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Modified composite flocculant for improving settling property of paper-making wastewater

A composite flocculant and settling performance technology, applied in water/sewage treatment, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of high cost, secondary pollution, poor flocculation effect, etc. Achieve the effect of promoting sedimentation, compaction of sedimentation, and optimization of electronic structure

Inactive Publication Date: 2016-07-27
ANHUI GUONENG YISHENG ENVIRONMENTAL PROTECTION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing paper-making flocculants still have poor flocculation effect, high cost, and technical deficiencies that will cause secondary pollution after use

Method used

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  • Modified composite flocculant for improving settling property of paper-making wastewater

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Effect test

Embodiment 1

[0025] A modified composite flocculant for improving the settling performance of papermaking wastewater, consisting of the following mass fractions of raw materials:

[0026] Polyaluminum sulfate: 46wt%;

[0027] Bacillus subtilis liquid: 12wt%;

[0028] Bacteroides succinate producing liquid: 12wt%;

[0029] Alkyl polyglycosides: 2.5wt%;

[0030] Anionic polyacrylamide: 0.5wt%;

[0031] Bottom mud: 23wt%;

[0032] EDTA: 4 wt%.

Embodiment 2

[0034] A modified composite flocculant for improving the settling performance of papermaking wastewater, consisting of the following mass fractions of raw materials:

[0035] Alum: 30wt%;

[0036] Rhodococcus bacterium liquid: 12wt%;

[0037] White rot fungus liquid: 13wt%;

[0038] Alkyl polyglycosides: 4%;

[0039] Anionic polyacrylamide: 1wt%;

[0040] Activated silica: 35wt%;

[0041] EDTA: 5 wt%.

Embodiment 3

[0043] A modified composite flocculant for improving the settling performance of papermaking wastewater, consisting of the following mass fractions of raw materials:

[0044] Polyaluminum sulfate: 52wt%;

[0045] Bacillus subtilis liquid: 9wt%;

[0046] Rhodococcus erythropolis liquid: 5wt%;

[0047] Bacteroides succinate producing liquid: 4wt%;

[0048] Alkyl polyglycosides: 0.9wt%;

[0049] Anionic polyacrylamide: 4.1wt%;

[0050] Bottom mud: 20wt%;

[0051] EDTA: 5 wt%.

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Abstract

The invention relates to the technical field of sewage treatment, in particular to a modified composite flocculant for improving the settling property of paper-making wastewater.The modified composite flocculant comprises 30wt%-52wt% of inorganic flocculant, 18wt%-25wt% of biological flocculant, 1 wt%-5wt% of surfactant, 20wt%-35wt% of adsorbent and 3 wt%-5wt% of EDTA.According to the modified composite flocculant for improving the settling property of paper-making wastewater, settling velocity is high, sedimentation is more compact, and the sewage treatment effect is good.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a modified composite flocculant for improving the settling performance of papermaking wastewater. Background technique [0002] Papermaking wastewater mainly comes from the two production processes of pulping and papermaking in the papermaking industry. Pulping is to separate the fibers in the plant raw materials, make pulp, and then bleach it. This process will generate a lot of papermaking wastewater; papermaking is to dilute, shape, squeeze, and dry the pulp to make paper. The process is also prone to papermaking wastewater. The papermaking wastewater produced by pulping is the most serious. The wastewater discharged during pulp washing is dark brown, called black water. The content of pollutants in black water is extremely high, with BOD as high as 5-40g / L, and contains a lot of fibers, inorganic salts and pigments. The papermaking wastewater discharged from the bl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34
CPCC02F3/341C02F1/281C02F1/5245C02F1/547
Inventor 钟华
Owner ANHUI GUONENG YISHENG ENVIRONMENTAL PROTECTION SCI & TECH
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