Method and device for treating a great variety of waste emulsion of high concentration using hyperfiltration membrane method

A waste emulsion and high-concentration technology, which is applied in the field of waste water and waste liquid treatment and waste liquid treatment, can solve the problems of complex components and difficult centralized treatment, achieve high packing density, avoid waste liquid discharge, and increase system operation stability and the effect of shock load resistance

Active Publication Date: 2008-11-26
GO HIGHER ENVIRONMENT GRP CO LTD
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

Various treatment methods have their own characteristics and applicable conditions, and because of the wide variety of waste emulsions, complex components, oil content and oil forms in water are also different, making it often difficult to centralize treatment

Method used

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  • Method and device for treating a great variety of waste emulsion of high concentration using hyperfiltration membrane method

Examples

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Effect test

Embodiment 1

[0032] Example 1: In the physical and chemical workshop of the Beijing Hazardous Wastewater Treatment Center, the emulsified waste liquid comes from various machinery factories, steel factories, and laboratories, and contains a large amount of organic oil and surfactant, with a COD of 100,000-120,000 mg / L and a small amount of organic matter. The waste liquid is treated by the method and device of the present invention, with a treatment capacity of 4500t / y (15.0t / d). After being treated in the sewage treatment workshop, the oil content in the effluent water quality of the waste liquid is 50-100mg / L, reaching << Sewage Comprehensive Discharge Standard "GB8978-1996 first-class water quality requirements, the oil scum recovered by the air flotation unit is sent to the next unit to refine and recover the oil resources in it.

Embodiment 2

[0033] Example 2: The waste emulsion from a mechanical processing factory has a COD of 50,000-80,000 mg / L, and the waste liquid is treated by the method and device of the present invention, with a treatment capacity of 25.0t / d, and one device operates stably After going to the sewage treatment workshop for treatment, the oil content in the effluent water quality of the waste liquid is 20-50 mg / L, which meets the first-class water quality requirements of the "Integrated Wastewater Discharge Standard" GB8978-1996, and the oil scum recovered by the air flotation unit is sent to the The oil resources in the next unit are refined and recovered.

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Abstract

The invention discloses a method for treating the waste emulsion with high concentration and a plurality of varieties by an ultrafiltration membrane method and a device thereof, which belongs to the technical field of waste water and waste liquid treatment. The main technique of the invention is 'dissolved air flotation-ultrafiltration membrane-electrolysis floatation', which can effectively reduce the dosage of medicament and improve emulsion breaking effect by adopting an efficient dissolved air flotation system, moreover, the water for dissolved air flotation, which is taken from a subsequent intermediate water tank, can flexibly adjust and dilute the concentration of the waste water, thus improving the running stability and the shock resistant loading capability of the system. An ultrafiltration membrane with large flux, high separative efficiency and long service life is adopted in an ultrafiltration system to realize oil-water separation and to concentrate the emulsion for a plurality of times and then floating oil is recovered, the waste water generated in ultrafiltration washing is treated again after reflow, thus reducing waste liquid discharging. Electrolysis floatation can remove residual emulsified oil and dissolved oil in the waste water, thus further lowering the COD value of yielding water. When the quality of raw water is changed, an activated carbon adsorption unit can guarantee the quality of the yielding water to be standard. The method and the device of the invention can process waste emulsion with high concentration and a plurality of varieties and have simple and reasonable technique, good quality of yielding water, compact layout of the device, thus facilitating automatic control and realizing recovery of emulsion and recycle economy as well as changing waste to be profitable simultaneously.

Description

technical field [0001] The invention relates to a method and device for treating waste liquid, in particular to a method for treating high-concentration and various types of waste emulsion by ultrafiltration membrane method and a device for realizing the method, belonging to the technical field of waste water and waste liquid treatment. Background technique [0002] For a long time, my country's water environment has been facing the dual pressure of water pollution and water resource shortage. my country accounts for 6% of the world's water resources, but the per capita water resources are only 1 / 4 of the world's average level. It is listed by the United Nations as one of the 13 most water-deficient countries in the world. Among the more than 600 cities in China, more than 400 are currently short of water, and more than 100 of them are seriously short of water. Moreover, the water-scarce areas have expanded from North China and Northwest China to areas rich in water resourc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/44C02F1/00B01D17/00B01D61/14
Inventor 陈福泰范正虹麻丽峰邢林林
Owner GO HIGHER ENVIRONMENT GRP CO LTD
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