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Method for cultivating high strength aerobic granular sludge

A technology of aerobic granular sludge and cultivation methods, applied in chemical instruments and methods, water/sludge/sewage treatment, aerobic and anaerobic process treatment, etc., can solve the problem of biomass loss, disintegration, and influence on process operation efficiency and other issues to achieve the effect of rapid cultivation

Inactive Publication Date: 2014-07-02
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the structural disintegration of granular sludge under long-term operating conditions, resulting in the loss of biomass, it will affect the operating efficiency of the process. Important prerequisites for engineering applications

Method used

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  • Method for cultivating high strength aerobic granular sludge
  • Method for cultivating high strength aerobic granular sludge
  • Method for cultivating high strength aerobic granular sludge

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Embodiment 1, the cultivation of aerobic granular sludge

[0025] The flocculent return sludge retrieved from a sewage treatment plant in Shanghai was settled at room temperature, the supernatant was removed, and the concentration of concentrated activated sludge was determined to be 19714 mg / L. At room temperature, 700 mL of sludge was inoculated into an SBR reactor with an effective volume of 2.3 L. Each operation cycle is divided into five stages: water intake-aeration-sedimentation-drainage-idle. During the water inflow period, start the inflow pump to inject synthetic sewage into the reactor. After reaching the effective volume of the reactor, stop the water inflow for 3 minutes; the aeration stage and the settlement stage are 227 minutes in total, and the aeration rate is 5 L / min. During the sludge cultivation period, the process was divided into six stages, and the sedimentation time of the sludge was adjusted according to different operation stages. The speci...

Embodiment 2

[0026] Embodiment 2, the cultivation of aerobic granular sludge

[0027] The flocculent return sludge retrieved from a sewage treatment plant in Shanghai was settled at room temperature, the supernatant was removed, and the concentration of concentrated activated sludge was determined to be 19714 mg / L. At room temperature, 700 mL of sludge was inoculated into an SBR reactor with an effective volume of 2.3 L. Each operation cycle is divided into five stages: water intake-aeration-sedimentation-drainage-idle. During the water inflow period, start the inflow pump to inject synthetic sewage into the reactor. After reaching the effective volume of the reactor, stop the water inflow for 3 minutes; the aeration stage and the settlement stage are 227 minutes in total, and the aeration rate is 3 L / min. During the sludge cultivation period, the process was divided into six stages, and the sedimentation time of the sludge was adjusted according to different operation stages. The speci...

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Abstract

The invention belongs to the technical field of environmental protection and in particular relates to a method for cultivating high strength aerobic granular sludge. The method for cultivating high strength aerobic granular sludge comprises that refluxed activated sludge of a municipal sewage plant is taken as seed sludge, sodium acetate and sodium propionate are taken as a combined carbon source, and quick cultivation of high strength aerobic granular sludge is carried out in a sequencing batch intermittent technology at the temperature of 25 minus or plus 1 DEG C; after 20 days, mature aerobic granular sludge is formed, and organic matter removal capacity above 90% is realized; meanwhile, the aerobic granular sludge can maintain a stable structure for a longer time and is not broken within 15 minutes under the ultrasonic conditions of 20KHz and 65W.

Description

Technical field [0001] The present invention is an environmental protection technology field, which involves a training method of oxygen granular sludge. Background technique [0002] Compared with the good oxygen activity sludge method used in most urban sewage plants currently, the typical characteristic of good oxygen particles is a typical feature that it can be self -fixed without any carrier.This first manifested as its dense three -dimensional structure, not only to ensure that it can maintain a higher biomass in biological treatment, but also provides a protective role in the internal microorganisms through this three -dimensional structure, so it can withstand sudden environment changes; secondly, it has having a possession;The superior settlement performance, which makes the biological treatment process does not require the follow -up separation procedures in the current oxygen granular sludge treatment, saving the time and area of the reaction process.The land area req...

Claims

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Application Information

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IPC IPC(8): C02F3/12C02F3/30
CPCY02W10/10
Inventor 万春黎李笃中张沁澜李杰妮刘翔王利
Owner FUDAN UNIV
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