Study of a process for the production of superior quality juices

Project Information

Grant agreement ID: CR153491-BRE21499

Project closed

Start date 1 February 1995

End date 31 January 1997

Funded under

• Specific programme of research and technological development in the field of industrial and materials technologies - CRAFT -, 1990-1994

Total cost No data

EU contribution No data

Coordinated by

ITALIAN AGENCY FOR NEW TECHNOLOGY, ENERGY AND THE ENVIRONMENT
Italy

Objective

Micro or ultrafiltration can be used to separate the pulp from the serum. In this way it is possible to stabilise the juice by a slight thermal treatment, limiting the strong treatment to pulp only. A high reduction of enzyme activity in clear juice can be achieved by ultrafiltration.

The concentration step is performed by a sort of direct osmosis in which water is removed from the juice by a hypertonic solution (called extractant) flowing downstream a selective membrane. The more innovative aspects of the technique rely on the type of membranes and extractants used. The membranes are hydrophobic with a pore size in the order of 0.1 um so that neither the juice nor the extractant enter the membrane pores and a thin gas layer (essentially air) is entrapped within the pores separating the two liquid phases. Water can pass through the gas membrane by diffusion in vapour state, non-volatile solutes, like salts or sugars, on the contrary are completely retained.

The driving force for water vapour transport is represented by the vapour pressure difference between the two membranes sides. Concentrated brines could be used as extractant, however corrosion and scaling, especially during the regeneration by evaporation, make the operation cumbersome. A more effective extraction mixture was found. A pilot plate and frame module was developed and tested. The module can concentrate non clarified orange juice above 60 Brix.

The technique is suitable to produce citrus juices with properties very close to the fresh squash at cost comparable with the cost of the conventional juice from concentrate. Many other applications are possible both in food processing and biotechnology for concentrating aqueous solutions containing heat sensitive products.

Fields of science (EuroSciVoc)

CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques.

• natural sciences › biological sciences › biochemistry › biomolecules › proteins › enzymes

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Programme(s)

• FP3-CRAFT - Specific programme of research and technological development in the field of industrial and materials technologies - CRAFT -, 1990-1994

Topic(s)

Data not available

Call for proposal

Data not available

Funding Scheme

CSC - Cost-sharing contracts

Coordinator

ITALIAN AGENCY FOR NEW TECHNOLOGY, ENERGY AND THE ENVIRONMENT

• EU contribution: No data
• Address: Via Anguillarese 301 ; 00060 CAPENA ; Italy
• Total cost: No data

Participants (1)

Fdt Depuratori d' Acqua

Italy

• EU contribution: No data
• Address: Viale Lombardia 299-301 ; 20047 Brugherio
• Total cost: No data