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Waste paper pulping and papermaking advanced waste water treatment technique

A pulp and papermaking and advanced treatment technology, which is applied in the direction of processing wastewater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., to achieve the effects of scientific and reasonable design, improved reaction degree, and strong impact resistance

Inactive Publication Date: 2010-07-28
SHANDONG ACAD OF ENVIRONMENTAL SCI
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Problems solved by technology

At present, the flocculation process that is widely used in the advanced treatment of pulping and papermaking wastewater can only reduce the COD of waste paper pulping and papermaking wastewater from about 100 mg / L to about 70 mg / L, and the Fenton oxidation process can only reduce the COD of waste paper pulping and papermaking wastewater. Reduced from about 100mg / L to about 60mg / L

Method used

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  • Waste paper pulping and papermaking advanced waste water treatment technique

Examples

Experimental program
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Effect test

Embodiment 1

[0021] As shown in Figure 1, waste paper pulping and papermaking wastewater is treated according to the following steps:

[0022] In the first step, the 1000m 3 of waste paper pulping and papermaking wastewater was collected in the sump 1, after testing, its COD cr The content is 137.6mg / L;

[0023] In the second step, the waste water is lifted to the magnetizer 2 for magnetization treatment by the lifting pump 8;

[0024] In the third step, the magnetized waste water is discharged into the primary dosing mixing reaction tank 3, and then the 0.3kg / m 3 According to the standard, add ferrous sulfate 9 to the reaction tank. After the ferrous sulfate 9 is fully mixed with the wastewater, add calcium hydroxide 10 to the reaction tank to adjust the pH of the wastewater to 8.5. 3 Add anionic polyacrylamide 11 to the reaction pool to promote floc aggregation;

[0025] In the fourth step, the wastewater treated in step 3 is discharged into the first-stage sedimentation tank 4 to re...

Embodiment 2

[0032] As shown in Figure 1, waste paper pulping and papermaking wastewater is treated according to the following steps:

[0033] In the first step, the 1500m 3 of waste paper pulping and papermaking wastewater was collected in the sump 1, after testing, its COD cr The content is 126.9mg / L;

[0034] In the second step, the waste water is lifted to the magnetizer 2 for magnetization treatment through the lifting pump;

[0035] In the third step, the magnetized waste water is discharged into the primary dosing mixing reaction tank 3, and then the 0.4kg / m 3 According to the standard, add ferrous sulfate 9 to the reaction tank, and after the ferrous sulfate 9 is fully mixed with the wastewater, add calcium hydroxide 10 to the reaction tank to adjust the pH of the wastewater to 9.0, stir and mix for 15 minutes, and then use 1g / m 3 Add anionic polyacrylamide 11 to the reaction pool to promote floc aggregation;

[0036] In the fourth step, the wastewater treated in step 3 is disc...

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Abstract

The invention discloses a waste paper pulping and papermaking advanced waste water treatment technique, comprising the following steps of: waste water collection, magnetization, first-stage dosing reaction, first-stage precipitation, second-stage dosing reaction, second-stage precipitation and temporary storage of clear water. The technique has the advantages that (1) the technique is based on physicochemical technology, and the design is scientific and reasonable, so that good effect of advanced waste water treatment can be ensured; (2) the technique not only removes organic pollutant and chroma in the waste water with high efficiency, but also greatly reduces the hardness of the waster water and lays foundation for recycling the waste water; and (3) the technique has wide technical applicability and strong shock resistance capability.

Description

technical field [0001] The invention relates to a waste paper pulping and papermaking wastewater advanced treatment process, in particular to a waste paper pulping and papermaking wastewater advanced treatment process designed for the water quality characteristics of the waste paper pulping and papermaking wastewater after secondary biochemical treatment. Background technique [0002] Wastewater from waste paper pulping and papermaking enterprises in China is mostly treated by secondary biochemical treatment process. The COD of biochemical treatment effluent is usually around 100mg / L, which can meet the current "Pulp and Paper Industry Water Pollutant Discharge Standard" (GB3544-2008 ) Standard COD is lower than the requirement of 120mg / L, so the current application technology for the advanced treatment technology of waste paper pulping and papermaking wastewater is less. The "Pulp and Paper Industry Water Pollutant Discharge Standard" (GB3544-2008) standard requires pulp an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/12C02F1/48C02F1/56C02F103/28
Inventor 刘勃郎咏梅洪卫季华东庄会栋苏颖李晓宁
Owner SHANDONG ACAD OF ENVIRONMENTAL SCI
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