This article throws light upon the five stages in downstream processing. The five stages are: (1) Solid-Liquid Separation (2) Release of Intracellular Products (3). Downstream Processing means recovery of desired products from its crude extract. As we all know that downstream processing is a procedure of separation as well as recovery of yielded products that are manufactured by.

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The solids are removed manually.

Stages in Downstream Processing: 5 Stages

As the steam is supplied, the liquid gets concentrated and becomes viscous. It means the maintenance of stability and activity of desired products during storage and distribution. As already stated, there are several biotechnological products vitamins, enzymes which are located within the cells.

The cells are disrupted by the forces created at the point of contact. The compound gets itself distributed between two liquid phases based on the physical properties.

These filters are with specific pore sizes that are smaller than the particles to be removed. The filtrate that is free from suspended particles cells, cell debris etc. A few product recovery methods may be considered to combine two or more stages.

Most commonly used methods for concentrating such products are evaporation, membrane filtration, liquid-liquid extraction, adsorption and precipitation. Product isolation is the removal of those components whose properties vary considerably from that of the desired product.


Stages in Downstream Processing: 5 Stages

Tubular bowl centrifuge can be operated at a high centrifugal speed, and can be run in both batch or continuous mode. The cells break as they are forced against the wall of the vessel by the beads.

The charged polymers such as polyacrylic acid and polyethyleneimine are used. The capacity of the equipment is variable that may range from small laboratory scale to industrial scale. This is a question and answer forum for students, teachers and general visitors for exchanging articles, answers and notes.

Such proteins can be eluted by employing solutions in chromatography. Anybody can ask a question Anybody can answer The best answers are voted up and rise to the procexs.

In downstream processing, the products which are desired are purified and separated through fermentation or enzyme reactions. Sometimes, the required product vitamins, enzymes are located within the cells.

These compounds are inflammable; hence require specialised equipment for fire safety. Capture The starting point for product capture is a clean filtrate which contains desired product plus many different contaminants. In ion-exchange chromatography, the pH of the medium is very crucial, since the net charge varies with pH.

Preparative LC-MS is used for purification, while other mass-spectrometric methods are applied for identification and structure elucidation. Breakage of cells by subjecting them to heat is relatively easy and cheap. It refers to the purification of biosynthetic products from their crude preparation like tissue fluids or fermentation broth.


When a gas is introduced into the liquid broth, it forms bubbles. Typical operations to achieve this are filtration peocess, centrifugationsedimentationprecipitation, flocculationelectro-precipitationand gravity settling.

Downstream processing – Product isolation, purification and characterization – SINTEF

Cleaning and sterilization of such filters are easy. Ammonium sulfate increases downsteaming interactions between protein molecules that result in their precipitation. For example, expanded bed adsorption Vennapusa et al. By clicking the ” Agree “-button you are agreeing to our use of cookies. There are two types of membrane filtrations—static filtration and cross-flow filtration Fig.

Downstream Process

They are composed of a filamentous matrix such as glass wool, asbestos or filter paper. On the other hand, the larger molecules cannot pass through the pores and therefore come out downsrteaming with the mobile liquid Fig. Freeze-drying or lyophilization is the most preferred method for drying and formulation of a wide-range of products—pharmaceuticals, foodstuffs, diagnostics, bacteria, viruses.