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Push flow composite biological mud volume reducing reactor and its operation method

A technology of biological sludge and operation method, applied in biological sludge treatment, chemical instruments and methods, biological water/sewage treatment, etc., can solve problems such as ineffective sludge reduction and unstable growth of metazoans, and achieve Easy to automate control, reduce sludge treatment and disposal costs, improve sludge settling and dewatering performance

Inactive Publication Date: 2005-08-24
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, protozoa and metazoans grow together with bacteria in the same bioreactor (aeration tank), and the operating conditions of the aeration tank are mainly conducive to the degradation of organic matter by microorganisms such as bacteria, which are not completely suitable for the growth of protozoa and metazoa. The growth of protozoa and metazoans is unstable, which leads to the insignificant effect of sludge reduction

Method used

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  • Push flow composite biological mud volume reducing reactor and its operation method
  • Push flow composite biological mud volume reducing reactor and its operation method
  • Push flow composite biological mud volume reducing reactor and its operation method

Examples

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Effect test

Embodiment 1

[0042] The push-flow composite biological sludge reduction reactor is divided into three parts by a partition. They are free type protozoa, metazoan growth area, attached type protozoa, metazoan growth area, and solid-liquid separation sedimentation area, which are used for sewage organisms. Reduce the amount of surplus sludge discharged from the treatment system.

[0043] Use a sludge transfer pump to transfer the remaining sludge discharged from the secondary settling tank or sludge thickening tank in the sewage treatment plant to the free-type protozoan and metazoan growth area of ​​the push-flow composite biological sludge reduction reactor, and then Enter the attached protozoan, metazoan growth area and solid-liquid separation sedimentation area in turn. During the entire operation, keep the water temperature in the push-flow composite biological sludge reduction reactor at 20°C and the pH at 6-9, and the activated sludge concentration in the free-form prot and metazoan growt...

Embodiment 2

[0047] The push-flow composite biological sludge reduction reactor is divided into three parts by a partition. They are attached protozoa, metazoan growth area, free protozoa, metazoan growth area, and solid-liquid separation sedimentation area, which are used to treat conventional The return sludge of the activated sludge method is integrated with the aeration tank and the secondary settling tank to reduce the amount of sludge produced.

[0048] Use a sludge transfer pump to transport the returned sludge mixture to the attached protozoan and metazoan growth area of ​​the push-flow composite biological sludge reduction reactor, and then enter the free protozoan, metazoan growth area and solid-liquid separation and sedimentation in turn Area. During the entire operation, keep the water temperature in the push-flow composite biological sludge reduction reactor at 20°C and the pH at 6-9, and the activated sludge concentration in the free-form prot and metazoan growth area is 3.0-6.0g...

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Abstract

The present invention discloses a mud treating apparatus by means of biotechnology. The composite push-flow biological mud-reducing reactor is divided with partitioning boards into three parts, including free protozoan and metazoan growing area, adherent protozoan and metazoan growing area and solid / liquid separating deposition area. The reactor provides protozoan and metazoan of different types with feasible habitat and thus effectively raised mud reducing effect. The reactor of the present invention may be used either alone for treating mud in biological sewage processing system or in treating reflux mud via combination with aeration pond and secondary precipitation pond to reduce mud.

Description

Technical field [0001] The invention belongs to the field of equipment for treating sludge by using biological technology, and particularly relates to a push-flow composite biological sludge reduction reactor and an operation method thereof. Background technique [0002] Activated sludge method is currently the most widely used biological treatment technology in urban sewage and industrial wastewater treatment plants in the world, but it produces a large amount of surplus sludge during operation. Generally, the treatment and disposal of surplus sludge accounts for about 40% of the operating cost of the entire sewage treatment plant. If the remaining sludge cannot be effectively treated and disposed of, it will directly affect the normal operation of the sewage treatment plant and cause secondary pollution. [0003] The general principles of sludge treatment and disposal are stabilization, harmlessness and resource utilization. At present, the main treatmen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/12C02F11/02
CPCY02W10/10Y02W10/20
Inventor 魏源送刘俊新
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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