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Advanced purification and recycling method and device of nondegradable organic industrial wastewater

A technology for industrial wastewater and deep purification, applied in the field of water treatment, can solve the problems of hindering application and promotion, high operating cost of advanced oxidation technology, and achieve the effect of reducing the burden

Active Publication Date: 2012-12-26
BEIJING CRYSTEC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The use of advanced oxidation technology to treat biologically refractory organic industrial wastewater is a future development trend, but the main problem hindering its application and promotion at this stage is that the operating cost of advanced oxidation technology is still relatively high

Method used

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  • Advanced purification and recycling method and device of nondegradable organic industrial wastewater

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Example 1: Coking wastewater enters the water quality deep purification system after conventional biochemical treatment. The following steps are processed:

[0020] 1) Medium filtration: Quartz sand medium is used, the diameter of medium particles is 0.8-1.2mm, and the backwashing cycle is 2 days. After treatment, the concentration of suspended solids in the produced water is reduced to 82mg / L, and other parameters have little change;

[0021] 2) Self-cleaning filtration: the filter disc is used as the medium, the filtration precision is 150um, the backwash cycle is 8h, the concentration of suspended solids in the produced water is 31mg / L, and other parameters have little change;

[0022] 3) COD decomposer: mainly ultrasonic, with a sound energy density of 0.21W / m 3 Ultrasonic irradiation and aeration for 240 minutes, the COD of the produced water decreased to 266mg / L, the ammonia nitrogen decreased to 77mg / L, and other parameters did not change much;

[0023] 4) Visi...

Embodiment 2

[0026] Example 2: Printing and dyeing wastewater enters the water quality deep purification system after conventional biochemical treatment, the influent water volume is 300L / h, water quality: COD1538mg / L, chroma 412 times, suspended solids 114mg / L, conductivity 3200us / cm, after Step processing:

[0027] 1) Medium filtration: Quartz sand medium is used, the diameter of medium particles is 0.8-1.2mm, and the backwash cycle is 1d. After treatment, the concentration of suspended solids in the produced water is reduced to 43mg / L, and other parameters have little change;

[0028] 2) Self-cleaning filtration: the filter disc is used as the medium, the filtration precision is 100um, the backwash cycle is 10h, the concentration of suspended solids in the produced water is 18mg / L, and other parameters have little change;

[0029] 3) COD decomposer: mainly ultrasonic, with a sound energy density of 0.23W / m 3 Ultrasonic irradiation and aeration for 300 minutes, the COD of the produced w...

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Abstract

The invention provides a method for carrying out water resource advanced treatment on nondegradable organic industrial wastewater subjected to conventional biochemical treatment, recycling high-quality water and implementing zero discharge of industrial wastewater. The water, which is discharged after carrying out conventional biochemical treatment on coking wastewater, dyeing wastewater or any other nondegradable organic industrial wastewater, is used as the treatment object, and an advanced oxidization technique, a membrane technique and an industrial water treatment technique are combined. The invention is characterized in that the method and device comprises the following hydraulic procedures and devices: 1) medium filtration: removing particles; 2) self cleaning and filtration; 3) COD (chemical oxygen demand) decomposer; 4) visible light catalytic oxidation; 5) ultrafiltration membrane section; and 6) reverse osmosis membrane section, thereby finally preparing the high-quality water as a substitute for new recycled water in production.

Description

technical field [0001] The invention belongs to the field of water treatment, and in particular relates to a treatment method for deep purification and reuse of refractory organic industrial wastewater. Background technique [0002] The deep purification and reuse of wastewater is the implementation method for enterprises to save energy and reduce emissions. In my country, the amount of organic industrial wastewater is increasing year by year. In 1995 alone, the discharge of industrial wastewater (excluding township enterprises) in my country was 22.3 billion tons, including 7.7 million tons of COD, 1,823 tons of heavy metals, 1,132 tons of arsenic, 2,504 tons of cyanide, 6,366 tons of volatile phenols and 64,341 tons of petroleum, of which only 12.3 billion tons of wastewater met the discharge standards. The rest, especially high-concentration refractory organic industrial wastewater, caused serious pollution to the environment. High-concentration refractory organic industri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F1/72C02F1/44
Inventor 沈军彦孟繁欣郭庆贺韩爱龙
Owner BEIJING CRYSTEC TECH
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