A method for multi-stage increase-decompression strengthening SBR excess sludge reduction and equipment for sludge reduction

A technology for sludge reduction and excess sludge, applied in chemical instruments and methods, fixed/solidified sludge treatment, water/sludge/sewage treatment, etc., can solve the problems of low ozone solubility and low actual utilization rate, etc. To improve the treatment efficiency, improve the effect, and achieve the effect of removal

Active Publication Date: 2020-05-08
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the sludge reduction technology based on ozone lysis has a good sludge reduction effect, it also has the problem of low solubility of ozone in water and low actual utilization rate.

Method used

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  • A method for multi-stage increase-decompression strengthening SBR excess sludge reduction and equipment for sludge reduction
  • A method for multi-stage increase-decompression strengthening SBR excess sludge reduction and equipment for sludge reduction

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Effect test

Embodiment 1

[0051] The present invention is aimed at a small sewage treatment plant that adopts the SBR treatment process. The scale of the treatment plant is small, and treatment processes such as sludge digestion cannot be used, and the sludge reduction treatment process based on ozonation is adopted. The excess sludge discharged from the SBR sedimentation process first enters the buffer / crushing reactor. An internal circulation pump is installed in the reactor, and the high-speed rotation of the pump impeller is used to break the sludge flocs. The crushed sludge mixture enters the first reactor in sequence. The first, second, and third stages of increased-pressure reduction enhanced sludge reduction reactors. The pressurized reaction column is composed of a closed cylindrical reactor, a supporting booster pump, an ejector and supporting pipelines. The ratio of height to diameter is 1:0.6, the inlet of the mixed solution is at the bottom of the reactor, a pressure reducing valve is set ...

Embodiment 2

[0055] The present invention is aimed at a small sewage treatment plant that adopts the SBR treatment process. The scale of the treatment plant is small, and treatment processes such as sludge digestion cannot be used, and the sludge reduction treatment process based on ozonation is adopted. The excess sludge discharged from the SBR sedimentation process first enters the buffer / crushing reactor. An internal circulation pump is installed in the reactor, and the high-speed rotation of the pump impeller is used to break the sludge flocs. The crushed sludge mixture enters the first reactor in sequence. The first, second, and third stages of increased-pressure reduction enhanced sludge reduction reactors. The pressurized reaction column is composed of a closed cylindrical reactor, a supporting booster pump, an ejector and supporting pipelines. The ratio of height to diameter is 1:1, the inlet of the mixed solution is at the bottom of the reactor, a pressure reducing valve is instal...

Embodiment 3

[0059] The invention is aimed at a medium-sized sewage treatment plant, adopts the SBR treatment process, and adopts the ozonated sludge reduction treatment process. The excess sludge discharged from the SBR sedimentation process first enters the buffer / crushing reactor. An internal circulation pump is installed in the reactor, and the high-speed rotation of the pump impeller is used to break the sludge flocs. The crushed sludge mixture enters the first reactor in sequence. The first, second, and third stages of increased-pressure reduction enhanced sludge reduction reactors. The pressurized reaction column is composed of a closed cylindrical reactor, a supporting booster pump, an ejector and supporting pipelines. The ratio of height to diameter is 1:0.8, the inlet of the mixed solution is at the bottom of the reactor, a pressure reducing valve is installed on the upper part of the reactor, and a stainless steel screen loaded with MnO is installed inside the reactor, the scree...

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Abstract

The invention provides a pressurization-decompression enhanced SBR (sequencing batch reactor activated sludge) residual sludge reduction method, and belongs to the technical field of sewage treatment.The method comprises the following steps: 1) SBR residual sludge is subjected to sludge floc breakage, and a broken sludge mixed solution is obtained; 2) the broken sludge mixed solution is subjectedto multi-stage pressurization-decompression enhanced sludge reduction, and a reduced mixed solution is obtained; 3) the reduced mixed solution is subjected to phosphorus recovery, solid-liquid separation is performed after phosphorus is recovered, and a supernatant obtained after separation is returned to SBR to complete sludge reduction, wherein ozone is added to the broken sludge mixed solutionin the multi-stage pressurization-decompression enhanced sludge reduction process, the dosage of ozone is 0.01-0.1 gO3 / gTSS. With adoption of the method, the sludge reduction effect can be improved,total phosphorus and total nitrogen are removed, and the sewage treatment efficiency in the reduction process is improved.

Description

technical field [0001] The invention belongs to the technical field of excess sludge treatment, and in particular relates to a method for reducing excess sludge by multi-stage increasing-pressure reducing strengthening SBR and equipment for reducing the amount of sludge. Background technique [0002] SBR (Sequencing Batch Reactor Activated Sludge) is the abbreviation of sequencing batch activated sludge process, which is an activated sludge water treatment technology operated by intermittent aeration. As an intermittently operated wastewater treatment process, its main process operation process includes: water inflow, aeration reaction, sedimentation, and water outflow. Its structure is simple, and its operation mode is flexible and changeable. Secondary sedimentation and other functions in one pool, no need to set up a sludge return system, has been widely used at home and abroad in recent years. The traditional SBR reactor design only includes aeration and aerobic process...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30C02F11/00
CPCC02F3/30C02F11/008
Inventor 任宏洋王兵彭磊刘璞真谭笑张宁康
Owner SOUTHWEST PETROLEUM UNIV
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