Device for improving water purification efficiency of ultra-filtration membrane by performing pre-treatment of activating persulphate by ferrous ions and application method thereof

A technology for activating persulfate and ferrous ions, used in chemical instruments and methods, oxidized water/sewage treatment, water/sewage treatment, etc. Contaminant removal and other issues, to achieve the effect of improving water purification efficiency, easy operation, and enhanced removal

Pending Publication Date: 2017-06-20
NAT ENG RES CENT OF URBAN WATER RESOURCE +1
2 Cites 10 Cited by

AI-Extracted Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problems of membrane pollution and trace organic matter removal in the operation of ultrafiltration membranes, and conventional pretreatment technology cannot effectively alleviate ultrafiltration me...
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Method used

In the present embodiment, the water body containing ferrous ion and persulfate is sent into the oxidative coagulation reaction tank 3, and persulfate is oxidized into ferric ion by ferrous ion, and ferric iron can be used as coagulant , form flocs through flocculation with particles, colloids, and macromolecular organic matter in the water body; at the same time, strong oxidants such as sulfate radicals and hydroxyl r...
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Abstract

The invention relates to a device for improving the water purification efficiency of an ultra-filtration membrane by performing pre-treatment of activating persulphate by ferrous ions and an application method thereof, and aims to solve the problems that membrane pollution exists in ultra-filtration membrane operating, a trace organic substance removal effect is poor, and the ultra-filtration membrane pollution cannot be relieved effectively and pollutant removal cannot be reinforced in a conventional pre-treatment technology. The device consists of a raw water pipeline, a ferrous ion adding device, a persulphate adding device, an oxidative coagulation reaction tank, a sedimentation tank and an ultra-filtration membrane assembly. According to the device for improving the water purification efficiency of the ultra-filtration membrane by performing the pre-treatment of activating the persulphate by the ferrous ions and the application method thereof, a synergistic effect between the ferrous ions and the persulphate can be fully played; the ultra-filtration membrane pollution is relieved effectively, and meanwhile, the removal of micropollutant is reinforced.

Application Domain

Water/sewage treatment by flocculation/precipitationWater/sewage treatment by oxidation

Technology Topic

Pre treatmentRaw water +8

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  • Device for improving water purification efficiency of ultra-filtration membrane by performing pre-treatment of activating persulphate by ferrous ions and application method thereof

Examples

  • Experimental program(9)

Example Embodiment

[0024] Specific implementation mode 1: Combination figure 1 To illustrate this embodiment, the device for ferrous ion-activated persulfate pretreatment to enhance the water purification performance of ultrafiltration membranes consists of raw water pipeline 6, ferrous ion dosing device 1, persulfate dosing device 2, oxidation mixing Condensation reaction tank 3, sedimentation tank 4 and ultrafiltration membrane module 5; the raw water pipeline 6 is provided with a ferrous ion dosing device 1 and a persulfate dosing device 2 in sequence along the water flow direction. The raw water pipeline The outlet of 6 is connected with the water inlet of the oxidation coagulation reaction tank 3, the water outlet of the oxidation coagulation reaction tank 3 is connected with the water inlet of the sedimentation tank 4, and the water outlet of the sedimentation tank 4 is connected with the ultrafiltration The water inlet of the membrane module 5 is connected.

Example Embodiment

[0025] Specific embodiment two: this embodiment is different from specific embodiment one in that: the water inlet of the sedimentation tank 4 is arranged in the lower part of the sedimentation tank 4, and the water outlet of the sedimentation tank 4 is arranged in the upper part of the sedimentation tank 4. Others are the same as the first embodiment.

Example Embodiment

[0026] Specific embodiment three: This embodiment is different from specific embodiments one or two in that the sedimentation tank 4 is a flat flow sedimentation tank, an inclined tube sedimentation tank, an inclined plate sedimentation tank or a high-density sedimentation tank. Others are the same as the first or second embodiment.

PUM

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Description & Claims & Application Information

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