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Treatment method and apparatus for purifying water with sewage sludge adsorption

A sewage treatment method and sludge adsorption technology, applied in the direction of adsorption water/sewage treatment, water/sludge/sewage treatment, biological water/sewage treatment, etc., can solve the problems of aeration treatment, increase the load of the primary sedimentation tank, etc. , to avoid odor emission, increase sludge activity, and reduce the concentration of organic matter

Inactive Publication Date: 2009-02-18
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the disadvantage is that it increases the load of the primary sedimentation tank, increases the BOD value of the sewage entering the aeration tank, and has a negative impact on the subsequent aeration treatment.

Method used

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  • Treatment method and apparatus for purifying water with sewage sludge adsorption
  • Treatment method and apparatus for purifying water with sewage sludge adsorption
  • Treatment method and apparatus for purifying water with sewage sludge adsorption

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] process such as image 3 shown. The excess sludge discharged from the secondary sedimentation tank is introduced into the sludge modified aeration tank 12 through the sludge inlet 11a, and the air 13 is aerated through the air inlet 13a and the aerator 13b, and the dissolved oxygen concentration in the aeration is 0.5mg / L, the aeration time is maintained for 1h, and then the modified sludge 2 is sent to the position 2e of the primary sedimentation tank 3, which is about 1 / 2 the length of the inlet and outlet of the primary sedimentation tank 3, through the sludge outlet 2a Mixed with sewage in the pool, such as figure 2 As shown, within the hydraulic retention time of the primary sedimentation tank, it is fully mixed with the sewage after adsorption and then settles, and the mud and water are separated. The adsorption supernatant is used as the effluent of the primary sedimentation tank and enters the aeration tank for further aerobic treatment. After adsorption, the ...

Embodiment 2

[0025] The remaining sludge discharged from the secondary sedimentation tank is introduced into the sludge modified aeration tank for aeration regeneration treatment, the dissolved oxygen concentration in the aeration is 1.0mg / L, the aeration time is maintained at 0.5h, and then the sludge is returned to the 2g away from the water inlet of the primary sedimentation tank, which is about 1 / 3 of the length of the inlet and outlet of the tank, so that the sludge concentration in the tank is maintained at 400-600mg / L. During the hydraulic retention time of the primary sedimentation tank, it is fully mixed with sewage and then settled , mud and water are separated, and the adsorption supernatant is used as the effluent of the primary sedimentation tank and enters the aeration tank for further aerobic treatment. After adsorption, the precipitated sludge enters the sludge treatment system. Compared with the effluent without adding sludge and the natural sedimentation of the primary sed...

Embodiment 3

[0027] The process conditions are the same as in Example 1, except that the sludge modified aeration tank 12 is not set in the process engineering, that is, the sludge discharged from the secondary sedimentation tank 8 is directly sent to the primary sedimentation tank 3 for adsorption and precipitation. When the biological oxidation load is low and the volume of the secondary sedimentation tank is relatively small, the sludge discharge is timely, and the sludge discharge of the primary sedimentation tank is timely, sludge adsorption and purification can also be achieved without sludge modification and aeration.

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Abstract

The invention relates to a mud absorption purification water processing method and a device thereof. One part of the precipitated mud that is discharged from a secondary precipitation pond (8) is used as return-flow mud (10) to be returned to an aeration tank, and the other part of the mud (11) is sent into a mud modification aeration tank (12) so as to perform the mud modification aeration pre-treatment; the mud (2) after the aeration modification is conveyed to an inertial precipitation pond (3) to be mixed with the sewage, and the mud (14) after the absorption and precipitation is discharged into a mud processing system. The aeration processing time of the mud modification aeration tank is 15 to 120 minuets, and the dissolved oxygen of the mud is 0.5 to 1.5 mg / L. The invention has the advantages that the activity of the mud is improved and the absorption and precipitation property of the mud is improved through the appropriate aeration; after the mud flows back, the removal efficiency of the inertial precipitation pond is greatly improved, and the organic matter concentration of the discharged water of the inertial precipitation pond is reduced, thereby reducing the load of the following processing procedures, and reducing the processing cost.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, in particular to an activated sludge water treatment method and device. Background technique [0002] In the activated sludge process system, microorganisms are mainly used to decompose organic pollutants to purify sewage and produce a large amount of excess sludge; the concentration of pollutants in the influent determines the treatment load and also affects the amount of excess sludge produced. The processing load directly determines the size of the processing unit and the processing cost. For small sewage treatment plants, using "initial adsorption and removal", the excess sludge can be considered to flow back to the primary sedimentation tank, so that it can produce a certain degree of biological flocculation and improve the removal effect of the primary sedimentation tank. However, the disadvantage is that it increases the load of the primary sedimentation tank, increases the BOD v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C02F3/12
CPCY02W10/10
Inventor 张书廷张晗
Owner TIANJIN UNIV
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