Dye wastewater deep purification and reuse system as well as method thereof

A technology for dye wastewater and deep purification, applied in the field of water treatment, can solve the problems of fouling, membrane fouling and clogging, and high investment and operating cost of membrane separation technology, so as to slow down membrane flux decline, prolong membrane life, and reduce organic pollution. and the effects of microbial contamination

Inactive Publication Date: 2016-10-05
GUANGDONG UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in practical applications, the investment and operating costs of membrane separation technology are relatively high, and the membrane is prone to fouling and clogging, requiring high-level pretreatment and regular chemical cleaning
Its serious membrane fouling has become a bottleneck restricting the further application of membrane technology

Method used

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  • Dye wastewater deep purification and reuse system as well as method thereof
  • Dye wastewater deep purification and reuse system as well as method thereof
  • Dye wastewater deep purification and reuse system as well as method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: Printing and dyeing wastewater enters the deep purification and reuse system of dye wastewater after conventional physical and chemical + biochemical treatment. Processed through the following steps:

[0035] 1) Preliminary filtration: Multi-layer screen is used to filter, large particle impurities are retained, and other parameters do not change much;

[0036] 2) Photocatalytic oxidation unit: The wastewater after the above treatment enters the photocatalytic oxidation reactor, and a three-dimensional foamed nickel mesh loaded with titanium dioxide is added to the reactor, with a total mass of 65.76 g; the light source is an ultraviolet lamp, and the reaction is carried out at 32°C for 120 minutes After that, the COD of the produced water decreased by 19%, the chroma decreased by 75%, and other parameters did not change much;

[0037] 3) Ultrafiltration membrane separation unit: The treated wastewater enters the ultrafiltration membrane separation unit. The...

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Abstract

The invention relates to a dye wastewater deep purification and reuse system as well as a method thereof. The dye wastewater deep purification and reuse system mainly comprises preliminary filter equipment (1), a light catalytic oxidation unit (3), an ultra-filtration membrane separating unit, a reverse osmosis membrane separating unit and an intelligent controller (10); the ultra-filtration membrane separating unit comprises a pump (4), an ultrafilter water tank (6), an ultra-filtration membrane subassembly (8); and the reverse osmosis membrane separating unit comprises a pump (5), a reverse osmosis water tank (7), and a reverse osmosis membrane subassembly (9). The dye wastewater deep purification and reuse system integrates the preliminary filter equipment, the light catalytic oxidation unit, the ultra-filtration membrane separating unit and the reverse osmosis membrane separating unit for realizing the integration; and has the advantages of simple structure and low cost, a photocatalysis technology is employed for reducing the washing number of the membrane and prolonging the membrane life-span, the dye wastewater reuse method has the advantages of simple steps and high recovery rate, and the water quality of the recycled water is better than that of the water used for textile dyeing and finishing industry.

Description

technical field [0001] The invention belongs to the field of water treatment, in particular to a deep purification and reuse system and method for dye wastewater. Background technique [0002] Since the "Twelfth Five-Year Plan", industrial water use has been strictly controlled, and deep purification and reuse of wastewater is the implementation method for enterprises to save energy and reduce emissions. More enterprises use reused water. In my country, the discharge of printing and dyeing wastewater ranks second in the discharge of wastewater in the industrial sector, reaching 2.3-3 billion cubic meters, second only to the paper industry; the discharge of pollutants occupies the fourth place. Therefore, the comprehensive treatment of wastewater in the printing and dyeing industry has become a top priority, and water reuse has become the key to wastewater treatment in the printing and dyeing industry. [0003] The pollutants in the tail water of the conventional physicochem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/08C02F103/30
Inventor 区文仕张国庆司徒文甫阳楚雄
Owner GUANGDONG UNIV OF TECH
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