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Method for treating wastewater by utilizing immobilized photosynthetic bacterium coupled film reaction system

A technology of photosynthetic bacteria and reaction system, which is applied in water treatment of special compounds, chemical instruments and methods, and wastewater treatment in processing processes, etc. It can solve the problems of weak resistance to pH load changes, poor tolerance of inorganic salts, and low degradation efficiency. , to achieve the effects of reducing operating costs, enhancing transfer, and high degradation efficiency

Active Publication Date: 2015-07-01
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the invention patent CN101712523A, the photosynthetic bacteria membrane bioreactor is used to treat wastewater. Compared with the traditional MBR, it achieves a higher treatment effect. Low degradation efficiency, poor tolerance to inorganic salts, weak resistance to pH load changes, and poor flocculation

Method used

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  • Method for treating wastewater by utilizing immobilized photosynthetic bacterium coupled film reaction system
  • Method for treating wastewater by utilizing immobilized photosynthetic bacterium coupled film reaction system
  • Method for treating wastewater by utilizing immobilized photosynthetic bacterium coupled film reaction system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1 Immobilized photosynthetic bacteria

[0035] Sulfonated SiO 2 / TiO 2 The specific preparation method of mesoporous composite microspheres is: completely dissolve 0.85g sodium dodecylbenzene sulfonate in 80ml dilute HCl solution (HCl concentration is 0.1mol / L); mix 3ml ethyl orthosilicate and 0.2ml Add butyl titanate to the above solution, then pour it into the reactor and let it stand for 15 hours in an oven at 60°C. Centrifuge the obtained product, wash with deionized water and vacuum dry to prepare SiO 2 / TiO 2 Composite microspheres. The high temperature calcination method is used to remove the surfactant in the pores. The composite microspheres are calcined at 600℃ for 6h to prepare SiO 2 / TiO 2 Mesoporous composite microspheres. The prepared SiO 2 / TiO 2 Mesoporous composite microspheres (1.0g) are completely immersed in 10ml CH 2 Cl 2 After ultrasonic dispersion, 4ml of chlorosulfonic acid was added to the above mixture, sonicated, and reacted at room tem...

Embodiment 2

[0041] Using the immobilized photosynthetic bacteria filler prepared in Example 1, the immobilized photosynthetic bacteria coupled membrane reaction system of the present invention was used to treat methylene blue dye wastewater, and the COD and chromaticity of the membrane effluent and the change of membrane flux during the operation of the reaction system were measured.

[0042] The indicators of methylene blue dye wastewater: dye concentration is 150mg / L, COD is 500-800mg / L.

[0043] The operating conditions of the membrane bioreactor: the wastewater enters the bioreactor (50L) containing immobilized photosynthetic bacteria (prepared in Example 1) through the peristaltic pump from the original water tank, and the light source is turned on at the same time, and the microorganisms metabolize and decompose the organic matter. The oxygen concentration is set to 0.5mg / L, the temperature is controlled at 30°C, the light intensity is set to 3000lux, the hydraulic retention time (HRT) is...

Embodiment 3

[0059] The methylene blue in the liquid enrichment culture solution of Example 1 was replaced with Scarlet 4BS dye, and the other operations were the same as in Example 1 to prepare immobilized photosynthetic bacteria filler. The immobilized photosynthetic bacteria coupled membrane reaction system of the present invention was used to treat the direct Scarlet 4BS dye wastewater. Measure the COD and chromaticity of the membrane effluent and the change of membrane flux during the operation of the reaction system.

[0060] Direct scarlet 4BS dye wastewater indicators: dye concentration is 100mg / L, COD is 400-600mg / L.

[0061] The operating conditions of the membrane bioreactor: consistent with Example 2;

[0062] The concentration of the immobilized photosynthetic bacteria filler (prepared in Example 1) in the bioreactor was 10 g / L, the dissolved oxygen concentration was 0.5 mg / L, the temperature was 30° C., and the light intensity was 3000 lux.

[0063] by Figure 5 It can be seen that t...

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Abstract

The invention discloses a method for treating wastewater by utilizing an immobilized photosynthetic bacterium coupled film reaction system. According to the method disclosed by the invention, novel sulfonated SiO2 / TiO2 mesoporous composite microspheres which are high in biocompatibility and photo-catalytic performance are taken as a substrate and an embedding method is adopted to prepare immobilized photosynthetic bacterium which is high in light utilization rate, high in degradation efficiency and resistant to wastewater load changes, so the transmission of photoelectrons inside the photosynthetic bacterium and between the photosynthetic bacterium and a carrier, and the degradation performance of the photosynthetic bacterium is remarkably improved; a novel film bio-reaction system is built by utilizing the efficient immobilized photosynthetic bacterium, the treatment effect on hardly-degradable printing and dyeing wastewater is effectively enhanced, the hydraulic retention time in an MBR system is shortened, the size of a biochemical pool is reduced, the operating cost is lowered, and the pollution of an MBR film is effectively alleviated.

Description

(1) Technical field [0001] The invention relates to a method for treating wastewater using a membrane bioreactor, in particular to a method for treating wastewater using an immobilized photosynthetic bacteria coupled membrane reaction system. The immobilized photosynthetic bacteria uses SO 3 H-SiO 2 / TiO 2 Mesoporous composite microspheres are the carrier. (2) Background technology [0002] Membrane Bioreactor (Membrane Bioreactor, referred to as MBR) is a highly efficient wastewater treatment technology that combines biological treatment and membrane separation processes. The membrane bioreactor can basically trap all the sludge particles and bacteria in the mud-water mixed liquid in the reactor, so that the activated sludge in the bioreactor does not flow out with the effluent, and the activated sludge has a longer residence time and a higher concentration. Based on the characteristics of high volumetric load of membrane bioreactor, good effluent quality, small footprint, and l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34
CPCC02F3/34C02F2103/24C02F2103/28C02F2103/30C02F2305/10
Inventor 张国亮秦磊范铮孟琴
Owner ZHEJIANG UNIV OF TECH
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