Krishna Teja

 Direct Steam Injector (DSI) Direct Steam Injector (DSI) system, commonly used in sterilization processes for liquids. This system heats and sterilizes a liquid medium by directly injecting steam into it, ensuring rapid and efficient heating. Let me explain the process in detail, based on the components in the diagram: 1. Unsterile Medium In The process begins with the unsterile liquid medium entering the system. This medium will undergo heating and sterilization in subsequent stages. 2. Pre-heat Heat Exchanger The unsterile liquid first passes through the pre-heat heat exchanger . This heat exchanger uses residual heat (usually from the sterilized medium or cooling water) to preheat the liquid before the main heating phase. Preheating improves energy efficiency and prepares the liquid for sterilization. 3. Venturi Valve and Steam Injection After preheating, the liquid passes through a Venturi valve , where steam is directly injected into the medium. The Venturi effect creates a p...

Bioreactor Quiz Bioreactor Quiz 1. What is the main function of a stirred tank reactor (STR)? A) To immobilize cells on particles B) To increase oxygen transfer without stirring C) To homogenize and aerate the mixture D) To reduce turbulence and prevent mixing Submit Answer 2. Which feature differentiates an airlift reactor from a bubble column reactor? A) The presence of a mechanical stirrer B) The presence of a draft tube C) High-pressure operation D) Use of immobilized particles Submit Answer 3. Why are stirred tank reactors widely used in industry despite certain limitations? A) They are the most efficient bioreactors for all processes. B) They allow minimal loss in case of contamination. C) They produce high oxygen transfer rates without stirring. D) They can operate without seals. Submit Answer 4. Which type ...

 1. What is the primary function of the motor in a batch fermentor? A) To control temperature B) To drive the impeller C) To regulate pH D) To monitor oxygen levels Answer: B 2. The impeller in a batch fermentor helps to: A) Prevent contamination B) Introduce air C) Maintain homogeneity D) Measure flow rate Answer: C 3. What is the function of the cooling jacket in a batch fermentor? A) To introduce nutrients B) To control pressure C) To regulate temperature D) To filter exhaust gases Answer: C 4. In a batch fermentor, the inlet air filter ensures: A) Pressure stability B) Temperature control C) Sterile air supply D) pH balance Answer: C 5. What is the purpose of baffles in a fermentor? A) Measure oxygen levels B) Prevent vortex formation C) Monitor pH levels D) Control foam formation Answer: B 6. The primary function of a sparger in a batch fermentor is to: A) Measure temperature B) Control pH C) Introduce air or oxygen D) Regulate pressure Answer: C 7. In a stirred tank bioreacto...