Process stability in anaerobic Digestion: Unveiling microbial signatures of full-scale reactor performance

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 497, P. 154962 - 154962

Published: Aug. 23, 2024

Language: Английский

---

Oxidative Stability of Virgin Avocado Oil Enriched with Avocado Leaves and Olive-Fruit-Processing By-Products (Leaves, Pomace) via Ultrasound-Assisted Maceration

Foods, Journal Year: 2025, Volume and Issue: 14(2), P. 294 - 294

Published: Jan. 17, 2025

Virgin avocado oil (VAO), treasured for its nutritional and sensory properties, is susceptible to oxidation. To improve oxidative stability, the feasibility of enrichment with antioxidants from or olive-processing by-products via ultrasound-assisted maceration was explored. Dried, milled (AL), olive leaves (OL), pomace (OP) were ultrasound-macerated laboratory-extracted VAO at 5, 10, 20% w/w levels. Induction-period (IP) values, determined Rancimat (110 °C, 20 L/h), increased by 1.1-1.6-fold. Maceration AL OL added pigments (β-carotene, lutein, α-chlorophyll, α-pheophytin) but only significantly boosted α-tocopherol levels (up 3.7-fold). Extraction major polar phenols (chlorogenic acid, oleuropein, hydroxytyrosol) poor (<42 mg/kg oil). Oleanolic maslinic acids, OP, reached up 650 260 mg/kg. The IP values correlated (r = 0.796, p 0.002) total phenol content. OP resulted in superior antioxidant activity, extending predicted shelf-life 14 22.3 months, reaching that a hydroxytyrosol-rich extra-virgin (24.9 months). GC-MS revealed dominance volatile acids OL- OP-VAOs, estragole AL-VAO highlighting some organoleptic safety challenges be considered, particularly when aiming exploit these materials enhancement stability VAOs sustain production.

Language: Английский

---

Feline Responses to Increasing Inclusion of Natural Olive Extract in Liquid or Dry Palatant Formulations Applied to Kibble Diets

Deleted Journal, Journal Year: 2025, Volume and Issue: 2(1), P. 13 - 13

Published: March 9, 2025

Olive extract (OE) has been used in human foods for its nutraceutical effects, making it a product of interest pet food. However, OE’s effect on palatability not examined. The study objective was to evaluate the dry cat with OE applied at differing inclusions within liquid or palatants. Twenty-seven volatile compounds were identified by gas chromatography–mass spectrometry potentially earthy fruit-like flavor profile. Liquid palatants formulated supply 0 (control), 15, 30, 50, 75, and 150 ppm OE, provide 0, 100, 200, 400, 600 when coated onto kibble. Palatability evaluated using two-day, two-bowl testing OE-containing versus control rations adult cats (n = 20) two-tailed t-tests determine if affected intake ratio (IR). observed IR 0.45 0.56. only preference 200 treatment (IR 0.56; p 0.01) while other different from (p ≥ 0.05). These findings indicate that palatant formulations can kibble diets up applications without negatively impacting food palatability.

Language: Английский

---

Industrial Two-Phase Olive Pomace Slurry-Derived Hydrochar Fuel for Energy Applications

Polymers, Journal Year: 2024, Volume and Issue: 16(11), P. 1529 - 1529

Published: May 29, 2024

The present study aims to resolve the existing research gaps on olive pomace (OP) hydrochars application as a fuel by evaluating its molecular structures (FTIR and solid NMR analysis), identifying influential characteristics (Pearson correlation process optimization (response surface methodology), slagging–fouling risks (empirical indices), combustion performance (TG-DSC analysis). response surfaces plot for hydrothermal carbonization (HTC) of OP slurry performed in pressure reactor under varied temperatures (180–250 °C) residence times (2–30 min) revealed 250 °C 30 min be optimal conditions producing hydrochar with higher heating value (32.20 MJ·Kg−1) energy densification ratio (1.40). However, terms efficiency cost-effectiveness, HTC highest yield 87.9% were 202.7 2.0 min. structure was mainly comprised aromatic rings methyl groups, alpha-C atoms esters, ether bond linkages lignin fractions. slagging fouling comparatively lower than those raw OP, indicated low indices. Pearson analysis emphasized that enrichment acid-insoluble extractive contents, carbon densification, reduced ash content main pivotal factors exhibit better biofuel applications.

Language: Английский

---