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Water treatment system and water treatment method for surface water

A water treatment system and surface water technology, applied in the field of water treatment, can solve the problems of increasing operating costs and water production costs, shortening the service life of ultrafiltration membranes, and increasing transmembrane pressure differences, and achieving strong current neutralization of adhesion frames Bridge ability, superior coagulation-flocculation effect, and small operating pressure loss

Pending Publication Date: 2019-06-14
WUHAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when ultrafiltration technology is used alone, due to membrane fouling, it will cause a decrease in flux and an increase in transmembrane pressure difference, shortening the service life of ultrafiltration membranes, increasing operating costs and water production costs, and limiting its development.

Method used

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  • Water treatment system and water treatment method for surface water

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Embodiment 1

[0051] Such as figure 1 As shown, the present embodiment provides a water treatment system for surface water, the water treatment system includes: an electrocoagulation device, an ultrafiltration membrane separation device and a mixed liquid internal reflux unit; wherein, the electrocoagulation device includes an electrocoagulation cell 2 , electrode plate and power supply 5; the ultrafiltration membrane separation device includes: a submerged ultrafiltration membrane pool 7 and an ultrafiltration membrane assembly 8; the mixed solution inner return unit includes a mixed solution inner return pipe 9 and a return pump 10, so The reflux pump 10 is arranged on the reflux pipe 9 in the mixed liquid;

[0052] Wherein, the first water inlet at the bottom of the electrocoagulation tank 2 communicates with the first conveying pipe 1, and the second water inlet at the bottom of the electrocoagulation tank 2 communicates with the output end of the return pipe 9 in the mixed solution. E...

Embodiment 2

[0059] The difference between this embodiment and embodiment 1 is: only the internal reflux ratio of the mixed solution in embodiment 1 is set to 110%, and the others are the same as in embodiment 1;

[0060] The device runs for 24 hours, and the turbidity of the effluent is 1.4NTU, UV 254 0.018cm -1 , the TOC concentration is 1.65mg / L, which meets the requirements of the "National Drinking Water Hygienic Standard (GB5749-2006)"; the transmembrane pressure difference of the ultrafiltration membrane module 8 is 12.4kPa, and the membrane flux is 52.6L / m 2 h, the device is operating normally.

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Abstract

The invention discloses a water treatment system and a water treatment method for surface water. The water treatment system comprises an electroflocculation device, an ultrafiltration membrane separation device, and a mixed liquid internal reflux device; the electroflocculation device is communicated with the ultrafiltration membrane separation device, and the mixed liquid internal reflux device is arranged between the electroflocculation device and the ultrafiltration membrane separation device. According to the water treatment method disclosed by the invention: electroflocculation and ultrafiltration are coupled and are supplemented by mixed liquid internal reflux to remove organic pollutants in a surface water body, so that the treated effluent can meet the requirements of 'Standards for Drinking Water Quality' (GB 5749-2006) of China. The process is simple in structure, the removal ratio of organic pollutants is high, the operation pressure loss of the membrane device of the ultrafiltration membrane is less, the decay rate of the membrane flux is low, and the frequency of backwashing of a membrane module is low.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and more specifically relates to a water treatment system and a water treatment method for surface water. Background technique [0002] Environmental pollution of surface water has become a problem that coexists with the shortage of water resources in the world today. A large amount of industrial wastewater and domestic sewage are continuously discharged to surface water bodies without treatment or only after simple treatment, and the non-point source pollution of surface water caused by the unreasonable use of chemical fertilizers, pesticides and other agricultural chemicals in vast rural areas has caused my country's surface The pollution of water environment has been aggravated, and the quality of water sources has been declining. According to reports, at present, 80% of the surface waters and more than 90% of urban water sources in China have been seriously polluted, and more than 85%...

Claims

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Application Information

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IPC IPC(8): C02F9/06C02F101/30
Inventor 贺杏华张荣堂刘杰胜
Owner WUHAN POLYTECHNIC UNIVERSITY
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