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Biolysis sludge phagocytosis method for improving sludge dewatering reduction performance by using myxobacteria

A technology of sludge dehydration and myxobacteria, which is applied in the direction of biological sludge treatment, etc., to achieve the effects of improving sludge dehydration reduction performance, saving dosage, broad-spectrum temperature and pH adaptability

Pending Publication Date: 2022-04-22
余冉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are no related reports on the application of myxobacteria to cell wall breaking and sludge dehydration reduction in excess sludge.

Method used

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  • Biolysis sludge phagocytosis method for improving sludge dewatering reduction performance by using myxobacteria
  • Biolysis sludge phagocytosis method for improving sludge dewatering reduction performance by using myxobacteria
  • Biolysis sludge phagocytosis method for improving sludge dewatering reduction performance by using myxobacteria

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: Examination of the effect of myxobacteria on the dehydration and weight reduction of excess sludge produced by CAST process treatment of municipal sewage

[0035] The process of the present invention is used to carry out batch treatment of sludge in the laboratory. The treated sludge comes from the sludge storage tank of a sewage treatment plant in Yangzhong. The plant adopts the CAST process, that is, the circulating activated sludge process. Sludge production is low.

[0036](1) Preparation of myxobacteria inoculum

[0037] Preparation of myxobacteria inoculum: Add SM01, CM02, MM03 and PM04 four kinds of myxobacteria into CAS liquid culture medium respectively, shake and culture at 30°C, 150r / min constant temperature shaker for 12-24h, and the fermentation is complete. Centrifuge the bacterial solution at 8000r / min for 10min, take the precipitate and resuspend it with sterile phosphate buffer, and adjust its concentration to 10 7 PFU / mL order of magnitude...

Embodiment 2

[0048] Example 2: The effect of myxobacteria on the dehydration and weight reduction of activated sludge produced by MBR process treatment of municipal sewage

[0049] The process of the present invention is used to carry out batch treatment of sludge in a laboratory, and the processed sludge comes from the MBR pool of a certain sewage treatment plant in Nanjing, which adopts the MBR process.

[0050] The experimental procedure and method are the same as in Example 1, except that the sludge is adjusted to MLSS at 2.8-3.1 g / L, and the temperature is at 30°C. The pH of the sludge was determined to be 7.05, and the water content was 98.5%.

[0051] The results of this experiment are as image 3 with Figure 4 shown. It can be seen that when the concentration of myxobacteria in the activated sludge reaches 10 6 Compared with the blank control group, the CST of the sludge treated by SM01, CM02, MM03 and myxobacteria biolysis for 12 hours decreased by 21.52%, 19.38% and 27.17%, ...

Embodiment 3

[0052] Example 3: Examination of the effect of myxobacteria on sludge dehydration and weight reduction under different reaction temperature conditions

[0053] The process of the present invention is used to carry out batch treatment of the sludge in the laboratory, and the source of the sludge is the same as that of Example 1.

[0054] (1) Preparation of myxobacteria inoculum

[0055] According to the experimental result in embodiment 1, select the dehydration performance and the reduction situation of the excess sludge that CAST process produces all have stronger effect SM01 preparation slime bacteria bacterial agent, concrete preparation method is with embodiment 1.

[0056] (2) Sludge pretreatment

[0057] After a day of natural sedimentation of the sludge, remove the lower layer of sediment, adjust the MLSS to 2.8-3.1g / L, and the moisture content to be about 98%. Stir the sludge evenly and divide it into 12 500mL glass conical flasks. Load 200mL sludge. This experiment...

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Abstract

The invention provides a biological lysing sludge phagocytosis method for improving sludge dewatering reduction performance by using myxobacteria, and belongs to the technical field of sludge dewatering reduction treatment. According to the method, the myxobacteria has specific wolf pack predation capacity and broad-spectrum predation performance, has the characteristics of splitting and preying gram-negative bacteria, gram-positive bacteria, archaea and fungi, has broad-spectrum pH and temperature adaptability and can cope with severe environmental conditions, and the myxobacteria are prepared into the microbial inoculum to replace conventional chemical agents, so that the microbial inoculum is a novel microbial inoculum. When the sludge dewatering and reducing agent is used for the dewatering and reducing treatment process of excess sludge of a municipal sewage treatment plant, the dewatering performance and the mechanical dewatering and reducing efficiency of the sludge can be obviously improved by 25% and 20% or above respectively; the method has the advantages of low equipment investment, simple operation, no secondary pollution and low energy consumption, is a novel biological treatment method for dewatering and reducing municipal sludge, and has good social, economic and environmental benefits.

Description

technical field [0001] The invention belongs to the technical field of sludge treatment, and in particular relates to the application of a group of wolves predation by a class of myxobacteria with strong stress resistance to deep dehydration and weight reduction of sludge. Background technique [0002] Sludge is a kind of floc with microbial flora as the main body, mixed with colloidal particles, metabolic waste and trace metal particles. It has the characteristics of loose structure, small particles, strong hydrophilicity and high water content. There are four forms of water in sludge, including pore water (about 70%), capillary bound water (about 20%), surface adsorption water and internal bound water (about 10%). Because sludge contains more colloidal substances and extracellular polymers, under the influence of ionic and intermolecular forces, water molecules are wrapped in cells and flocs, and the water inside cells is difficult to pass through conventional sludge. Rem...

Claims

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Application Information

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IPC IPC(8): C02F11/02
CPCC02F11/02
Inventor 余冉赵润玉
Owner 余冉
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