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Treatment process for papermaking industrial wastewater

A technology for paper industry wastewater and treatment process, which is applied in processing wastewater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. To deal with problems such as large scale, to achieve the effect of convenient operation, high operation stability and low operation cost

Inactive Publication Date: 2014-01-15
苏州腾辉环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to statistics, my country's pulp and paper industry wastewater discharge and COD discharge both occupy the first place in my country's various industrial discharges, and the pollution of the water environment is the most serious. The paper industry wastewater problem has become an urgent problem that needs to be solved. At present, Alkali recovery technology is mostly used in the market. In addition to reducing water pollution, this technology can also recover heat and chemical energy and improve resource utilization. However, this technology has a large scale of treatment, relatively high operating costs, and a small scope of application, which cannot meet the needs of flexibility. Changing market demands

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (a) Influent water: import industrial wastewater produced by papermaking, the quality of wastewater COD=2200mg / L, BOD=1380mg / L, SS=100mg / L;

[0020] (b) Grille: A mechanical grille is used to block large solid objects suspended or floating in the intercepted sewage, and the gap between the grid bars is 5mm;

[0021] (c) Water collection: the waste water passing through the grid is introduced into the water collection well for collection;

[0022] (d) Sedimentation: The water in the collection well is introduced into the sedimentation tank with steel-concrete structure, and the effective volume is 160m 3 , the settling time is 12h;

[0023] (e) Adjustment: The settled water is introduced into the adjustment pool of steel-concrete structure, with an effective volume of 120m 3 , the hydraulic retention time is 3h;

[0024] (f) Selection: the water regulated by the adjustment pool is introduced into the selection pool with an effective volume of 150 m 3 , the processing...

Embodiment 2

[0030] (a) Influent water: import industrial wastewater produced by papermaking, the quality of wastewater COD=2570mg / L, BOD=1587mg / L, SS=90mg / L;

[0031] (b) Grille: A mechanical grille is used to block large solid objects suspended or floating in the intercepted sewage, and the gap between the grid bars is 6mm;

[0032] (c) Water collection: the waste water passing through the grid is introduced into the water collection well for collection;

[0033] (d) Sedimentation: The water in the collection well is introduced into the sedimentation tank with steel-concrete structure, with an effective volume of 170 m 3 , the settling time is 13h;

[0034] (e) Adjustment: The settled water is introduced into the adjustment pool of steel-concrete structure, with an effective volume of 125m 3 , the hydraulic retention time is 4h;

[0035] (f) Selection: the water regulated by the adjustment pool is introduced into the selection pool, with an effective volume of 160m 3 , the processing...

Embodiment 3

[0041] (a) Influent water: imported industrial wastewater produced by papermaking, the quality of wastewater COD=2170mg / L, BOD=1490mg / L, SS=80mg / L;

[0042] (b) Grille: A mechanical grille is used to block large solids suspended or floating in the intercepted sewage, and the gap between the grids is 7mm;

[0043] (c) Water collection: the waste water passing through the grid is introduced into the water collection well for collection;

[0044] (d) Sedimentation: The water in the water collection well is introduced into the sedimentation tank of steel-concrete structure, with an effective volume of 180 m 3 , the settling time is 14h;

[0045] (e) Adjustment: The settled water is introduced into the adjustment tank of steel-concrete structure, with an effective volume of 130 m 3 , the hydraulic retention time is 5h;

[0046] (f) Selection: the water regulated by the adjustment pool is introduced into the selection pool, with an effective volume of 170 m 3 , the processing ti...

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PUM

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Abstract

The invention discloses a treatment process for papermaking industrial wastewater, comprising water inlet, grating, water collection, deposition, regulation, selection, aeration, secondary deposition, coagulation deposition and water outlet. The treatment process has advantage of simple technology, simple operation and high operation stability; discharged sludge can be reused by effective treatment, thereby reducing operation cost, being in favor of raising economic benefits; and an added coagulation deposition technology can further purify water quality of water outlet, reduces environment pollution, and is in favor of improvement of people life environment.

Description

technical field [0001] The invention relates to a wastewater purification process, in particular to a papermaking industrial wastewater treatment process. Background technique [0002] Paper is an indispensable item in people's daily office life. People consume a lot of paper, and the demand for answers has caused the rapid development of the paper industry, and at the same time, environmental pollution is inevitable. According to statistics, my country's pulp and paper industry wastewater discharge and COD discharge both occupy the first place in my country's various industrial discharges, and the pollution of the water environment is the most serious. The paper industry wastewater problem has become an urgent problem that needs to be solved. At present, Alkali recovery technology is mostly used in the market. In addition to reducing water pollution, this technology can also recover heat and chemical energy and improve resource utilization. However, this technology has a lar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/28
Inventor 徐浩
Owner 苏州腾辉环保科技有限公司