Acid hydrolysis optimization of pomegranate peels waste using response surface methodology for ethanol production View Full Text


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Article Info

DATE

2020-11-17

AUTHORS

Ayesha Saleem, Ali Hussain, Asma Chaudhary, Qurat-ul-Ain Ahmad, Mehwish Iqtedar, Arshad Javid, Afia Muhammad Akram

ABSTRACT

Agro-industrial wastes can be processed into valuable products. Successively, current investigation is an effort to optimize the acid hydrolysis of pomegranate peels waste (PPW) using central composite design (CCD) of response surface methodology (RSM) for ethanol production. Concentration of sulfuric acid, temperature, and time of hydrolysis were used as dependent variables, whereas reducing sugars, total carbohydrates, extractives, weight loss, hemicellulose, cellulose, and lignin contents were recorded as responses for PPW decomposition. The highest glucose level of 0.56 ± 0.04 mg mL−1 (with 5% acid concentration at 100 °C for 30 min) and carbohydrate contents of 1.53 ± 0.07 mg mL−1 (with 3% acid concentration at 75 °C for 45 min) were obtained. Subsequently, detoxification of hydrolysate was conducted employing 2.5% activated charcoal that reduced 62% of phenolic compounds. Detoxified hydrolysate was subjected to fermentation by ethanologenic yeasts: Metschnikowia sp. Y31, Metschnikowia cibodasensis Y34, and Saccharomyces cerevisiae K7 for 10 days experiment. Significant ethanol yield of 0.42 ± 0.08 g g−1 was noticed by Metschnikowia sp. Y31 on day 5 and 0.41 ± 0.07 g g−1 for Metschnikowia cibodasensis Y34 on day 2. The results demonstrated the hopeful prospect for bioethanologenesis using cellulosic wastes at marketable level.Graphical abstractStatement of noveltyThe focus of the current study was to develop low-cost ethanologenesis by using pomegranate peels waste. Initially, the biomass hydrolysis, being extremely a critical step, was optimized through central composite design using response surface methodology by Design Expert Software. The pretreated and detoxified biomass hydrolysate was then subjected to ethanol production via fermentative yeast. The low-cost ethanol production from wastes of pomegranate can be highly valuable not only for sustainable energy production but also for effective waste management. Significant yield of ethanol was achieved while using treated pomegranate peels waste as substrate. Our findings of the present study will be helpful in developing efficient and economical strategies tending to valorize cellulosic wastes. More... »

PAGES

1-12

References to SciGraph publications

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  • 2013-01-29. Effect of fermentation inhibitors in the presence and absence of activated charcoal on the growth of Saccharomyces cerevisiae in BIOPROCESS AND BIOSYSTEMS ENGINEERING
  • 2009-02. Ethanol production from olive cake biomass substrate in BIOTECHNOLOGY AND BIOPROCESS ENGINEERING
  • 2016-08-24. Valorization of Pomegranate Peels: A Biorefinery Approach in WASTE AND BIOMASS VALORIZATION
  • 2016-06-30. Conversion of apple pomace waste to ethanol at industrial relevant conditions in APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
  • 2016-03-28. Statistical Optimization of Saccharification of Alkali Pretreated Wheat Straw for Bioethanol Production in WASTE AND BIOMASS VALORIZATION
  • 1962-05. Über die quantitative Bestimmung von Lipoiden (Mikromethode) mittels der vielen natürlichen Lipoiden (allen bekannten Plasmalipoiden) gemeinsamen Sulfophosphovanillin-Reaktion in RESEARCH IN EXPERIMENTAL MEDICINE
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    21 schema:description Agro-industrial wastes can be processed into valuable products. Successively, current investigation is an effort to optimize the acid hydrolysis of pomegranate peels waste (PPW) using central composite design (CCD) of response surface methodology (RSM) for ethanol production. Concentration of sulfuric acid, temperature, and time of hydrolysis were used as dependent variables, whereas reducing sugars, total carbohydrates, extractives, weight loss, hemicellulose, cellulose, and lignin contents were recorded as responses for PPW decomposition. The highest glucose level of 0.56 ± 0.04 mg mL−1 (with 5% acid concentration at 100 °C for 30 min) and carbohydrate contents of 1.53 ± 0.07 mg mL−1 (with 3% acid concentration at 75 °C for 45 min) were obtained. Subsequently, detoxification of hydrolysate was conducted employing 2.5% activated charcoal that reduced 62% of phenolic compounds. Detoxified hydrolysate was subjected to fermentation by ethanologenic yeasts: Metschnikowia sp. Y31, Metschnikowia cibodasensis Y34, and Saccharomyces cerevisiae K7 for 10 days experiment. Significant ethanol yield of 0.42 ± 0.08 g g−1 was noticed by Metschnikowia sp. Y31 on day 5 and 0.41 ± 0.07 g g−1 for Metschnikowia cibodasensis Y34 on day 2. The results demonstrated the hopeful prospect for bioethanologenesis using cellulosic wastes at marketable level.Graphical abstractStatement of noveltyThe focus of the current study was to develop low-cost ethanologenesis by using pomegranate peels waste. Initially, the biomass hydrolysis, being extremely a critical step, was optimized through central composite design using response surface methodology by Design Expert Software. The pretreated and detoxified biomass hydrolysate was then subjected to ethanol production via fermentative yeast. The low-cost ethanol production from wastes of pomegranate can be highly valuable not only for sustainable energy production but also for effective waste management. Significant yield of ethanol was achieved while using treated pomegranate peels waste as substrate. Our findings of the present study will be helpful in developing efficient and economical strategies tending to valorize cellulosic wastes.
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    26 schema:keywords Design Expert software
    27 Expert software
    28 Graphical abstractStatement
    29 K7
    30 Metschnikowia cibodasensis Y34
    31 Metschnikowia sp
    32 PPW decomposition
    33 Saccharomyces
    34 Significant ethanol yield
    35 Y31
    36 Y34
    37 abstractStatement
    38 acid
    39 acid hydrolysis
    40 agro-industrial wastes
    41 bioethanologenesis
    42 biomass hydrolysates
    43 biomass hydrolysis
    44 carbohydrate content
    45 carbohydrates
    46 cellulosic wastes
    47 central composite design
    48 charcoal
    49 cibodasensis Y34
    50 composite design
    51 compounds
    52 concentration
    53 content
    54 critical step
    55 current investigation
    56 current study
    57 day 2
    58 day 5
    59 day experiment
    60 decomposition
    61 dependent variable
    62 design
    63 detoxification
    64 detoxification of hydrolysates
    65 detoxified biomass hydrolysate
    66 detoxified hydrolysate
    67 economical strategy
    68 effective waste management
    69 efforts
    70 energy production
    71 ethanol
    72 ethanol production
    73 ethanol yield
    74 ethanologenesis
    75 ethanologenic yeast
    76 experiments
    77 extractives
    78 fermentation
    79 fermentative yeasts
    80 findings
    81 focus
    82 glucose levels
    83 hemicellulose
    84 high glucose levels
    85 hopeful prospect
    86 hydrolysate
    87 hydrolysis
    88 hydrolysis optimization
    89 investigation
    90 levels
    91 lignin content
    92 loss
    93 low-cost ethanol production
    94 low-cost ethanologenesis
    95 management
    96 marketable level
    97 methodology
    98 noveltyThe focus
    99 optimization
    100 peel
    101 phenolic compounds
    102 pomegranate
    103 pomegranate peel
    104 present study
    105 production
    106 products
    107 prospects
    108 response
    109 response surface methodology
    110 results
    111 significant yield
    112 software
    113 sp
    114 step
    115 strategies
    116 study
    117 substrate
    118 sugars
    119 sulfuric acid
    120 surface methodology
    121 sustainable energy production
    122 temperature
    123 time
    124 time of hydrolysis
    125 total carbohydrates
    126 valuable products
    127 variables
    128 waste
    129 waste management
    130 wastes of pomegranate
    131 weight loss
    132 yeast
    133 yield
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