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Biological reaction systems are widely used in pharmaceutical, biotechnology, food fermentation and environmental protection industries, and their core function is to control biological reaction conditions to optimize the growth environment of microorganisms or cells and promote the generation of target products. In this process, the role of the valve is crucial, not only for fluid control, but also directly affect the stability of the system, hygiene standards and production efficiency. This paper will discuss the importance of valves in biological reaction systems, and analyze the key factors of their design and selection.

Cell culture technology has been widely used in many fields such as biopharmaceutical, genetic engineering, tissue engineering, food industry and environmental science. Animal cell culture is widely used for vaccine production, antibody preparation and protein expression, while plant cell culture is mainly used for plant active ingredient extraction, genetic modification and biosynthesis. In order to optimize the culture conditions and increase the cell growth and product yield, the selection and design of bioreactor are very important. In this paper, the culture process of animal and plant cells will be described in detail and their special requirements for bioreactors will be discussed.

With the continuous development of biotechnology, plant cell bioreactor has become an important tool for the production of high value-added biological products such as medicinal proteins, polysaccharides and secondary metabolites. The design of plant cell bioreactor directly affects its yield, stability and production cost, so it is very important to optimize its composition and design specification. In this paper, the key components of plant cell bioreactors and their design specifications will be discussed in detail.

Plant nutrition is a crucial link in agricultural production, affecting the growth, yield and quality of crops. In recent years, biological fermentation technology has been widely used in the field of plant nutrition, using the metabolism of microorganisms to decompose organic matter and convert it into nutrients that are more easily absorbed by plants, improve the utilization rate of fertilizer and improve the soil environment. The biological fermentation process of plant nutrients, its application in agriculture and the specific requirements for fermenters were discussed in this study.