Investigation on the production of bioethanol from black tea waste biomass in the seawater-based system

Indira, Dash; Das, Bhaskar; Bhawsar, Harshita; Moumita, Sahoo; Johnson, Eldin M.; Balasubramanian, P.; Jayabalan, R.

doi:10.1016/j.biteb.2018.11.003

Cited by 29 publications

(11 citation statements)

References 15 publications

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“…Enzymatic hydrolysis was performed using an enzyme cocktail from Novozyme, containing different carbohydrases. Z. bailii was reported to be a better medium, since it obtained 6-fold greater glucose yield than from the B. claussenii [ 110 ]. Sisal waste was investigated for bioethanol production, where enzymatic hydrolysis was performed using cellulase C1794, which resulted in 92% of glucose conversion [ 111 ].…”

Section: Enzymatic Hydrolysismentioning

confidence: 99%

Bioethanol Production by Enzymatic Hydrolysis from Different Lignocellulosic Sources

2021

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As the need for non-renewable sources such as fossil fuels has increased during the last few decades, the search for sustainable and renewable alternative sources has gained growing interest. Enzymatic hydrolysis in bioethanol production presents an important step, where sugars that are fermented are obtained in the final fermentation process. In the process of enzymatic hydrolysis, more and more new effective enzymes are being researched to ensure a more cost-effective process. There are many different enzyme strategies implemented in hydrolysis protocols, where different lignocellulosic biomass, such as wood feedstocks, different agricultural wastes, and marine algae are being used as substrates for an efficient bioethanol production. This review investigates the very recent enzymatic hydrolysis pathways in bioethanol production from lignocellulosic biomass.

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Section: Enzymatic Hydrolysismentioning

confidence: 99%

Bioethanol Production by Enzymatic Hydrolysis from Different Lignocellulosic Sources

2021

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“…erefore, the usage of waste materials should be explored. Tea has been recognized as the second most commonly consumed beverage in the world, and the annual output of tea is estimated more than 4 million tons [16,17]. In China, it is undoubt that a huge amount of wasted tea was produced during production or consumption, leading to the serious environmental problem.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Dye by Waste Black Tea Powder: Parameters, Kinetic, Equilibrium, and Thermodynamic Studies

Lin

et al. 2020

Journal of Chemistry

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Waste black tea powder was used as a potential adsorbent to remove methylene blue (MB) from aqueous solution. Several operating factors in adsorption of MB onto waste black tea powder were investigated, including contact time, initial MB concentration, solution pH, adsorption temperature, and dosage of waste black tea powder. Experimental results revealed that the adsorption efficiency increased with contact time and solution pH values and decreased with initial MB concentration and adsorption temperature. The equilibrium time was estimated to be around 60 min. The maximum adsorption capacity and the highest adsorption efficiency were 302.63 mg·g−1 and 100%, respectively. In kinetic study, pseudo-first-order and pseudo-second-order kinetic models, intraparticle diffusion model, and Boyd and Elovich models were employed to analyze the adsorption behavior and the adsorption mechanism. It was found that the pseudo-second-order kinetic model was suitable to describe the adsorption process, and the calculated equilibrium adsorption capacity was well close to the experimental data for different initial MB concentrations. The internal diffusion was not the only rate-controlling step, and the existence of boundary effect was observed in this study. From isotherm analysis, the equilibrium data were well represented by the Langmuir model, rather than Freundlich, Dubinin–Redushckevich, or Temkin models. The nonlinear fitting for various isotherm models implied that the adsorption behavior between MB and waste black tea powder was complication. Thermodynamic parameters including changes in Gibb’s free energy, enthalpy, and entropy suggested that adsorption of MB onto waste black tea powder was a spontaneous and exothermic process. The multiple regeneration/adsorption experiments indicated that the used black tea powder efficiently remained more than 75% after five cycles using NaOH as a regenerative reagent and thus be used for many times. Therefore, as a low-cost and easily available material, waste black tea powder could be applied in wastewater treatment.

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“…Thousands of tons of BT waste are generated and disposed of in tea shops, restaurants, and houses every day. This issue does not stop with the waste generated after consumption and from the production process, and BT wastes are often disposed of in surrounding water bodies (Mohammed, 2012 ; Memić et al, 2014 ; Malakahmad et al, 2016 ; Indira et al, 2018 ; Hussain et al, 2018 ). In 2016, worldwide tea production was 5.73 million tons, with BT accounting for most of the overall tea production (65%) (Gao et al, 2021 ).…”

Section: Black Tea and Water Hyacinthmentioning

confidence: 99%

“…In Turkey about 30,000 t of tea factory wastes are disposed of annually in the small bays near the Black Sea; in Malaysia, about 100,000 t are generated annually through the withering production process; and in India, 190,000 t of tea factory wastes are produced annually from the production of approximately 857,000 t of tea (Hussain et al, 2018 ). Thus, a large volume of spent tea leaves or tea leaf residue is discharged into the environment within daily tea consumption, including ready-to-drink fast teas (Mohammed, 2012 ; Memić et al, 2014 ; Malakahmad et al, 2016 ; Indira et al, 2018 ; Hussain et al, 2018 ). The two most widespread tea types (green and black) are differentiated based on the degree of fermentation.…”

Section: Black Tea and Water Hyacinthmentioning

confidence: 99%

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Ecofriendly remediation technologies for wastewater contaminated with heavy metals with special focus on using water hyacinth and black tea wastes: a review

Elbasiouny

Darwesh

Elbeltagy

et al. 2021

Environ Monit Assess

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Treatment of water contaminated with heavy metals is challenging. Heavy metals are non-degradable, persistent in the environment, have a high dispersion capacity by water, can bioaccumulate, and represent risks to human and environmental health. Conventional treatment methods have disadvantages; however, adsorption in biomass is a highly promising method with high efficiency and low cost that avoids many of the disadvantages of conventional methods. Black tea (BT) wastes and water hyacinth (WH) have attracted attention for their ability to remove heavy metals from wastewater. Utilizing these approaches can remove contaminants and effectively manage problematic invasive species and wastes. The conventional uses of BT and WH were efficient for removing heavy metals from wastewater. Due to the unique and distinct properties and advantages of biochar and nano-forms of biosorbents, the use of BT and WH in these forms is promising to achieve sustainable heavy metals removal from wastewater. However, more study is needed to confirm preliminary results.

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Investigation on the production of bioethanol from black tea waste biomass in the seawater-based system

Cited by 29 publications

References 15 publications

Bioethanol Production by Enzymatic Hydrolysis from Different Lignocellulosic Sources

Bioethanol Production by Enzymatic Hydrolysis from Different Lignocellulosic Sources

Adsorption of Dye by Waste Black Tea Powder: Parameters, Kinetic, Equilibrium, and Thermodynamic Studies

Ecofriendly remediation technologies for wastewater contaminated with heavy metals with special focus on using water hyacinth and black tea wastes: a review

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