Analysis and Application Practice of Stainless Steel Biological Fermentation Tank Technology:

1、 Core classification and structural characteristics

1. Equipment classification

According to the stirring method, it can be divided into mechanical stirring ventilation type and non mechanical stirring ventilation type. The former improves the dissolved oxygen rate by dispersing bubbles with blades, while the latter relies on airflow to achieve directional circulation with lower energy consumption.

According to the metabolic requirements of microorganisms, it is divided into aerobic and anaerobic types. Aerobic tanks are equipped with high-efficiency ventilation systems, while anaerobic tanks focus on sealing and gas displacement control.

2. Key points of structural design

• Tank material: SUS316L or S30408 stainless steel is preferred, with corrosion resistance meeting the GMP cleanliness requirements of the pharmaceutical and food industries, and a pressure tolerance of ≥ 0.3MPa.

Hybrid system: The mechanical stirring type is equipped with multiple layers of turbine blades, driven by magnetic coupling to avoid shaft seal contamination; The gas lift system uses a nozzle to atomize gas and create a density difference to promote circulation.

Control system: Integrated PLC automation module, real-time adjustment of temperature (± 0.5 ℃), pH (± 0.1), dissolved oxygen (± 2%), equipped with NIR spectrometer for online monitoring of metabolic product concentration.

2、 Cross disciplinary application scenarios

1. Pharmaceutical manufacturing

The production of antibiotics and vaccines relies on 50-500L medium-sized fermentation tanks, which are equipped with sterile air filters and in place sterilization systems, with a bacterial infection rate of<0.01%.

The cultivation of genetically engineered bacteria adopts a variant of photobioreactor, which regulates metabolic pathways by introducing specific wavelength light sources through optical fibers.

2. Food industry

Beer brewing uses conical bottom fermentation tanks, which increase yeast settling efficiency by 40%; The yogurt production line integrates multi-level pH feedback regulation to ensure that the activity of lactic acid bacteria is greater than 90%.

3. Environmental Protection and Energy

Organic waste treatment uses large-scale gas lift tanks with a capacity of over 2000m ³, and the biogas production rate can reach 0.8m ³/kg VS; The lipase immobilized carrier is directly integrated into the stirring shaft in biodiesel production.