System device for improving biodegradability of finishing liquid wastewater and treatment method

A fairing solution, biochemical technology, applied in the fields of metallurgical wastewater treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc. Increases biodegradability, facilitates separation, increases efficiency

Active Publication Date: 2018-01-05
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The organic matter in the light leveling liquid has many pollutants, BOD 5 Low (biochemical oxygen demand) and poor biodegradability. Traditional biological treatment is difficult to work. At present, most of them are diluted and mixed with other wastewater. There is no mature treatment process at home and abroad. It is the most difficult steel industry wastewater to treat. one

Method used

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  • System device for improving biodegradability of finishing liquid wastewater and treatment method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The water quality pH of the finishing liquid wastewater was 7.9, the BOD5 was 345 mg / L, the BOD5 / CODcr was 0.07, and the suspended matter was 78 mg / L.

[0040] The fairing liquid waste water flows into the single-bag filter through the inlet pump, and the impurity particles in the fairing liquid are intercepted in the filter bag. The filtration precision of the single bag filter is 7 microns, the filter bag is made of polyester material, and the flow rate is 3m3 / h. After passing through the single-bag filter, the suspended solids of the fair-cleaning wastewater was 15 mg / L.

[0041] Then enter the ceramic membrane filter through the booster pump. The ceramic membrane filter is a precision ceramic filter material with a porous structure, which is sintered at high temperature such as alumina. The porous support layer, the filter layer and the microporous membrane layer are distributed asymmetrically. The filtration precision of the ceramic membrane filter is 0.5 microns...

Embodiment 2

[0047] A treatment process system for improving biodegradability in fairing liquid wastewater, including an inlet pump, a single-bag filter, a booster pump, a ceramic filter, an ultraviolet photochemical reactor, a parallel UV lamp tube, and quartz sand-loaded titanium vanadium light Catalyst, drain pump.

[0048] The water quality pH of the finishing liquid wastewater was 8.4, the BOD5 was 402 mg / L, the BOD5 / CODcr was 0.13, and the suspended matter was 111 mg / L.

[0049] The fairing liquid waste water flows into the single-bag filter through the inlet pump, and the impurity particles in the fairing liquid are intercepted in the filter bag. The filtration precision of the single bag filter is 7 microns, the filter bag is made of polyester material, and the flow rate is 8m3 / h. After passing through the single-bag filter, the suspended solids of the finishing wastewater was 16 mg / L.

[0050] Then enter the ceramic membrane filter through the booster pump. The ceramic membrane...

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Abstract

The invention discloses a treatment system device for improving biodegradability of finishing liquid wastewater. The device comprises a water inlet pump and a single-bag filter which is connected withthe water inlet pump, the single-bag filter is connected with a booster pump, a ceramic membrane filter and an ultraviolet photochemical reactor in sequence; the outer part of the ultraviolet photochemical reactor is composed of a quartz glass tube, and the interior of the quartz glass tube is provided with parallel-type UV lamps; a quartz sand supported titanium and vanadium ultraviolet light catalyst covers the outer parts of the UV lamps; and the ceramic membrane filter is a precise ceramic filter material which is formed by high temperature sintering of aluminium oxide and the like and has a porous structure. The invention also discloses a process for treating the finishing liquid wastewater by utilizing the system device. According to the invention, wastewater biodegradability is increased, and after the wastewater is treated by the process provided by the invention, treated finishing liquid wastewater can directly enter a conventional biochemical pool for treatment.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a process and a device for improving the biodegradability of fairing solution wastewater. Background technique [0002] The finishing liquid is an important medium used in the steel wet leveling process. The organic matter of the finishing solution has many pollutants, BOD 5 Low biochemical oxygen demand (BOD) and poor biodegradability make traditional biological treatment ineffective. At present, most of them are diluted and mixed with other wastewater for treatment. There is no mature treatment process at home and abroad, and it is the most difficult iron and steel industry wastewater to treat. one. [0003] The developed process to improve the biodegradability of finishing liquid wastewater takes green process and energy conservation and emission reduction as the main tasks, reduces environmental pollution, and actively responds to increasingly strict env...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/16
Inventor 李恩超刘道清侯红娟武晟石洪志叶倩胡利光郑洪珠
Owner BAOSHAN IRON & STEEL CO LTD
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