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Treatment of high-concentration oily waste water

A treatment process and high-concentration technology, applied in biological water/sewage treatment, water/sludge/sewage treatment, sustainable biological treatment, etc., can solve problems such as high cost, unsatisfactory treatment effect, and difficulty in waste sludge treatment. Achieve the effect of low processing cost, good application prospect and promotion value, and ability to inhibit miscellaneous bacteria

Active Publication Date: 2007-11-21
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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Problems solved by technology

[0006] The purpose of the present invention is to overcome the need to consume a large amount of acid in the treatment of high-concentration organic wastewater in the prior art, the treatment of the waste oil sludge obtained by acidification is very difficult and costly, and the generation of a large amount of salt in acid-base neutralization makes the subsequent treatment effect Unsatisfactory or high cost defects, so as to provide a method that requires only a small amount or no need to input acid solution, does not produce a large amount of salt, has good treatment effect, low cost, and can obtain yeast single-cell protein during wastewater treatment. Treatment Technology of High Concentration Oily Wastewater

Method used

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  • Treatment of high-concentration oily waste water

Examples

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Effect test

Embodiment 1

[0020] On the device shown in Figure 1, the salad oil wastewater produced by an alkali refining process in a salad oil refinery is treated.

[0021] Firstly, the yeast strains purchased from the "General Microbiology Center of China Microbiological Culture Collection Management Committee" and the preservation numbers are CGMCC No2. The primary SBR reactor 3 (reactor volume 22.4L, using mesopore aeration) is used for the treatment of the above-mentioned salad oil processing wastewater (that is, high-concentration organic wastewater). The treatment conditions are 12 hours of aeration, 2 hours of static In the operation mode of sinking and draining, under the control of the gas flow meter 6, air is blown into the first-stage SBR reactor 3 through the air compressor 5, the dissolved oxygen is controlled below 2.0 mg / L, and the pH is 6. The yeast The concentration of bacteria in wastewater is 12g / L, and the BOD load of treatment is 1.5 kg of BOD per kg of yeast per day, and the COD...

Embodiment 2

[0026] On the device shown in Figure 1, the high-concentration oily wastewater discharged from a certain salad oil refinery using the alkali refining process is treated.

[0027] The first-level SBR reactor 3 (reactor volume 22.4L, adopts mesopore aeration) accesses the yeast strains with preservation numbers: CGMCC No 2.2156, 2.2158, 2.2165, 2.1207, and 2.1764 to treat the above-mentioned high-concentration oily wastewater processing. The treatment conditions are 10 hours of aeration, 2 hours of static settling and draining operation mode. Under the control of the gas flow meter 6, air is blown into the primary SBR reactor 3 through the air compressor 5, and the dissolved oxygen is controlled at 2.0 mg. Below / L, pH at 6, the concentration of the yeast in the wastewater is 10g / L, and the BOD load of the treatment is 1.0 kg of BOD per kg of yeast per day, the COD of the influent Cr The concentration is 15000mg / L; after mixing the effluent treated by yeast with part of the raw...

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Abstract

Treatment of high-concentration organic waste water for grease process and discharge in refinery is carried out by applying saccharomycete for one-level SBR, aerating, biologically degrading for high-concentration CODCr and oil, mixing it with partial crude waste water, passing through active sludge second-level SBR, drastic treating, making outlet CODCr<100 mg / L and discharging up to standard. It's cheap, stable and automatic, has excellent load resisting and microbial-inhibiting performances. It can be used for middle-medium grease refinery plant.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, and in particular relates to a treatment process for oil processing and high-concentration organic wastewater discharged from refineries. Background technique [0002] With the continuous improvement of people's living standards, my country's oil processing industry is also developing rapidly. Over the past 20 years, the refined vegetable oil production and processing industry has achieved rapid development. By 2000, there were more than 5,000 oil processing enterprises of various sizes. The wastewater produced by these oil refineries generally contains 2 to 5% oil. If this part of oil is discharged directly without recycling or treatment, it will cause great pollution to the surrounding environment. The general water quality characteristics of domestic oil factory processing wastewater are listed in Table 1. The pollutants in the wastewater are mainly organic matter such as oil, soap stock,...

Claims

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Application Information

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IPC IPC(8): C02F3/30C02F3/34C02F3/12
CPCY02W10/10
Inventor 杨敏吕文洲孙玉红张昱齐嵘
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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