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Aerobic salt-resistant granular sludge cultivation method

A technology of granular sludge and cultivation method, applied in chemical instruments and methods, water/sludge/sewage treatment, biological water/sewage treatment, etc. and other problems, to achieve the effects of stable COD degradation and denitrification, less sludge inoculum, and strong resistance to salt shock.

Active Publication Date: 2014-10-08
NANJING GREEN ISLAND ENVIRONMENTAL ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to address the above-mentioned problems such as that the domesticated microorganisms in the high-salt wastewater in the prior art are easily affected by fluctuations in salinity, poor biological activity, unstable treatment effect, easy to exceed the standard of effluent, large amount of sludge inoculum, and serious waste of resources. To overcome the defects, provide an aerobic and salt-tolerant granular sludge cultivation method, which can domesticate aerobic and salt-tolerant granules with strong resistance to salt shock, high biological activity, stable COD degradation and denitrification effects, and good sludge settleability sludge, so that the effluent reaches the standard, and the amount of sludge inoculation required by this cultivation method is small, which can save a lot of manpower and material resources and avoid waste of resources

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Effect test

Embodiment 1

[0040] An aerobic salt-tolerant granular sludge cultivation method, comprising the following process steps:

[0041] (1) Preparation of mixed wastewater: high-salt wastewater and no-salt wastewater are prepared in proportion in a homogeneous tank to prepare mixed wastewater with a salt content of 3500mg / L, and the mixed wastewater is pumped into the sequencing batch activated sludge reactor;

[0042] (2) Sludge inoculation: Inoculate the dewatered sludge of the urban sewage plant in the sequencing batch activated sludge reactor filled with mixed wastewater, and the inoculum amount of the dewatered sludge of the urban sewage plant is the sequence batch type activated sludge reactor. 1% of the effective volume of the activated sludge reactor;

[0043] (3) Dosing powdered activated carbon: After inoculating the dewatered sludge of the urban water plant, inject 1kg / m into the sequencing batch activated sludge reactor 3 The amount of powdered activated carbon with a particle size ...

Embodiment 2

[0050] An aerobic salt-tolerant granular sludge cultivation method, comprising the following process steps:

[0051] (1) Preparation of mixed wastewater: high-salt wastewater and no-salt wastewater are prepared in proportion in a homogeneous tank to make mixed wastewater with a salt content of 3800mg / L, and the mixed wastewater is pumped into the sequencing batch activated sludge reactor;

[0052] (2) Sludge inoculation: Inoculate the dewatered sludge of the urban sewage plant in the sequencing batch activated sludge reactor filled with mixed wastewater, and the inoculum amount of the dewatered sludge of the urban sewage plant is the sequence batch type activated sludge reactor. 1.8% of the effective volume of the activated sludge reactor;

[0053] (3) Dosing powdered activated carbon: After inoculating the dewatered sludge of the urban water plant, inject 1.7kg / m into the sequencing batch activated sludge reactor 3 The amount of powdered activated carbon with a particle size...

Embodiment 3

[0060] An aerobic salt-tolerant granular sludge cultivation method, comprising the following process steps:

[0061] (1) Preparation of mixed wastewater: high-salt wastewater and no-salt wastewater are prepared in proportion in a homogeneous tank to prepare mixed wastewater with a salt content of 4000mg / L, and the mixed wastewater is pumped into the sequencing batch activated sludge reactor;

[0062] (2) Sludge inoculation: Inoculate the dewatered sludge of the urban sewage plant in the sequencing batch activated sludge reactor filled with mixed wastewater, and the inoculum amount of the dewatered sludge of the urban sewage plant is the sequence batch type activated sludge reactor. 1.5% of the effective volume of the activated sludge reactor;

[0063] (3) Dosing powdered activated carbon: After inoculating the dewatered sludge of the urban water plant, inject 1.5kg / m into the sequencing batch activated sludge reactor 3 The amount of powdered activated carbon with a particle s...

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Abstract

The invention discloses an aerobic salt-resistant granular sludge cultivation method. The method comprises the steps of mixed wastewater preparation, sludge inoculation, powdery active carbon addition, closed aeration, aeration and salinity increase. Aerobic salt-resistant granular sludge with strong salinity impact resistance, high bioactivity, stable COD degradation and nitrogen removal effects and good sludge settlement can be obtained by domesticating through the aerobic salt-resistant granular sludge cultivation method, so discharged water reaches standards; and the inoculation amount of sludge required by the cultivation method is small, so manpower and material resources can be saved, and resource waste can be avoided.

Description

[0001] technical field [0002] The invention relates to the technical field of environmental engineering wastewater treatment, in particular to an aerobic salt-tolerant granular sludge cultivation method. [0003] Background technique [0004] High-salt wastewater has a high content of inorganic salts. Under strong osmotic pressure, a large amount of water molecules in ordinary microorganisms will penetrate into the aqueous solution outside the body, causing cells to lose water and shrink. In severe cases, microorganisms will die. Activated sludge in a saline environment has a salt concentration in the cell fluid in the microorganism body that is similar to that in the extracellular wastewater, so it can maintain normal life activities in this concentration of high-salt wastewater, but when the extracellular water environment has a little salt When there is a fluctuation, the osmotic pressure changes, and the microbial cells shrink from water loss or swell after absorbi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12
CPCY02W10/10
Inventor 李家祥余泽强
Owner NANJING GREEN ISLAND ENVIRONMENTAL ENG
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