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Method for induced culture of aerobic granular sludge by utilizing porous hydroxyapatite bio-carrier

A technology of aerobic granular sludge and hydroxyapatite, applied in biological water/sewage treatment, sustainable biological treatment, chemical instruments and methods, etc., can solve the problem of easy disintegration of influent water quality and limitation of aerobic granular sludge Promotion and industrialization, aerobic granular sludge debugging method and long cycle, to achieve the effect of reducing the risk of disintegration, shortening the cultivation time, and high compressive strength

Inactive Publication Date: 2017-07-21
UNIV OF JINAN
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Problems solved by technology

[0004] At present, the debugging period of aerobic granular sludge is long, and it is easy to disintegrate when the influent water quality changes suddenly, which limits the further promotion and industrialization of aerobic granular sludge technology

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  • Method for induced culture of aerobic granular sludge by utilizing porous hydroxyapatite bio-carrier

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Embodiment 1

[0020] The aerobic granular sludge is domesticated and cultivated in the SBR reactor. The inner diameter of the reactor is 10 cm, and the effective height-to-diameter ratio is 6:1. The reactor adopts bottom water inlet and middle drainage, and the drainage rate is 50%. Sludge, the volume of inoculated sludge accounted for 40% of the total volume of the reactor, and the sludge concentration was 4 g / L; while the reactor was inoculated with flocculent activated sludge, 5 g / L of porous hydroxyapatite biological carrier was added to induce domestication culture Aerobic granular sludge; the porous hydroxyapatite biocarrier used in SEM is shown in the appendix figure 1 . The porous hydroxyapatite biological carrier is microspherical, with a particle size of 0.2 mm and a specific surface area of ​​900 m 2 / m 3 , Porosity 50%.

[0021] When acclimating granular sludge, artificial simulated wastewater was used, the air volume on the surface of the reactor was controlled to be 2 m / min...

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Abstract

The invention relates to a method for induced culture of aerobic granular sludge by utilizing a porous hydroxyapatite bio-carrier. The method is characterized in that an SBR sequencing batch type reactor inoculates flocculent activated sludge, the height-diameter ratio of the reactor is (5-10) to 1, bottom water feeding is adopted, 2-10 g / L of porous hydroxyapatite is added at an initial culture stage of aerobic granular sludge to assist culture of the aerobic granular sludge, the surface rising flow speed of the reactor is controlled to 1.0-2.5 m / min, dissolved oxygen is 2-6 mg / L, the sedimentation time is 2-20 min, feed water COD load and ammonia nitrogen load of the reactor are gradually improved, and finally the aerobic granular sludge having good sedimentation property and not prone to water impact is cultured. The advantages of good biocompatibility, large specific surface area and the like of the porous hydroxyapatite are fully utilized, the aerobic granular sludge is rapidly cultured by adding the bio-carrier, and the cultured aerobic granular sludge reactor has the good degrading effect on organic matter and ammonia nitrogen.

Description

technical field [0001] The invention relates to a method for quickly cultivating aerobic granular sludge assisted by a porous carrier, and belongs to the technical field of wastewater biological treatment. Background technique [0002] Aerobic granular sludge technology is a spherical and regular granular microbial aggregate formed through the self-aggregation of microorganisms. It is a new type of efficient and sustainable biological development developed on the basis of anaerobic granular sludge. Nitrogen removal process. In the aerobic granulation process formed by the flocculation and proliferation of microorganisms themselves, many microorganisms are wrapped by extracellular polymers in the network framework formed by filamentous bacteria. Due to the strong metabolic complementarity among various microorganisms , so it can achieve the degradation of complex organic pollutants, withstand high organic loads, tolerate toxic substances, etc. [0003] Compared with the tra...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12
CPCC02F3/12C02F2305/06Y02W10/10
Inventor 魏东杜斌魏琴韩笑闫涛许伟颖张永芳
Owner UNIV OF JINAN
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