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BIOLOGICAL FERMENTING TANK

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CAS: BIOLOGICAL FERMENTING TANK 
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Updated on: 2019-12-13
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Description
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This kind of fermentation tanks and seeding tanks are made from carbon steel, stainless steel, high nickel-based alloys and so on, and they are mainly used for biochemistry fermentation production, such as the production of monosodium glutamate, citric acid, enzyme preparations, solvents for pharmaceutical, food and other industries. This product is designed according to the petroleum products, chemicals, a machine of the. In addition, as the main parameter for reference, GB150-2011is used to manufacture, inspect and accept this tank.

I. The Basic Conditions for Fermentation Tanks

The mechanical agitation fermentation tank is one of the common types used in the fermentation plant. It uses mechanical agitators to completely mix air and the mash, and make the oxygen dissolved in the mash, which guarantees the enough supply of oxygen for microbial growth, reproduction and fermentation. Several basic requirements needed to make fermentation tanks as followed: 
1.Fermentation tanks should have suitable scale of diameter to height, which is generally about 1.7 to 4, the longer the tanks are, the higher the utilization rate of oxygen will be.
2.Fermentation tanks can bear certain pressure. When fermentation tanks are normally working or being disinfected, there will certain pressure (hydraulic pressure and pneumatic pressure) and temperature in the tanks, so all of their components must have certain strength to bear the pressure.
3.The stirring and ventilating device in fermentation tanks make the gas and the liquid fully mixed to make sure that the fermentation broth must dissolve oxygen.
4.Fermentation tanks should have sufficient cooling area. In the process of microbial growth and metabolism, it will release a lot of heat. So in order to control the temperatures on different stages in the fermentation process, it should be equipped with adequate cooling area.
5.Fermentation tanks must minimize dead corners to avoid accumulation of dirt, so it can be thoroughly sterilized to avoid bacterial contamination.
6.The seal of agitators should be tight to minimize leakage.

II. The Size Scale of Fermentation Tanks
There is a certain scale of the size of each part of the tank. The scale of height to diameter of the tank is about 1.7 to 4.
Fermentation tanks usually are equipped with two sets of agitators. The distance between the two sets of agitators (S) is about three times as the diameter of the agitator. For large-scale fermentation tanks or those that have high liquid depth (HL), they can install three or more sets of agitators. It will be better if the agitator at the bottom is close to the exit of air dust, and the distance to the bottom of the tank (C) equals to the diameter of the agitator (Di), but could not be less than 0.8 times of Di, otherwise it will affect the cycle of liquid.

III、The Structure of Fermentation Tanks
An aerobic mechanical agitation fermentation tank is sealed compression equipment. Its main components include the tank, agitator, seal, a bubbler, couplings, intermediate bearings, air blowing pipe (or air ejector), baffle, cooling device, manhole, pipeline, etc.

Technical Parameters

Nominal Volume(m3)

Shell diameter(mm)

Shell Height(mm)

Heat exchanger area(㎡)

Mixing shaft rotational speed(r.p.m)

Mixing shaft power{kw}

10

1800

3800

14

160—260

17—22

15

2000

4800

18

160—260

22—30

20

2200

5000

22

160—260

30—37

30

2400

6600

34

150—250

45—55

40

2600

7500

45

150—250

55—75

50

2800

8000

58

150—250

55—90

60

3000

8300

65

150—250

65—115

75

3200

8800

84

150—250

90—145

100

3600

9400

114

150—250

120—125

150

4200

10800

165

150—250

165—275

200

4600

11500

220

140—240

215—360


Main technicial parmeters of fermenting and seeding tanks

Nominal Volume(m3)

Diameter of internal tank(φmm)

Inner tank height(mm)

Diameter of jacket (φmm)

Mixing shaft rotational speed(r.p.m)

Mixing shaft power(kw)

0.05

300

700

400

300—350

0.55

0.1

400

800

500

300—350

0.75—1.1

0.2

500

1000

600

280—340

0.75—1.5

0.3

550

1200

550

280—340

1.1—1.5

0.5

600

1650

700

280—320

1.5—2.2

0.8

800

1600

900

200—280

2.2—2.5

1.0

800

1900

900

200—280

2.2—2.5

1.2

900

1800

1000

200—280

3—7.5

1.5

900

2200

1000

200—280

3—7.5

2.0

1000

2500

1100

200—260

4—11

3.0

1200

2600

1300

200—260

5.5—11

4.0

1300

3000

1400

200—220

7.5—15

5.0

1400

3200

1500

180—220

7.5—18.5

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