Method for treating algae-containing sludge water by using oxidation flocculation precipitation combined process

A technology of combined process and treatment method, which is applied in the field of treatment of algae-containing muddy water by the combination process of oxidation flocculation and sedimentation, can solve the problems of high input cost, achieve the effects of increasing solid content, simple treatment method, and improved efficiency

Pending Publication Date: 2021-06-15
中国石化集团胜利石油管理局有限公司 +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The chemical oxidation precipitation treatment method has many applications in the advanced treatment of industrial sewage and urban sewage. It has strong pertinence and good treatment effect on the organic matter and COD in the sewage, but the input cost is high, and the chemical oxidation precipitation process is used for drainage. In muddy water treatment, unpredictable effects will be produced on water turbidity, algae, chroma, etc., and there is a greater risk of drinking

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  • Method for treating algae-containing sludge water by using oxidation flocculation precipitation combined process

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Effect test

Embodiment 1

[0030] Water body: algae-containing muddy water from water supply plant, pH=7.4, COD Mn It is 40mg / L, and the turbidity is 96NTU;

[0031] Oxidant: sodium hypochlorite; flocculant: PFS and PAM with a mass ratio of 25:1.5;

[0032] The algae-containing sludge discharge water from the water supply plant is treated with the oxidation flocculation-sedimentation combined reactor 1, and the treatment method is as follows:

[0033] S1: Put the algae-containing sludge discharge water (water body) in the oxidation pool 2, add sodium hypochlorite to the oxidation pool 2 according to the dosage of 0.3ml / L, the effective content of sodium hypochlorite is 5%, and the sodium hypochlorite is added from the oxidant dosing tube 7 Add; open the stirrer 9, the stirring speed is 350r / min, and the stirring time is 10min;

[0034] S2: The oxidized effluent flows into the mixing tank 3 by itself, and the flocculant is added to the mixing tank 3 according to the ratio of the weight volume ratio of ...

Embodiment 2

[0039] Water body: algae-containing muddy water from water supply plant, pH=7.4, COD Mn It is 36mg / L, and the turbidity is 108NTU;

[0040] Oxidant: Chlorine; Flocculant: PAC;

[0041] The algae-containing sludge discharge water from the water supply plant is treated with the oxidation flocculation-sedimentation combined reactor 1, and the treatment method is as follows:

[0042] S1: Put the algae-containing sludge discharge water (water body) in the oxidation tank 2, add chlorine gas to the sludge discharge water to be treated according to the dosing amount of 3mg / L, turn on the agitator 9, control the stirring speed to 350r / min, and contact the oxidation time 10min;

[0043] S2: The oxidized water flows into the mixing tank 3 by itself, and the flocculant is added to the mixing tank 3 according to the ratio of the weight volume ratio of the flocculant to the oxidized water of 6mg:1000ml, and the flocculant enters the mixing tank 3 from the flocculant dosing pipe 8 ; Turn ...

Embodiment 3

[0048] Water body: algae-containing muddy water from water supply plant, pH=7.4, COD MnIt is 36mg / L, and the turbidity is 108NTU;

[0049] Oxidant: Ozone; Flocculant: PAC;

[0050] The algae-containing sludge discharge water from the water supply plant is treated with the oxidation flocculation-sedimentation combined reactor 1, and the treatment method is as follows:

[0051] S1: Put the algae-containing sludge discharge water (water body) in the oxidation tank 2, add the ozone dosage of 3mg / L into the sludge discharge water to be treated, turn on the agitator 9, control the stirring speed to 350r / min, and contact oxidation The time is 10 minutes;

[0052] S2: The oxidized water flows into the mixing tank 3 by itself, and the flocculant is added to the mixing tank 3 according to the ratio of the weight volume ratio of the flocculant to the oxidized water of 6mg:1000ml, and the flocculant enters the mixing tank 3 from the flocculant dosing pipe 8 ; Turn on the stirrer 9, con...

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Abstract

The invention provides a method for treating algae-containing sludge water by using an oxidation flocculation precipitation combined process, which comprises the following steps: S1, adding an oxidant into the algae-containing sludge water, and conducting stirring, mixing and oxidizing to obtain oxidized effluent; and S2, adding a flocculating agent into the oxidized effluent, and conducting mixing, flocculating and precipitating to obtain supernate. The oxidant is one or a combination of chlorine, ozone, sodium hypochlorite and potassium permanganate; and the flocculating agent is one or a combination of more of PAC, PFS and PAM. The treatment method can remove protection of organic matter, algae and the like on colloidal particles in the sludge water, strengthen colloid destabilization, improve the sedimentation performance of the sludge water, form dense flocs, and reduce the turbidity of effluent, the concentration of the organic matter and pathogenic microorganisms, and meanwhile, the sludge water treated by the method greatly reduces the algae content, does not cause algae cell lysis and chlorophyll diffusion, and reduces the chromaticity.

Description

technical field [0001] The invention relates to the technical field of sludge water treatment, in particular to a treatment method for algae-containing sludge water by an oxidation flocculation-sedimentation combined process. Background technique [0002] In the water production process of the water purification plant, the raw water needs to be treated, and the wastewater generated at different stages of the treatment process is collectively called muddy water. Generally speaking, sludge discharge water will contain algae, organic matter, heavy metals and other substances, and direct discharge into natural water bodies will cause water pollution. In order to solve this problem, flocculants are often used to treat the sludge discharge water. However, because the algae contained in the sludge can be wrapped on the surface of the sludge discharge hydrocolloid particles, the sedimentation efficiency is reduced when the coagulation treatment is performed alone, and at the same ti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F101/30
CPCC02F9/00C02F1/722C02F1/78C02F1/76C02F1/56C02F1/5236C02F1/50C02F2209/11C02F2209/08C02F2209/10C02F2101/30C02F2303/04
Inventor 孙文祥刘伟刚张玉生柴德彬姚俊尹刚于方田刘欣顾学林彭正方张永杨涛
Owner 中国石化集团胜利石油管理局有限公司
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