Airlift reactor for treating soybean oil refining waste water by viscid trichosporon cutaneum

An air-lift reactor, the technology of Trichospora yeast, applied in biological treatment devices, natural water body treatment, water treatment parameter control, etc., can solve the problems of inability to efficiently treat wastewater, reduce yeast growth and oil production capacity, etc. To achieve the effect of efficient treatment and resource utilization, easy cleaning and maintenance, high interphase mass transfer and heat transfer efficiency

Active Publication Date: 2018-09-18
NORTHEAST DIANLI UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the bioreactors used for yeast to treat wastewater and produce microbial oil all adopt fixed pH conditions, but the pH conditions required for the growth and reproduction stage of yeast cells and the stage of accumulating oil and fat are different, and the pH required for the growth and reproduction stage of yeast cells is relatively low ( 5 to 6), the pH required for the oil accumulation stage is relatively high (6 to 7), these bioreactors generally adopt a uniform intermediate value, which reduces the growth of yeast and oil production capacity, and cannot meet the requirements of efficient wastewater treatment

Method used

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  • Airlift reactor for treating soybean oil refining waste water by viscid trichosporon cutaneum
  • Airlift reactor for treating soybean oil refining waste water by viscid trichosporon cutaneum
  • Airlift reactor for treating soybean oil refining waste water by viscid trichosporon cutaneum

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Experimental program
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preparation example Construction

[0043] Preparation of Neotrichosis marcescens suspension: Inoculate a single colony of Neotrichosis marcescens Cutaneotrichosporon mucoides preserved on the slant with the strain number CGMCC NO: 2.571 into 2-3L sterile Bacteria seed medium, cultured at 180rpm on a shaker at 30°C for 1 day to obtain a cultured suspension of Neotrichosis marcescens, and stored the obtained suspension in a refrigerator at 4°C for future use; wherein The dosage of each component in the seed medium of Neotrichosis marcescens is: glucose 70g / L; yeast extract powder 2g / L; MgSO 4 ·7H 2 O 1.2g / L; KH 2 PO 4 0.8g / L; (NH 4 ) 2 SO 4 2.5g / L; pH=6.0.

[0044] The operation of the airlift reactor and the treatment of refined soybean oil wastewater:

[0045] The operating temperature of the present invention is 25-30°C, and the refined soybean oil wastewater adjusted to a pH of 7 is added to 5 / 6 of the reaction tank body from the water inlet 12 of the reaction tank body 1, and then obtained in the abo...

example 1

[0046] Example 1: Operation of Airlift Reactor and Treatment of Refined Soybean Oil Wastewater

[0047] Airlift reactor construction: such as figure 1 As shown, it includes a reaction tank body, a cylinder body, a swirl plate, and a convex gas distributor; the middle part of the reaction tank body is provided with an air inlet, and a feed inlet is provided above the air inlet, and the lower part of the reaction tank body One side is provided with a water inlet, and the bottom is provided with a water outlet; the cylinder is arranged coaxially with the reaction tank and is located inside the reaction tank, which is used to divide the reaction tank into an upflow zone in the middle and a downflow zone around it. The upflow area is divided into an upper low pH area and a lower high pH area; the swirl plate is coaxially arranged with the reaction tank and is located at 4 / 5 of the cylinder body, and is used to guide part of the three-phase flow in the upflow area. The blades of th...

example 2

[0063] Example 2: Operation of Airlift Reactor and Treatment of Refined Soybean Oil Wastewater

[0064] Building an air-lift reactor: The construction of the air-lift reactor is basically the same as in Example 1, the difference is that the convex gas distributor is set at 3 / 5 of the cylinder, and the wall thickness of the convex gas distributor is 5mm ; The diameter of the air outlet is 3 mm, the radial angle of the air outlet is 45°, and the opening rate of the convex gas distributor is 20%.

[0065] The reaction system in the reaction tank is air-water two-phase, and the gas flow meter is 0.12m 3 / h, the gas holdup rate is 1.74%, and the volumetric oxygen mass transfer coefficient is 0.00062s -1 .

[0066] Treatment of refined soybean oil wastewater: the operating temperature of the airlift reactor is 27°C, the refined soybean oil wastewater adjusted to pH 7 is added from the water inlet of the reaction tank, the yeast suspension is added from the feed inlet, and the air ...

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Abstract

The invention relates to an airlift reactor for treating soybean oil refining waste water by viscid trichosporon cutaneum, and belongs to the technical field of waste water treatment. Aiming at the features of the soybean oil waste water, the airlift reactor which can not only realize the soybean oil refining waste water treatment and resource utilization but also obviously improve the waste watertreatment efficiency for treating soybean oil refining waste water by viscid trichosporon cutaneum is designed. A water bath jacket is coated outside a reaction tank; a heat insulation water inlet and a heat insulation water outlet are formed in the water bath jacket; a tube body is arranged inside the reaction tank body through a support block, wherein the upper part and the lower part of the tube body are communicated with the reaction tank body; the upper half part of the tube body is a low pH region; the lower half part is a high PH region; an air pipe passes through the reaction tank body and the air outlet of the tube body is arranged between the low PH region and the high PH region; in addition, the air outlet is upward; a gas distributor is arranged in an air outlet position of the air pipe; a cyclone plate is arranged at the upper end of the tube body. The air is used as thrust for realizing a multi-flow-phase reactor realizing the water circulation flowing and no need of mechanical stirring and pump lifting. The airlift reactor has the characteristics of simple structure, low energy consumption and the like, and can be widely applied to various fields of biological engineering, energy chemical industry, environment protection and the like.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment. Background technique [0002] Refined soybean oil wastewater contains high concentrations of oil and organic matter, if it is discharged directly without treatment, it will cause water environmental pollution. The domestic refined soybean oil wastewater treatment method generally adopts oil separation-coagulation air flotation-aerobic biological treatment, and the treated oil is landfilled after harmless treatment, and COD can meet the discharge standard. However, the above-mentioned process has high investment cost, large floor area, complex process, and only aims at removing oil and reducing COD in wastewater to treat refined soybean oil wastewater, wasting a large amount of oil and available organic matter in wastewater. Some microorganisms such as yeast, bacteria and mold use carbohydrates and oils as carbon and nitrogen sources to produce microbial oils in microbial cells. Mic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34C02F103/32
CPCC02F3/347C02F2209/22C02F2209/06C02F2209/02C02F2203/006C02F2103/322Y02W10/10
Inventor 施云芬任慧敏于大禹乔楠吴松余皓
Owner NORTHEAST DIANLI UNIVERSITY
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