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OPTIMIZATION AND METABOLIC CONTROL OF THE PRODUCTION OF AUTOTROPHIC MICROBIAL BIOMASS.

Objectif

THE PURPOSE OF THIS PROJECT WAS TO CONSTRUCT A TUBULAR LOOP PHOTOBIOREACTOR, AND TO EVALUATE ITS EFFICIENCY IN THE LONDON CLIMATE AS A MEANS OF STORING SOLAR ENERGY BY ALGAL MASS PRODUCTION. ALSO THE POSSIBILITY OF PRODUCING A BIOMASS RICH IN LIPID WAS TO BE INVESTIGATED.

A PHOTOBIOREACTOR CONSISTING OF 25M PYREX TUBING OF 1CM BORE (0.25 SQ.M) WAS CONSTRUCTED AND HOUSED IN A GLASSHOUSE OUTDOORS. THE PHOTOBIOREACTOR WAS INSTRUMENTED TOGETHER WITH A MICRO-COMPUTER FOR BOTH PROCESS CONTROL AND DATA-LOGGING. ACCURATE TEMPERATURE AND PH CONTROL WERE ACHIEVED.
THE MICRO-ALGA SPIRULA PLATENSIS WAS GROWN UNDER LIGHT-LIMITED CONDITIONS IN ORDER TO TEST THE SYSTEM. THE PHOTOBIOREACTOR HAS OPERATED CONTINUOUSLY FOR 4 MONTHS AND A STEADY STATE BIOMASS CONCENTRATION OF 10G DRY WEIGHT L TO THE POWER OF MINUS 1 WAS ACHIEVED. THE MAXIMUM OUTPUT RATE WAS 2G DRY WEIGHT M TO THE POWER OF MINUS 2 H TO THE POWER OF MINUS 1. THE MAXIMUM PHOTOSYNTHETIC EFFICIENCY ACHIEVED UNDER LIGHT-LIMITED CONDITIONS WAS 0.0181G DRY WEIGHT (KG) TO THE POWER OF MINUS 1.
THE FREEZE DRIED BIOMASS WAS FRACTIONATED INTO LIPID, CARBOHYDRATE AND PROTEIN APPROXIMATELY IN THE PROPORTIONS, 1:2:7 BY WEIGHT.
THE OBJECTIVES WERE ACHIEVED. IT IS CONCLUDED THAT, BY MEANS OF THE TUBULAR REACTOR, ALGAL CULTIVATION WITH MAXIMUM EFFICIENCY OF BIOMASS PRODUCTION CAN BE ACHIEVED UNDER THE LONDON CLIMATIC CONDITIONS.

Champ scientifique (EuroSciVoc)

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CSC - Cost-sharing contracts

Coordinateur

KING'S COLLEGE LONDON
Contribution de l’UE
Aucune donnée
Adresse
STRAND
WC2R 2LS LONDON
Royaume-Uni
Coût total
Aucune donnée

Participants (3)