Pomegranate peels waste hydrolyzate optimization by Response Surface Methodology for Bioethanol production

Abstract

Unwanted agricultural waste is largely comprised of lignocellulosic substrate which could be transformed into sugars. The production of bioethanol from garbage manifested an agreeable proposal towards waste management as well as energy causation. The goal of this work is to optimize parameters for generation of bioethanol through fermentation by different yeast strains while Saccharomyces cerevisiae used as standard strain. The low cost fermentable sugars from pomegranate peels waste (PPW) were obtained by hydrolysis with HNO 3 (1 to 5%). The optimum levels of hydrolysis time and temperature were elucidated via RSM (CCD) ranging from 30 to 60 min and 50 to 100 °C respectively. The result shows that optimum values (g/L) for reducing sugars was 61.45 ± 0.01 while for total carbohydrates was 236 ± 0.01. These values were found when PPW was hydrolyzed with 3% HNO 3 , at 75 °C for one hour. The hydrolyzates obtained from the dilute HNO 3 pretreated PPW yielded a maximum of 0.43 ± 0.04, 0.41 ± 0.03 g ethanol per g of reducing sugars by both Metchnikowia sp . Y31 and M. cibodasensis Y34 at day 7 of ethanologenic experiment. The current study exhibited that by fermentation of dilute HNO 3 hydrolyzates of PPW could develop copious amount of ethanol by optimized conditions.

Process characterization for tisane development using pomegranate waste: an herbal drink optimization strategy

“…The proximate composition of PPP and PSP has been given in Table 2. The moisture, protein, ash and fat content of PPP were observed to be as 12.26%, 3.08%, 3.56%, and 1.52%, respectively (Table 2) which was in proximity with the results obtained by Akhtar et al 6 The carbohydrate content of PPP was 79.05% which was consistent with the results of Chaudhary et al 26 claiming the total carbohydrate content of 79.6% in pomegranate peel. Carbohydrates are naturally occurring organic substances essential for the sustenance and nourishment of both plant and animal life, and they serve as fundamental raw materials in numerous industries.…”

Sustainable Biorefinery: Effect of Time Fermentation on Hidrolisis Product from Cocoa Pod Husk

“…The best production was produced by Saccharomyces cerevisiae, reaching 45.2 g of bioethanol per kg of cocoa pods [6]. Pretreatment with delignification and hydrolysis is required to convert cocoa pods into reducing sugars or glucose [29]. The resulting reduced sugar can be fermented into bioethanol [30].…”