papermaking process. Including pulping and cooking waste liquid, washing waste water, bleaching waste water and paper machine white water, etc. Papermaking wastewater contains a large amount of organic matter and suspended matter, as well as a large amount of chemicals and impurities. Papermaking wastewater has complex components and poor biochemical properties. It is a difficult industrial wastewater to treat and is one of the main industrial pollution sources in my country. [0003] Papermaking wastewater treatment processes include biochemical method, adsorption method, chemical oxidation method, ion exchange, point dialysis and flocculation precipitation method and so on. Among t...

Claims

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Application Information

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IPC IPC(8): C02F1/52C02F1/28C02F1/56C02F103/28
CPCC02F1/281C02F1/5236C02F1/5263C02F1/56C02F2103/28
Inventor 黄振江
Owner 台山市翔隆纸业有限公司
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