Multi-objective optimization of drying conditions for the Olea europaea L. leaves with NSGA-II

VURAL N., YILMAZER HİTİT Z., ERTUNÇ S.

JOURNAL OF FOOD PROCESSING AND PRESERVATION, cilt.45, sa.7, 2021 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 45 Sayı: 7
  • Basım Tarihi: 2021
  • Doi Numarası: 10.1111/jfpp.15625
  • Dergi Adı: JOURNAL OF FOOD PROCESSING AND PRESERVATION
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aquatic Science & Fisheries Abstracts (ASFA), Biotechnology Research Abstracts, Business Source Elite, Business Source Premier, CAB Abstracts, Compendex, Food Science & Technology Abstracts, INSPEC, Veterinary Science Database
  • Ankara Üniversitesi Adresli: Evet

Özet

Phenolic compounds from olive leaves, which attract great attention with their high phenolic content and high antioxidant activity, need to be dried to increase the extraction efficiency before extraction. For this purpose, it is aimed to obtain optimal drying conditions of hot air inlet temperature (Tg), orifice inlet air flow rate (nu), drying time (t), and rehydration ratio (RR) for moisture removal of olive leaves. For this purpose, final moisture content (MC) and moisture loss (ML) were modeled and optimized by using soft computing methods. Pareto sets were obtained from predicted quadratic linear models using the least-squares (LS) approach. The nondominated sorting genetic algorithm-II (NSGA-II) was used for optimization. The compromise solution was obtained using the fuzzy c-means clustering algorithm (FCM) algorithm, one of the multicriteria decision-making methods. When the olive leaf is dried under optimum conditions determined by FCM (Tg = 63.84 degrees C, v = 1.700 m/s, t = 997 s, RR = 2.21%), the experimental values for total phenolic content (TPC) and oleuropein amount were (20.07 +/- 1.01) mg GAE/g dw and (7.30 +/- 0.71) mg/g dw, respectively. It was found that drying olive leaves under low airflow rate and low hot air input temperature resulted in less alteration of TPC and oleuropein amount.