Aerobic nitration granule sludge long-term storage and activity recovery method

An aerobic granular sludge and granular sludge technology, applied in chemical instruments and methods, water/sludge/sewage treatment, biological water/sewage treatment, etc. and other problems, to achieve the effect of complete activated sludge particles, easy operation and short recovery time.

Active Publication Date: 2014-06-25
BEIJING UNIV OF TECH
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AI Technical Summary

Problems solved by technology

At present, the storage of aerobic granular sludge is mainly carried out at low temperature, the sludge storage conditions are relatively harsh, and the storage cost is high, which is not conducive to the large-scale use and commercial promotion of aerobic granular sludge
After long-term storage of aerobic granular sludge at room temperature (>6 months), the activity recovery time of aerobic granular sludge is relatively long, which takes about one month, and the structure is unstable after recovery. The rate is low and cannot meet the ideal requirements

Method used

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  • Aerobic nitration granule sludge long-term storage and activity recovery method
  • Aerobic nitration granule sludge long-term storage and activity recovery method
  • Aerobic nitration granule sludge long-term storage and activity recovery method

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Experimental program
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Embodiment 1

[0019] The volume of the SBR reactor used was 21 L.

[0020] 1. Determination of COD treatment capacity and ammonia nitrogen removal capacity of aerobic granular sludge before storage. The aerobic granular sludge culture substrate in the SBR reactor uses sodium acetate as the only carbon source, the COD concentration is 700-800mg / L, the ammonia nitrogen concentration is 70-80mg / L, the phosphate concentration is 10mg / L, and the calcium ion concentration is 20mg. / L, pH=7.5, aeration rate is 0.3m 3 / h. Every 6 hours is a cycle, and 2 cycles are run every day. After each cycle, the removal capacity of COD and ammonia nitrogen is measured, and the removal capacity of COD and ammonia nitrogen can reach more than 90%.

[0021] 2. Preservation method of aerobic granular sludge: Take it out of the SBR reactor, wash it with distilled water 3 times, remove the nutrients on the surface, store it in a petri dish or other container (no need to seal), and then put Put it into a freeze dr...

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Abstract

The invention relates to an aerobic nitration granule sludge long-term storage and activity recovery method, belonging to the technical field of sludge granule storage and recovery. The method comprises the following steps: 1. determining the COD (chemical oxygen demand) and ammonia nitrogen removal capacity of the aerobic granule sludge before storage; 2. carrying out freeze-drying on the pretreated aerobic granule sludge, and storing; and 3. recovering activity of the stored granule sludge, and determining the COD and ammonia nitrogen removal capacity. The method can solve the problem of long activity recovery period of the nitrifying bacteria in the aerobic granule sludge after long-term storage.

Description

technical field [0001] The invention relates to a method for long-term storage and activity recovery of aerobic nitrification granular sludge, and belongs to the technical field of sludge particle storage and recovery. Background technique [0002] Aerobic granular sludge is a cell self-immobilized particle spontaneously formed under aerobic conditions discovered in recent years. It has good settling performance, high biomass, good hydraulic strength, and decreases under high volume load conditions. The good biological activity of decomposing higher concentration organic wastewater, the structure complexity of aerobic granular sludge, biodiversity, high biological interception in the reactor, and strong microbial activity make it have the advantages of denitrification, phosphorus removal and high concentration treatment. The capacity of organic wastewater and toxic wastewater; aerobic granular sludge is a biological particle with a compact structure, good sedimentation perfo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12C02F3/34
CPCY02W10/10
Inventor 李军张彦灼陈光辉卞伟王盟
Owner BEIJING UNIV OF TECH
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