Treating process of dilute emulsified oily watewater

A treatment process and oxidation treatment technology, applied in the field of water treatment, can solve problems such as large fluctuations in effluent indicators, air pollution, and impact on clean natural water sources.

Active Publication Date: 2008-12-24
BAOSHAN IRON & STEEL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. Deteriorating water quality and endangering aquatic resources;
[0004] 2. Harmful to human health;
[0005] 3. Air pollution;
[0006] 4. Affect crop production;
[0007] 5. Affect the natural landscape;
[0008] 6. Affect clean natural water sources
The problems of this type of process are: (1) complex process and poor safety; (2) high one-time investment cost; (3) high requirements for operation and daily management, and it is difficult to meet the emission standards stably; (4) high operating cost ; (5) The

Method used

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  • Treating process of dilute emulsified oily watewater
  • Treating process of dilute emulsified oily watewater

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Embodiment 1

[0047] The process of the present invention has been applied to Baosteel No. 5 cold-rolled steel strip project, and the treatment process of cold-rolled dilute emulsified oily wastewater is as follows:

[0048] (1) Uniform aeration adjustment, air is passed through the adjustment tank, and the air-water ratio is 5:1 to make the water quality and water quantity even;

[0049] (2) Primary and secondary pH adjustments, dosing chemicals through pneumatic regulating valves or metering pumps, and the dosage is interlocked with the pH meter for controlling wastewater;

[0050] (3) Coagulation and air flotation, add Jingshuiling with a concentration of 5% as a flocculant, and the dosage is 10mg / L, so that part of the dissolved oil in the wastewater can be separated out, and removed together with the slick oil under the action of air flotation ;

[0051] (4) Cooling, which can be the first-level cooling and cooling, or the second-level and above cooling;

[0052] (5) Biological contact...

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Abstract

The invention provides a technology for treating dilute emulsified oiliness wastewater comprising the steps of uniform aeration adjustment, one-stage pH regulation, two-stage pH regulation, coagulation, air floatation, cooling, biological contact oxidation, flocculation deposition, part sludge reflux, after the above steps, the effluent reaches the discharge standard or the recycling standard. The technology of the invention effectively overcomes the problems of weak safety, high requirement for operation running and daily management and secondary pollution and the like, furthermore has the advantages of low once investment, stable treatment effect, low production operation running cost and simple operation running.

Description

technical field [0001] The invention belongs to the field of water treatment, and in particular relates to a treatment process for dilute emulsified oily wastewater. Background technique [0002] Oily wastewater refers to wastewater containing lipids (fatty acids, soaps, fats, waxes, etc.) and various oils (mineral oils, animal and vegetable oils). Oily wastewater is characterized by high COD and BOD, certain odor and color, flammable, easy to oxidize and decompose, generally lighter than water, and insoluble in water. Its pollution is mainly manifested in the following aspects: [0003] 1. Deteriorating water quality and endangering aquatic resources; [0004] 2. Harmful to human health; [0005] 3. Air pollution; [0006] 4. Affect crop production; [0007] 5. Affect the natural landscape; [0008] 6. Affect clean natural water sources. [0009] In view of the pollution of oily wastewater, my country stipulates that the maximum allowable discharge concentration of oi...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F3/02C02F1/66C02F3/10C02F1/52C02F1/24C02F101/32
CPCY02W10/10
Inventor 徐正殷玫婕肖丙雁黄雪松
Owner BAOSHAN IRON & STEEL CO LTD
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