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Membrane pollution control method in membrane process reuse processing of fermentation industrial wastewater

A technology for industrial wastewater and membrane pollution, applied in osmosis/dialysis water/sewage treatment, chemical instruments and methods, membrane technology, etc., can solve problems such as reverse osmosis membrane damage, reduce the number and cycle, stabilize wastewater The effect of reducing membrane fouling

Inactive Publication Date: 2014-06-11
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems that organic substances, inorganic salts, and microorganisms cause complex pollution to the reverse osmosis membrane when the effluent from the biochemical treatment of fermentation wastewater is reused in the existing process, and frequent chemical cleaning is likely to cause damage to the reverse osmosis membrane, the present invention proposes A method for membrane pollution control in the membrane reuse treatment of fermented industrial wastewater, which can effectively prolong the service life of the membrane

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The water quality of the biochemical treatment effluent of a fermentation pharmaceutical factory is as follows: (as shown in Table 1)

[0022] Table 1

[0023] COD TN NH 3 -N NO 3 - NO 2 - pH Ca 2+ Mg 2+ Na + SO 4 2- Cl - Chroma 104.28 48.84 2.51 32.81 2.36 8.5 312 62.64 3758 508 4129 22

[0024] The "nanofiltration-reverse osmosis" double-membrane process of the present invention is used for advanced treatment of the biochemical effluent. The nanofiltration membrane used is HL8040F-365 produced by GE Company, and the reverse osmosis membrane used is AG8040F-400 WET type reverse osmosis produced by GE Company. permeable membrane. The steps are:

[0025] (1) The biochemical treatment effluent of a fermentation pharmaceutical factory in Table 1 is pretreated by quartz sand filtration, activated carbon filtration, and security filter.

[0026] (2) Step (1) After the water is discharged, it enters the nano...

Embodiment 2

[0033] In this example, HL8040F-365 nanofiltration membrane and AG8040F-400 WET reverse osmosis membrane are still used to treat the wastewater in Table 1 of Example 1. The steps are:

[0034] (1) Biochemical treatment of fermentation industrial wastewater The effluent is pretreated by quartz sand filtration, activated carbon filtration, and security filter.

[0035] (2) Step (1) After the water is discharged, it enters the nanofiltration system. During the operation of the nanofiltration membrane, a short-term, short-term non-pressurized, high-flow flushing is performed, and a short-term cyclic chemical cleaning is performed after a period of time.

[0036]When the pressure of the nanofiltration membrane is constant during the operation of the nanofiltration membrane, when the flux of the nanofiltration membrane drops by 30%, the machine will be shut down for physical flushing. At this time, it is a reversible membrane fouling. Fully open), large flow (150% of the influent f...

Embodiment 3

[0042] In this example, HL8040F-365 nanofiltration membrane and AG8040F-400 WET reverse osmosis membrane are still used to treat the wastewater in Table 1 of Example 1. The steps are:

[0043] (1) Biochemical treatment of fermentation industrial wastewater The effluent is pretreated by quartz sand filtration, activated carbon filtration, and security filter.

[0044] (2) Step (1) After the water is discharged, it enters the nanofiltration system. During the operation of the nanofiltration membrane, a short-term, short-term non-pressurized, high-flow flushing is performed, and a short-term cyclic chemical cleaning is performed after a period of time.

[0045] When the pressure is constant during the operation of the nanofiltration membrane, when the flux of the nanofiltration membrane drops by 25%, the machine will be shut down for physical flushing. At this time, it is reversible membrane fouling. Fully open), high flow (150% of the influent flow during normal operation) flus...

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Abstract

The invention which discloses a membrane pollution control method in the membrane process reuse processing of fermentation industrial wastewater. The method comprises the following steps: 1, sequentially filtering biochemical processed outlet water of the fermentation industrial wastewater by quartz sand and active carbon, and preprocessing the outlet water by a security filter; 2, allowing the outlet water obtained in step 1 to enter a nanofiltration system, carrying out non-pressurized flushing on the nanofiltration system, and carrying out circulating type chemical cleaning; 3, allowing the outlet water obtained in step 2 to enter a reverse osmosis system, carrying out non-pressurized flushing on the reverse osmosis system, and carrying out circulating type chemical cleaning to obtain final product water. The pertinent membrane pollution control method of the invention is adopted according to respective pollution characteristics of a nanofiltration membrane and a reverse osmosis membrane, so the frequency and the period of the chemical cleaning are reduced, service lives of membranes can be prolonged by above 30%, the wastewater reuse is efficiently and stably realized, and the membrane pollution is greatly mitigated.

Description

technical field [0001] The invention belongs to the field of water treatment, and more specifically relates to a method for controlling membrane pollution in the process of using a double-membrane process to biochemically treat effluent from fermentation industrial wastewater for reuse. Background technique [0002] my country's fermentation industry is well developed, and the level and scale of industries such as yeast, alcohol, citric acid, beer, vitamin C and monosodium glutamate rank among the top in the world. Therefore, it has great potential in industrial water saving and realization of wastewater recycling. Membrane separation technology is an emerging water treatment technology in recent years. Due to its advantages of good effluent quality, simple operation, small footprint, and low energy consumption, it has gradually been applied in industrial wastewater reuse treatment. [0003] At present, the "ultrafiltration-reverse osmosis" or "microfiltration-reverse osmosi...

Claims

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Application Information

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IPC IPC(8): B01D61/58C02F1/44
Inventor 任洪强许柯耿金菊丁丽丽张婷婷陈琳
Owner NANJING UNIV