1,720,980 research outputs found
Experimental MassTrasfer Coefficient for Water Purification Processes Based on Adsorption by Activated Carbon
No full textPotential Contribution of Woody By-products and Wastes to the Energy Balance of Mediterranean Regions
No full textA New High Yield Process for the Industrial Production of Carrot Juice
No full textA new carrot juice production process has been
developed to improve the yield of product to values higher
than 80%. This result was obtained by properly processing,
with consolidated technologies, both the liquid and the
solid streams coming from the decanter of a traditional
carrot juice industrial plant. In particular, the abovementioned
solid stream (waste of the decanter) was further
processed by using an aqueous washing stream consisting
of the endogenous vegetation water contained in the
processed carrots. This stream can be obtained, in the
required amount, in a reverse osmosis section which is fed
with the liquid stream coming from the decanter of a
traditional carrot juice production plant. A special feature
of the proposed process is that it uses an endogenous
washing vegetation water stream, thus avoiding any kind
of contamination of the final product. A detailed description
of the washing and the reverse osmosis section, the
values of the corresponding operating parameters, and
validation of the results obtained by calculation were
reported and discussed
Yield Improvement in the Production of Carrot Juice by a Reverse Osmosis based Washing Process
No full text
Renewable Energy Benefits with Conversion of Woody Residues to Pellets
No full textIn the frame of an Interreg IIIC Network-Operation named RegEnergy, that unites 18 partners from 11 countries of Europe, it was investigated the feasibility of using the woody by-products for heating purpose in a typical Mediterranean region. Focusing on the Abruzzo Region as representative sample area, it came out that a significant amount of the above mentioned renewable energetic material is annually available as a consequence of well consolidated and economically significant agro-industrial activities, forest maintenance and industrial wood production and transformation. In particular, it was found that the total amount of woody residues, as dry substance, are more than 700 kt/a, with 30% resulting from pruning activities related to the cultivation of about 360 km2 of vineyards and 450 km2 of olive-groves; these residues are concentrated in the hilly part of the region close to the Adriatic sea coast. Starting by this pleasant situation, the feasibility of a properly localised wood pellets production plant was supported by both the economic and energetic analysis. Additional suggestions related to optimal plant localization and to the best use of the woody pellets as substitute of natural gas for heating purposes were reported along with the positive impact of the whole action on the quality of the environment and on the recovery of soil fertility
Effect of Supercritical Carbon Dioxide on the Enzymes Inactivation in Single-Strength Carrot Juice
No full textThe inactivation of Pectin Methylesterase (PME), and Peroxidase (POD), in fresh single-strength carrot juice by supercritical carbon dioxide (SCCD) at 40 °C and a CO2/juice ratio (w/w) equal to 3 was investigated. In the range of pressure from 10 to 25 MPa and treatment time from 40 to 110 min, both PME and POD were effectively inactivated significantly. The laboratory inactivation tests were performed by using a semi continuous method with a continuous stream of CO2 fed at constant mass flow rate from the beginning to the end of each experimental test. A semi empirical kinetic model that accounts for a residual equilibrium fraction, , of POD and PME was used to describe satisfactorily the inactivation behavior. Under the above mentioned experimental conditions the pressure dependence of the kinetic constants, , can be described satisfactorily by a constitutive equation that is a linear function of the reduced pressure, , of carbon dioxide. The numerical values of the two model parameters, calculated by fitting the experimental data in terms of dimensionless residual activity measured at the end of each experimental tests are: 0.04035 min-1, 0.10720 for POD and 0.00345min-1, 0.08941 for PM
Cost-effective disposal of milk whey II: recovery and purification of lactose and pure water from the diafiltration permeate stream
No full text- …
