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Method for improving biofilm culturing efficiency and application thereof

A biofilm reactor and biofilm technology, which is applied in biological treatment devices, chemical instruments and methods, biological water/sewage treatment, etc., can solve the problems of long time for acclimation and cultivation of low-temperature microorganisms, increased treatment costs, and easy shedding adaptability. , to achieve the effect of easy engineering promotion and application, fast film hanging speed, and not easy to remove film

Active Publication Date: 2021-03-19
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The operation of the invention is complicated, the acclimation and cultivation time of low-temperature microorganisms is too long, and a large amount of dosing is required, which increases the processing cost
[0007] Therefore, for the biofilm reactor wastewater treatment process, especially for MABR, in order to solve the key outstanding problems such as difficult formation of biofilm on the surface of the carrier, long film hanging period, easy shedding and narrow adaptability in actual engineering, and to promote For the high-efficiency application of biofilm method in wastewater with difficult film formation, it is of great significance to study an economical film formation method with short film formation time, strong biofilm, strong impact load resistance and good treatment effect.

Method used

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  • Method for improving biofilm culturing efficiency and application thereof
  • Method for improving biofilm culturing efficiency and application thereof

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Effect test

Embodiment 1

[0036] The present embodiment provides a kind of method that improves biofilm hanging film efficiency, specific content is as follows:

[0037]Adopt the method for the present invention to start co-rotating mass transfer biofilm-moving bed biofilm reactor (MBBR) to start film formation, at first the aerobic activated sludge that 1600mL concentration is 2500mg-VSS / L is inoculated in the MBBR system (effective The volume is 3.2L, semi-soft packing (polypropylene, Φ120, Jiangsu Nantai Environmental Protection Packing Co., Ltd.), 30% filling degree), the influent is municipal wastewater, the influent COD concentration is 410mg-COD / L, hydraulic retention The time (HRT) is 6h, the organic load of the reactor water is 0.41g-COD / (g-VSS·d), the stirring rate in the reactor is controlled at 120rpm, and the oxygen supply is provided by a microporous aerator to maintain the dissolved oxygen concentration (DO) is 2-4mg / L (DO fluctuates within the range of 2-4mg / L during operation), and the...

Embodiment 2

[0047] The present embodiment provides a kind of method that improves biofilm hanging film efficiency, specific content is as follows:

[0048] Adopt method of the present invention to start the same direction mass transfer anaerobic biofilm-anaerobic contact oxidation tank starts to hang film, at first 6L concentration is the digester sludge that 3500mg-VSS / L is inoculated in the anaerobic contact oxidation tank (effective volume 4.5m 3 , elastic filler (YCDT type, Jiangsu Nantai Environmental Protection Filling Co., Ltd.), 45% filling degree), the influent is methyl methacrylate MMA chemical wastewater, and the COD concentration of the raw water is 6000mg-COD / L. In this case, the influent COD concentration is 1500mg-COD / L, and the hydraulic retention time (HRT) is 6.7h. At this time, the influent organic load (OLR) of the reactor is 0.26g-COD / (g-VSS·d), and the reaction The stirring rate in the vessel is controlled at 120rpm, the pH range is 6.8-7.4 (the pH value fluctuates...

Embodiment 3

[0057] The present embodiment provides a kind of method that improves biofilm hanging film efficiency, specific content is as follows:

[0058] Adopt the method described in the present invention to start heterotropic mass transfer biofilm MABR to start hanging film, at first 500mL concentration is the secondary settling tank activated sludge of 3000mg-VSS / L to inoculate in the MABR system (effective volume is 1.54L, membrane module ratio Surface area is 84.5m 2 / m 3 ), the influent is toxic and difficult-to-treat acetonitrile (ACN) wastewater, its concentration is 314mg-ACN / L, and the corresponding COD concentration is 500mg-COD / L. At this time, the organic load (OLR) of the reactor is 0.32g-COD / ( g-VSS d), the rising flow rate in the reactor is controlled at 2.5cm / s, under the transmembrane oxygen partial pressure of 22-28kPa, with 14-17mL-O 2 The flow rate of / min provides bubble-free aeration to maintain the liquid phase dissolved oxygen (DO) concentration at 1.5-3mg / L (...

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Abstract

The invention relates to a method for improving biofilm formation efficiency and application thereof. The method comprises the following steps: inoculating activated sludge into a biofilm reactor, introducing wastewater to make the organic load of the inflow water of the reactor not higher than 0.5 g-COD / (g-VSS.d), and continuously operating culture induction until biofilm formation is completed.According to the biofilm culturing method, the formation of both an anisotropic mass transfer biofilm or a traditional homodromous mass transfer biofilm can be promoted, the biofilm can be rapidly cultured, the requirement of rapidly starting an anisotropic mass transfer biofilm reactor or a traditional homodromous mass transfer biofilm reactor can be met, and the application range of the method is wide; and the biofilm culturing method is high in biofilm culturing speed, simple to operate, not prone to defilming, free of addition of any medicament, free of treatment filler or carrier and highin wastewater treatment efficiency.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a method and an application for improving the efficiency of biofilm formation. Background technique [0002] With the continuous development of sewage treatment technology, the biofilm method has many advantages and technological advancements such as impact resistance, strong adaptability, high biomass, long generation time, less residual sludge, strong processing capacity, low power costs and Convenience of management, etc., are increasingly valued and widely used. In addition, biofilms have the characteristics of horizontal gene transfer, allowing microbial communities to spread adapted metabolic pathways and environmental heterogeneous substances, and resisting toxic inhibition. [0003] Among them, the membrane aerated biofilm reactor (MABR) is a novel gas-permeable membrane and biofilm coupled treatment system. The two outstanding features of the rea...

Claims

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Application Information

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IPC IPC(8): C02F3/34
CPCC02F3/34C02F2203/004C02F2203/006C02F2209/06C02F2209/08C02F2209/10
Inventor 李庭刚
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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