Photobioreactor

PHOTOBIOREACTOR

ARCHANA GAUTAM M.Sc. 3rd Sem.

BBAU lucknow

Introduction

The function of the bioreactor is to provide a suitable environment in

which an organism can efficiently produce a target product—the target product might be. Cell biomass Metabolite Bioconversion Product

The performance of any bioreactor depends on the following key factors:Agitation rateOxygen transferpHTemperature

Requirements Of Bioreactors

There is no universal bioreactor. The general requirements of the bioreactor are as follows:The design and construction of bioreactors must keep sterility from the start point to end of the process.Optimal mixing with low, uniform shear.Adequate mass transfer, oxygen.Clearly defined flow conditions.Feeding substrate with prevention of under or overdosing.Suspension of solids.Gentle heat transfer.Compliance with design requirements such as: ability to be sterilized; simple construction; simple measuring, control, regulating techniques; scale-up; flexibility; long term stability; compatibility with up- downstream processes; antifoaming measures.

Photobioreactor

A bioreactor is an installation for the production of microorganisms outside their natural but inside an artificial environment. The prefix “photo” particularly describes the bio-reactor's property to cultivate phototrophic microorganisms, or organisms which grow on by utilizing light energy.

These organisms use the process of photosynthesis to build their own biomass from light and carbon dioxide. Members of this group are Plants, Mosses, Microalgae, Cyanobacteria and Purple Bacteria.

Photobioreactor or PBR, is the controlled supply of specific environmental conditions for respective species.

Photobioreactor allows much higher growth rates and purity levels than anywhere in natural or habitats similar to nature.

Types Of Photobioreactor

1 Photobioreactor in general

1.1 Open system photobioreactor1.2 closed system photobioreactor

2 Photobioreactor types(closed system photobioreactor)

2.1 Tubular photobioreactors2.2 Plate photobioreactor2.3 Christmas tree photobioreactor2.5 Foil photobioreactor

Open System Photobioreactor

Open pond system

Closed System Photobioreactor

Tubular photobioreactors

Cont…

Christmas tree reactor Plastic plate photobioreactor

Compression OPS and CPS

Open Pond SystemClosed Photobioreactor System

Pond consist of closed loop recirculation channel in which mixing and circulation are provided by paddle wheel.

Depth=0.2—0.5mmUnwanted algal & microorganism

growth. Limitation=Loss of water

due to evaporation

Provide a controlled environment.

Biological &Physiological control.

Contamination level is low or less.

Limitation=High operating cost.