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Alternate Starvation Microaerobic Anaerobic Coupled Filler Sludge Side Flow In-Situ Reduction Intensification Process

A sludge reduction and micro-aerobic technology, which is applied in the direction of aerobic and anaerobic process treatment, sludge treatment, biological sludge treatment, etc., can solve the limitation, sludge attenuation cracking/hydrolysis rate is low, uncoupling metabolism Inefficiency and other issues, to achieve low cost, reduce disposal costs, and enhance the effect of stirring

Active Publication Date: 2021-05-28
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the problem that the HRT of the anaerobic side flow tank of the traditional anaerobic SSR process is too long, the sludge attenuation cracking / hydrolysis rate is low, and the efficiency of uncoupling metabolism is low, which limits practical application, the present invention provides an alternate starvation microaerobic anaerobic Oxygen-Coupled Filler Sludge Side Flow In-Situ Reduction Intensification Process

Method used

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  • Alternate Starvation Microaerobic Anaerobic Coupled Filler Sludge Side Flow In-Situ Reduction Intensification Process
  • Alternate Starvation Microaerobic Anaerobic Coupled Filler Sludge Side Flow In-Situ Reduction Intensification Process
  • Alternate Starvation Microaerobic Anaerobic Coupled Filler Sludge Side Flow In-Situ Reduction Intensification Process

Examples

Experimental program
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Effect test

Embodiment 1

[0059] Such as figure 1 As shown, the water to be treated enters the mainstream biological treatment system from the inlet pump, and then enters anoxic tank 1, aeration tank 2 and sedimentation tank 3 in sequence. The stirring speed of anoxic tank 1 is 80rpm / min; anoxic tank 1 and aeration tank The HRT of 2 is 2.5 and 8h respectively, the bottom of the aeration tank 2 is aerated by the aeration pump, the dissolved oxygen is controlled at 3.8-4.0mg / L, the sludge concentration of the aeration tank 2 is 3.0g / L, and the sludge is mixed The ratio of liquid returning from the aeration tank 2 to the anoxic tank 1 is 150%; the sludge enters the sedimentation tank 3 for mud-water separation, and the sludge deposited at the bottom flows back to the hungry micro-aerobic filling tank 4 of the side stream sludge reduction system. The reflux ratio is 80%, the dissolved oxygen in the hungry micro-aerobic packing tank 4 is 0.8-1.5mg / L, and the sludge enters the anaerobic packing pool 5 subseq...

Embodiment 2

[0062] Such as figure 1 As shown, the water to be treated enters the mainstream biological treatment system from the inlet pump, and then enters anoxic tank 1, aeration tank 2 and sedimentation tank 3 in turn. The stirring speed of anoxic tank 1 is 70rpm / min; anoxic tank 1 and aeration tank The HRT of 2 is 2.3 and 8.3h respectively. The bottom of the aeration tank 2 is aerated by the aeration pump, and the dissolved oxygen is controlled at 2.5-4.5mg / L. The sludge concentration of the aeration tank 2 is 3.2g / L. The proportion of the mixed liquid flowing back from the aeration tank 2 to the anoxic tank 1 is 200%; the sludge enters the sedimentation tank 3 for mud-water separation, and the sludge settled at the bottom returns to the hungry micro-aerobic filling tank 4 of the side stream sludge reduction system , the reflux ratio is 100%, the dissolved oxygen in the hungry micro-aerobic packing tank 4 is 1.0-1.5mg / L, and the sludge then enters the anaerobic packing pool 5, and its...

Embodiment 3

[0065] Such as figure 1As shown, the water to be treated enters the mainstream biological treatment system from the inlet pump, and then enters anoxic tank 1, aeration tank 2 and sedimentation tank 3 in turn. The stirring speed of anoxic tank 1 is 80rpm / min; anoxic tank 1 and aeration tank The HRT of 2 is 2.3 and 8.3h respectively, the bottom of the aeration tank 2 is aerated by the aeration pump, the dissolved oxygen is controlled at 2.0-4.5mg / L, the sludge concentration of the aeration tank 2 is 3.0g / L, and the sludge The proportion of the mixed liquid flowing back from the aeration tank 2 to the anoxic tank 1 is 300%; the sludge enters the sedimentation tank 3 for mud-water separation, and the sludge settled at the bottom returns to the hungry micro-aerobic filling tank 4 of the side stream sludge reduction system , the reflux ratio is 80%, the dissolved oxygen in the hungry micro-aerobic packing tank 4 is 1.0-1.5mg / L, and the sludge then enters the anaerobic packing pool 5...

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Abstract

The invention discloses an in-situ reduction and intensification process for side flow sludge with alternating starvation microaerobic anaerobic coupling filler, which mainly includes a mainstream biological treatment system and a side flow sludge reduction system. The mainstream biological treatment system includes anoxic tanks, exposure Aeration tank and sedimentation tank, the bottom of the aeration tank pumps the digestate back to the anoxic tank through the pipeline, and the bottom of the sedimentation tank is pumped into the side stream sludge reduction component through the pipeline; the side stream reduction system includes starvation micro-aerobic filling tank and anaerobic Filling tanks, anoxic tanks, starved microoxic filling tanks, and anaerobic filling tanks are all equipped with rotating units, and the outlet of the side flow reduction system returns to the anoxic tank connected to the front end of the mainstream biological system. The invention alternates the microaerobic and anaerobic conditions through the side flow reduction system to increase the sludge attenuation rate and the substrate release hydrolysis rate; secondly, the filled suspended filler promotes the enrichment of the reduction functional bacteria and strengthens the uncoupling metabolism, thereby enhancing It improves the reduction efficiency and realizes high-efficiency reduction, which is conducive to the promotion of its practical engineering application.

Description

technical field [0001] The invention relates to the technical field of environmental protection and rational utilization of water resources, and is suitable for in-situ reduction of sludge in sewage treatment plants, in particular to an in-situ reduction and intensification process of alternating starvation microaerobic anaerobic coupling filler sludge side flow. Background technique [0002] With the continuous development of social economy and the acceleration of urbanization, the discharge and treatment of urban sewage and industrial wastewater are increasing, the discharge standards are becoming stricter, and the sludge production of corresponding sewage treatment plants is also rising sharply. At present, my country's annual dry sludge production is about 9.34 million tons, and it is also increasing at a rate of 10% year by year. [0003] Excess sludge has high moisture content, large volume, and contains a large amount of harmful chemicals, parasites, and heavy metals....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30C02F11/121C02F11/02C02F11/04
CPCC02F3/30C02F11/02C02F11/04C02F11/121C02F2303/06
Inventor 任洪强程成耿金菊
Owner NANJING UNIV