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Purification treatment method for industrial sewage

A purification treatment and industrial sewage technology, applied in water/sewage treatment, process wastewater treatment, biological water/sewage treatment, etc., can solve the problems of ecological system hazards, difficult treatment, high COD, etc., to reduce environmental hazards, Effects of reducing usage and reducing emissions

Inactive Publication Date: 2019-09-13
冯露晨
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Papermaking wastewater has complex components and poor biochemical properties. It is a difficult industrial wastewater to treat. Papermaking wastewater contains a lot of suspended matter, which are mainly paper residues that have not been fully utilized in the papermaking process; papermaking wastewater also contains hemicellulose, sugar The molecular weight of these substances is relatively small, and they are relatively easy to decompose; the papermaking wastewater also contains lignin, cellulose, etc., and these substances have relatively large molecular weights, and the decomposition time is relatively long, making it difficult to decompose
Because papermaking wastewater contains a lot of substances, it takes a long time for papermaking wastewater to decompose naturally, and the required COD and BOD are large, and the biochemical properties are poor. Improper treatment will cause great harm to the ecosystem.

Method used

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  • Purification treatment method for industrial sewage
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  • Purification treatment method for industrial sewage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The papermaking sewage flows into the screen pipeline for 5-stage filtration. The meshes of the screens are 20 mesh, 40 mesh, 80 mesh, 120 mesh and 180 mesh respectively. The filter residue is blocked by the screen, and the filtrate flows into the aerobic microbial decomposition tank through the screen. , after a period of time, the spring of the screen is stretched and deformed, indicating that more paper residue has accumulated on the screen, and the resistance of the screen to filter becomes larger. At this time, the paper residue on the recovery screen can be removed, see figure 2 A three-dimensional view of a multi-stage sieve.

[0035] Papermaking wastewater flows into the aerobic microbial decomposition tank after being filtered by multi-stage screens. Weigh 1 part of Bacillus subtilis, 1 part of Bacillus licheniformis, 1 part of lactic acid bacteria, 1 part of acetic acid bacteria, 4 parts of brown sugar, and 60 parts of tap water. Mix and dissolve, place at a ...

Embodiment 2

[0039] The multi-stage screen in the multi-stage screen filter pipeline was taken out, and the paper slag in the papermaking wastewater was removed by using a common single-stage screen, the mesh number of which was 80 mesh, and other conditions were the same as in Example 1.

Embodiment 3

[0041] The operation steps are the same as in Example 1, except that the aquatic plant purification step is omitted, and after the hydrogen peroxide oxidation is completed and heated and decomposed, samples are taken directly from the hydrogen peroxide oxidation tank.

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Abstract

The invention relates to a purification treatment method for industrial sewage. The purification treatment method comprises the following concrete steps: step 1, filtration via multi-stage screen pipelines; step 2, decomposition via aerobic microorganism; step 3, decomposition via hydrogen peroxide; and step 4, purification via aquatic plants. The purification treatment method of the invention integrates physical, biological and chemical processes, effectively recovers fibers in papermaking sewage, fully decomposes various organic substances in the papermaking sewage and reduces the COD and BOD of a water body; and regenerated water can be used for secondary papermaking.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a method for purifying and treating industrial sewage. Background technique [0002] Papermaking wastewater has complex components and poor biochemical properties. It is a difficult industrial wastewater to treat. Papermaking wastewater contains a lot of suspended matter, which are mainly paper residues that have not been fully utilized in the papermaking process; papermaking wastewater also contains hemicellulose, sugar Lignin, methanol, acetic acid, etc. These substances have a small molecular weight and are relatively easy to decompose; papermaking wastewater also contains lignin, cellulose, etc. These substances have a large molecular weight, take a long time to decompose, and are relatively difficult to decompose. Because papermaking wastewater contains a lot of substances, it takes a long time for the natural decomposition of papermaking wastewater, and the required COD and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/28
CPCC02F1/001C02F1/722C02F1/725C02F3/02C02F3/32C02F9/00C02F2103/28C02F2209/08
Inventor 冯露晨陈海涛杨宁
Owner 冯露晨