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AIR2-CT93-1023
Fermentative Utilization of Fruit and Vegetable Pomace and Biowaste for Production of Novel Types of Products |
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Contract No | AIR2-CT93-1023 |
| Total Cost | 1 175 013 | |
| EC Contribution | 832 013 | |
| Start Date | 01/01/1994 | |
| Duration | 36 months |
OBJECTIVE
The processing of fruit and vegetables for making juices and wines leads to large amounts of vegetable residues (pomace), which are landfilled or fed to animals. Biowaste, another type of residue is the biodegradable fraction of municipal household waste and is often collected separately.
The high crude fibre content of vegetable pomace suggests its utilization as a dietary fibre bread improver. An enrichment of different products with crude fibre compounds can raise the dietary fibre uptake of the population. Processing of the vegetable residues to a dietary fibre food additive can be done by lactic acid fermentation, leading to a transformation of low molecular materials and to a microbial stabilization.
Potato waste can be used as a substrate for the low-cost microbial production of enzymes like alpha-amylase, widely used in the food industry and the textile industry. After enzyme extraction, a pomace remains that can be used for the production of technical-grade lactic acid.
Grape waste can be used for the production of wine pip oil, colourings and grape flavour. All of the three processes can be performed in a much more efficient way if enzymatic treatment steps are involved. The remaining pomace can be processed to lactic acid. Bioresidue products with too low an overall quality cannot be upgraded to food grade products and will be used for low-cost production of lactic acid for use as a floc-forming supplement in wastewater treatment. Indeed, the loading capacity of a biological aerobic or anaerobic wastewater treatment system is essentially determined by the amount of active biomass retained in the reactor, which can be positively influenced upon by lactic acid. An open system fermentation is to be developed in which bioresidue products are used as substrates for low-cost lactic acid production. The effect of this feed-grade lactic acid on sludge settling properties in a number of different wastewaters and in the different reactor types used for wastewater purification is to be studied.
Contacts
Coordinator
EC Scientific Officer
Participant
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by CPL Press:
03/07/2007
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