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A multi-stage membrane separation device and method for treatment and reuse of fermentation wastewater

A technology for fermentation wastewater and treatment device, which is applied in water/sewage treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc. The effect of reducing operating costs

Active Publication Date: 2020-11-03
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] (1) The existing fermentation wastewater treatment process has problems such as large floor area, high operating cost, unrecyclable effluent, and huge amount of sludge generated.

Method used

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  • A multi-stage membrane separation device and method for treatment and reuse of fermentation wastewater

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Experimental program
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Effect test

Embodiment 1

[0048] figure 1 It is a structural schematic diagram of an embodiment of the multi-stage membrane separation device of the present invention.

[0049] combine figure 1 Introducing the device of the present invention, a multi-stage membrane separation device for advanced treatment and reuse of fermented wastewater in this embodiment mainly includes an inlet pool 1, anaerobic reactor 3, FO membrane module 7, and a liquid extraction pool 9 , nanofiltration membrane treatment device 11, precipitation device 16; MF membrane module 4 is included in the anaerobic reactor 3 and MF membrane module 4 is connected with water outlet pool 12 by suction pump 5, and water outlet pool 12 is connected with FO membrane by FO water inlet pump 6 The concentrated water of the FO membrane module 7 is connected to the outlet pool 12 through pipelines; the FO membrane module 7 is connected to the draw solution pool 9 through the draw solution pump 8 and the pipeline, wherein the draw solution pump 8...

Embodiment 2

[0061] use as figure 1 A multi-stage membrane separation process with the structure shown. The treatment device operates at room temperature, the influent is artificially prepared simulated alcohol wastewater, and its water quality indicators are: COD: 3300mg / L, NH 3 -N: 80 mg / L, TP: 16 mg / L. Control the inlet water temperature to 35°C with a heating rod, and control the pH of AnMBR to 6.8-7.2 by adjusting the amount of sodium bicarbonate added in the inlet water preparation. The inoculum sludge used in AnMBR was taken from Wuxi Meicun Wastewater Treatment Plant. The sludge was first sieved to remove large solid particles such as gravel, and then inoculated into the reactor. The initial concentration of suspended solids (MLSS) in the inoculum mixture was 3 g / L. In the process of sludge domestication, only MF membrane is used, its flux is controlled at 5LMH, and the initial influent COD concentration is 500mg / L. When the COD removal rate of the reactor is greater than 70%, ...

Embodiment 3

[0067] use as figure 1 A multi-stage membrane separation process with the structure shown. The treatment device operates at room temperature, the influent is artificially prepared simulated alcohol wastewater, and its water quality indicators are: COD: 3300mg / L, NH 3 -N: 80 mg / L, TP: 16 mg / L. Control the inlet water temperature to 35°C with a heating rod, and control the pH of AnMBR to 6.8-7.2 by adjusting the amount of sodium bicarbonate added in the inlet water preparation. The inoculum sludge used in AnMBR was taken from Wuxi Meicun Wastewater Treatment Plant. The sludge was first sieved to remove large solid particles such as gravel, and then inoculated into the reactor. The initial concentration of suspended solids (MLSS) in the inoculum mixture was 3 g / L. In the process of sludge domestication, only MF membrane is used, its flux is controlled at 5LMH, and the initial influent COD concentration is 500mg / L. When the COD removal rate of the reactor is greater than 70%, ...

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Abstract

The invention discloses a multi-stage membrane separation device and method for treatment and reuse of fermentation wastewater, and belongs to the technical field of sewage treatment. The device couples AnMBR, an FO membrane and a nanofiltration membrane for treating the fermentation wastewater. The fermentation wastewater is fed into an anaerobic membrane bioreactor to form effluent through a microfiltration membrane assembly, then under the action of a forward osmosis membrane, water molecules spontaneously pass through a forward osmosis membrane assembly to enter an absorption solution pool, and finally, high-quality reuse water is obtained through the treatment by a nanofiltration membrane system; at the same time, concentrated salt at one side of the nanofiltration membrane flows back to the absorption solution pool through a high-pressure pump to achieve recycling of an absorption solution. Nitrogen and phosphorus are recovered from an FO concentrated solution in a form of struvite, which is conductive to achieving wastewater reclamation. The method has the advantages that brand-new coupling is carried out on the microfiltration membrane assembly, the forward osmosis membrane assembly and a nanofiltration membrane assembly, finally, a multi-stage membrane separation technology is constructed, the nitrogen and the phosphorus are recovered in the form of the struvite, and finally, the reuse of the fermentation wastewater and energy and resource utilization are synchronously achieved.

Description

technical field [0001] The invention relates to a multi-stage membrane separation device and method for the treatment and reuse of fermented wastewater, belonging to the technical field of sewage treatment. Background technique [0002] The fermentation industry is a processing industry with grain and agricultural by-products as the main raw materials, mainly including alcohol, monosodium glutamate, starch, liquor, citric acid, starch sugar and other industries. With the advancement of science and technology and the acceleration of the pace of industrialization, the product space of the fermentation industry has been further expanded, the industrial chain has been continuously extended, and the development prospects are even broader. However, problems such as large water consumption and serious wastewater pollution in the fermentation industry seriously restrict the sustainable development of the fermentation industry. Fermentation wastewater has complex components and high...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F101/30
CPCC02F1/442C02F1/444C02F1/445C02F1/52C02F1/66C02F3/2853C02F9/00C02F2001/007C02F2101/30
Inventor 王新华李爽田媛张艺镤任月萍李秀芬
Owner JIANGNAN UNIV
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