Optimization and Modelling of Process Conditions Using Response Surface Methodology (RSM) for Enzymatic Saccharification of Spent Tea Waste (STW)

Yücel, Yasin; Göycincik, Sezer

doi:10.1007/s12649-015-9395-y

Cited by 21 publications

(5 citation statements)

References 23 publications

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“…Tea is one of the most popular and inexpensive beverages in the world. According to FAO statistics, world tea production increased to about 568 million tons in 2018 [1]. China is the world's major producer and exporter of tea [2].…”

Section: Introductionmentioning

confidence: 99%

Effects of Fermented Tea Residue on Fattening Performance, Meat Quality, Digestive Performance, Serum Antioxidant Capacity, and Intestinal Morphology in Fatteners

Ding

Zhang

et al. 2020

Animals

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This study investigated the dietary supplementation of tea residue fermented by Bacillus subtilis, Aspergillus niger, and Saccharomyces cerevisiae, to explore its effects on growth performance, digestion performance, meat quality, serum antioxidant capacity, and intestinal morphology in pigs bred for rapid growth, also known as fatteners. One hundred and ninety-two healthy “Duroc × Landrace × Yorkshire” ternary hybrid pigs (body weight 70 ± 1.0 kg) were randomly divided into four groups according to the feeding test requirements, with four replicates in each group, and 12 fatteners per replicate. The control group (CG) was fed the basal diet. Treatments 1 (T1), 2 (T2), and 3 (T3), comprising ratios of 10%, 15%, and 20% of tea residue were added to the basal diet. The test period was 60 days. The results showed that supplementation of FTR in fatteners’ diets increased final body weight (FBW), average daily gain (ADG), and feed conversion ratio (FCR) in the T1 and T2 groups (p < 0.05). Compared with the other groups, the lightness (L*) and pH were significantly affected in the T2 group (p < 0.05). Compared with the CG, dietary supplementation of FTR significantly increased the nutrient digestibility of crude protein (CP), ether extract (EE), calcium (Ca), and phosphorus (P), improved the lipase and trypsin activities, and reduced drip loss and the shear force of fatteners (p < 0.05). Glutathione peroxidase (GSH-Px) and total antioxidant capacity (T-AOC) were significantly increased in the T2 and T3 groups compared with the other groups (p < 0.05). Supplementation of FTR in the jejunum significantly increased the villi height of the T2 group and the ratio of villi height to crypt depth of the FTR groups. Compared with the other two groups, the T2 and T3 groups significantly reduced the ratio of the villous height to crypt depth in the duodenum (p < 0.05). In conclusion, the tea residue after fermentation was shown to have beneficial effects on the fattening performance, digestion performance, meat quality, serum antioxidant capacity, and intestinal morphology of fatteners.

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Section: Introductionmentioning

confidence: 99%

Effects of Fermented Tea Residue on Fattening Performance, Meat Quality, Digestive Performance, Serum Antioxidant Capacity, and Intestinal Morphology in Fatteners

Ding

Zhang

et al. 2020

Animals

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“…The classification tree model had an accuracy of 80%, which indicated that 44 of the 55 cases were correctly classified. Based on all obtained results and models, it appeared that our reducing sugar yield was applicable and promising among the literature studies conducted to rapeseed straw (yield: 19 g/L) (Karagöz et al, 2012), palm spent tea waste (yield: 29 g/L) (Yücel and Göycıncık, 2015), reed (yield: 8 g/L) (Li et al, 2009) under varying pretreated conditions with varying enzymes.…”

Section: Classification and Regression Tree Analysis In Enzymatic Hydrolysis Of Sbpmentioning

confidence: 60%

“…But still, our knowledge is limited regarding the complete use of hydrolases and hereby, appropriate enzyme combinations to maximize the saccharification has not been achieved, yet. At this point, Response surface methodology (RSM) could be proposed as a statistical approach for design of experiments, model building, evaluation of factor effects, optimization of responses and for the reduction of the required number of experiments (Yücel and Göycıncık, 2015;Astray et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Investigation of Several Factors on Enzymatic Hydrolysis of Sugar Beet Pulp and Corn Cob: Statistical Analyses of the Experimental Results

Yurtseven

Erunsal

2021

Gıda

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In this work, sugar beet pulp (SBP) as a lignin poor biomass and corn cob (CC) as a lignin rich biomass were subjected to enzymatic hydrolysis to see the effects of various variables on reducing sugar yield. In SBP hydrolysis, response surface methodology (RSM) and ANOVA were used to fit sugar yield and to determine significance of the parameters (substrate, pectinase, cellulase and hydrolysis time). The proposed quadratic model gave an adequate approximation indicating the significance of all main effects and some of the interaction effects (p < 0.05). The maximum yields within the design space were found approximately as 87 g/L after 18 h of hydrolysis, using 300 µl Cellic Ctec3 and 300 µl Pectinex Ultra SP-L at %20 substrate loading. In CC hydrolysis, the use of nonionic surfactants (Tween 20 and Tween 80) under unpretreated conditions did not necessarily increase the yield of reducing sugar from untreated CC.

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“…The lack of fit of the model which is a vital criterion measuring the failure of the model for data representation was also found to be not significant (F value: 0.2797). A non-significant lack of fit is positive for the model and sufficient to estimate response in the presence of various variables (Yücel & Göycıncık 2015). Moreover, according to the model, all the criteria tested were found as significant (p<0.0001).…”

Section: Response Surface Methodologymentioning

confidence: 85%

Response surface methodology-based optimization studies about bioethanol production by Candida boidinii from pumpkin residues

Demiray,

Karatay,

Dönmez

2024

Biotech Studies

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For sustainable bioethanol production, the investigation of novel fermentative microorganisms and feedstocks is crucial. In this context, the goals of the current study are suggesting pumpkin residues as new raw material for bioethanol production and investigating the fermentative capacity of the Candida boidinii, which is a newly isolated yeast from sugar factory wastes. Response surface methodology was used to determine the effect of enzyme (cellulase and hemicellulase) concentration and enzymatic hydrolysis time. The maximum bioethanol concentration was 29.19 g/L when fermentation parameters were optimized. However, it is revealed that enzymatic hydrolysis and hydrolysis duration (48-72 h) have significant effects on reducing sugar concentration. The highest reducing sugar was 108.86 g/L when the 20% initial pumpkin residue was hydrolyzed at 37.5 FPU/g substrate cellulase and 37.5 U/mL hemicellulase at the end of 72 h. Under these optimized conditions, the bioethanol production of C. boidinii increased by 22.91% and reached 35.88 g/L. This study shows pumpkin residues are promising feedstocks and C. boidinii is a suitable microorganism for efficient bioethanol production.

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Optimization and Modelling of Process Conditions Using Response Surface Methodology (RSM) for Enzymatic Saccharification of Spent Tea Waste (STW)

Cited by 21 publications

References 23 publications

Effects of Fermented Tea Residue on Fattening Performance, Meat Quality, Digestive Performance, Serum Antioxidant Capacity, and Intestinal Morphology in Fatteners

Effects of Fermented Tea Residue on Fattening Performance, Meat Quality, Digestive Performance, Serum Antioxidant Capacity, and Intestinal Morphology in Fatteners

Investigation of Several Factors on Enzymatic Hydrolysis of Sugar Beet Pulp and Corn Cob: Statistical Analyses of the Experimental Results

Response surface methodology-based optimization studies about bioethanol production by Candida boidinii from pumpkin residues

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