The Effect of Temperature, pH and SO2 on Ethanol Concentration and Sugar Consumption Rate (SCR) in Apple Wine Process

Bozoglu M. D., ERTUNÇ S., AKAY B., Bursali N., VURAL N., HAPOĞLU H., ...Daha Fazla

JOURNAL OF THE CHEMICAL SOCIETY OF PAKISTAN, cilt.37, sa.3, ss.431-439, 2015 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 37 Sayı: 3
  • Basım Tarihi: 2015
  • Dergi Adı: JOURNAL OF THE CHEMICAL SOCIETY OF PAKISTAN
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.431-439
  • Anahtar Kelimeler: Apple wine, Cider, Design of experiment, Statistical analysis, Ethanol, FERMENTATION TEMPERATURE, VOLATILE COMPOUNDS, ORGANIC-ACIDS, CIDER, GROWTH
  • Ankara Üniversitesi Adresli: Evet

Özet

The goal of this study was to examine the effects of operating parameters on ethanol concentration (ethanol) in apple wine production process. Examined parameters were temperature (T), pH and sulphurdioxide concentration (SO2). Experiments were planned and executed according to a full two-level factorial experimental design method. The studied levels were 18 degrees C and 25 degrees C for temperature, 3 and 4 for pH and 50 and 150 ppm for SO2. Ethanol concentration of apple wine for each set of experiments was determined by GC/MS. Experimental data were analyzed by using both graphical and quantitative Exploratory Data Analysis (EDA) Techniques. The main effect of each factor on sugar consumption rate (SCR) was also examined. The results show that the effect of examined operating parameters on ethanol was negative. High temperature level caused faster fermentation rate than the one caused by low temperature. Low level of pH and high level of SO2 inhibited the activities of both harmful microorganisms and wine yeast.