4 research outputs found
The application of sheet filters in treatment of fruit brandy after cold stabilization
Considering the common use of sheet filtration for clarification of fruit
brandies, the aim of this study was to evaluate the influence of its
application on the stability and composition of volatile compounds of apricot
brandy after cold stabilisation. Cold stabilisation treatment involved
holding of the brandy at -1°C during 24 hours. Five depth filter sheets with
the nominal retention rate of 0.3 μm, 0.5-0.7 μm, 0.7-1.0 μm, 1.0-2.0 μm and
2.5-4.0 μm, were tested in the study. It was shown that all assessed filter
sheets were efficient in removing chill haze by significantly reducing the
content of fatty acid esters (primarily ethyl palmitate and ethyl laurate).
Other volatile and aromatic compounds were not significantly influenced by
the applied treatments. However, the filter sheets with higher nominal
retention rate (> 0.7 μm), had a smaller impact on the sensory
characteristics of the apricot brandy. The re-exposure to lower temperatures
did not lead to chill haze formation in any sample obtained after sheet
filtration. [Projekat Ministarstva nauke Republike Srbije, br. TR-31002
Thermo-Acid pretreatment of starch based kitchen waste for ethanol production
Recently, research on the alcoholic fermentation of kitchen waste has been accelerating for both ecological and economical reasons, primarily for ethanol use as renewable biofuel. Present work deals with the fermentative production of ethanol from different starch based kitchen waste. Kitchen waste from local students restaurant was separated by basic component as: peas, green beans, beans, rice, potato, wheat bread and corn. Thermo-acidic pretreatment of these raw materials was conducted by the addition of HCl up to pH of 1, and by autoclaving at 120 oC for 30 min. From the experimental result, maximum ethanol yield was obtained from wheat bread (0.11 g/g). The highest ethanol yield per starch of 0.36 g/g, which equals to 64% of the theoretical value, was obtained for peas. From the overall analysis, the examined thermo-acid pretreatment was the most efficient for hydrolysis of wheat bread, while it was least efficient for green beans. In order to enhance the efficiency of conversion of starch from kitchen waste into ethanol, pH lower than 1 is highly recommended. The results demonstrated the potential of different food waste as a promising biomass resource for the production of ethanol
Thermo-acid pretreatment of starch based kitchen waste for ethanol production
Recently, research on the alcoholic fermentation of kitchen waste has been accelerating for both ecological and economical reasons, primarily for ethanol use as renewable biofuel. Present work deals with the fermentative production of ethanol from different starch based kitchen waste. Kitchen waste from local students restaurant was separated by basic component as: peas, green beans, beans, rice, potato, wheat bread and corn. Thermo-acidic pretreatment of these raw materials was conducted by the addition of HCl up to pH of 1, and by autoclaving at 120oC for 30 min. From the experimental result, maximum ethanol yield was obtained from wheat bread (0.11 g/g). The highest ethanol yield per starch of 0.36 g/g, which equals to 64% of the theoretical value, was obtained for peas. From the overall analysis, the examined thermo-acid pretreatment was the most efficient for hydrolysis of wheat bread, while it was least efficient for green beans. In order to enhance the efficiency of conversion of starch from kitchen waste into ethanol, pH lower than 1 is highly recommended. The results demonstrated the potential of different food waste as a promising biomass resource for the production of ethanol
Removal of acridine orange dye from aqueous solution by adsorption onto dried sugar beet pulp
A simple, low cost, and effective method for the removal of acridine orange
(AO), a mutagenic cationic dye, from aqueous model solutions by adsorption
onto dried sugar beet pulp (SBP) was evaluated in the present study. The AO
removal was enhanced along with the increase of the initial solution pH and
dye concentration. It was found that the adsorption process closely follows a
pseudo-second-order chemisorption kinetics. The obtained equilibrium data
obey both the Freundlich and Langmuir isotherm models. The SBP was proved to
be very promising adsorbent for AO removal. Maximum adsorption capacity of
the Langmuir monolayer of SBP for AO was found to be 5.37, 34.6, 89.62,
144.53 and 324.58 mg/g, at 25°C for the solution pH of 2, 4, 5, 6, and 8,
respectively. [Project of the Serbian Ministry of Education, Science and
Technological Development, Grant no. TR-31002