Economizing the lignocellulosic hydrolysis process using heterologously expressed auxiliary enzymes feruloyl esterase D (CE1) and β-xylosidase (GH43) derived from thermophilic fungi Scytalidium thermophilum

Ethanol fermented from potato peels is proposed as one alternative source of renewable energy called bioethanol. In this research bioethanol was produced through four stages namely acid hydrolysis, detoxification, fermentation and distillation. The acid hydrolysis process was carried out using sulphuric acid at 100oC for 60 minutes. The detoxification process was carried out by adding NH4OH into the hydrolyzate prior to fermentation. Distillation was performed up to 100oC and the distillate with the BP of 78-84oC was determined for its ethanol content using gas chromatography. The ethanol produced from 5 grams of dried potato peels through fermentation for 4, 5, 6, and 7 days 3.54%; 4,85%; 5,35%; and 6.15% respectively.

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Optimization on The Hydrolysis Process of Cellulose from Corn Husk to Glucose with Activated Carbon Catalyst Sulfonated

Journal of Physics Conference Series ◽

10.1088/1742-6596/1858/1/012088 ◽

2021 ◽

Vol 1858 (1) ◽

pp. 012088

Author(s):

Didi Dwi Anggoro ◽

Luqman Buchori ◽

Mohamad Djaeni ◽

Ratnawati ◽

Diah Susetyo Retnowati ◽

...

Keyword(s):

Activated Carbon ◽

Carbon Catalyst ◽

Corn Husk ◽

Hydrolysis Process

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Enzymatic textile recycling – best practices and outlook

Waste Management & Research ◽

10.1177/0734242x211029167 ◽

2021 ◽

pp. 0734242X2110291

Author(s):

Benjamin Piribauer ◽

Andreas Bartl ◽

Wolfgang Ipsmiller

Keyword(s):

Enzymatic Hydrolysis ◽

Complete Removal ◽

The European Union ◽

Textile Processing ◽

Current State ◽

Industrial Implementation ◽

Hydrolysis Process ◽

Textile Recycling ◽

Textile Sector ◽

Suitable Process

Recently, textiles and their end-of-life management have become the focus of public and political attention. In the European Union the revised waste framework directive defines textiles as municipal waste and stipulates their separate collection by 2025. In the context of these developments, this paper summarises briefly the current state-of-the-art in textile recycling. It is evident that recycling methods are not yet fully developed. This is especially the case with multi-material textiles, which are composed of two or more polymers that are incompatible for recycling. In the practical part of the communication, results are presented which show that enzymatic hydrolysis is a suitable process for recycling textiles made of cotton and polyester. After a complete removal of cotton, the remaining pure polyester fibres undergo a re-granulation and post-condensation step. The so obtained recycled polyester is fed back into the textile processing chain and finally towels are obtained. The main steering parameters of the enzymatic hydrolysis process are described. The study proves that solutions in accordance with the Circular Economy in the textile sector are available but an industrial implementation has not yet been realised.

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