Hydrolysis of cotton fabric from hospital waste for ethanol production using sub-critical water

Currently in Malaysia, most wastes are disposed into poorly managed systems with little or no pollution protection measures. Large amounts of wastes such as textiles are generated through hospitals and health care centers. However, the improper management of these abundantly generated wastes may...

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Main Author:	Abu Toat, Shamsainon
Format:	Thesis
Language:	English
Published:	2021
Subjects:	Ethanol Cotton fabrics Hydrolysis
Online Access:	http://psasir.upm.edu.my/id/eprint/93000/1/FK%202021%2089%20-%20IR.1.pdf
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id	my-upm-ir.93000
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spelling	my-upm-ir.930002022-10-18T04:45:58Z Hydrolysis of cotton fabric from hospital waste for ethanol production using sub-critical water 2021-06 Abu Toat, Shamsainon Currently in Malaysia, most wastes are disposed into poorly managed systems with little or no pollution protection measures. Large amounts of wastes such as textiles are generated through hospitals and health care centers. However, the improper management of these abundantly generated wastes may pose an environmental pollution problems and fire hazard. Cotton textile is a potential biomass for bioethanol production. Subcritical water (Sub-CW) hydrolysis was investigated as an alternative technology for the recycling of cotton textile waste for current health care waste management. The aim of this study is to investigate the possibility of complete conversion of cotton textile waste to ethanol via Sub- CW hydrolysis and fermentation. Sub-CW was carried out to facilitate the hydrolysis of cellulose component in cotton textile (cotton 75%+polyester 25%). The study was divided into two parts; (i) To evaluate the subcritical water parameters such as temperature and time to achieve maximum yield of sugars. (ii) Fermentation of the hydrolysate obtained from Sub-CW hydrolysis to ethanol. Under Sub-CW conditions of temperature (140 °C - 350 °C), reaction time (1-10 min) and water to cotton ratio (3:1) revealed that cotton textile treated at 280 °C for 4 min, was optimal for maximizing yield of sugar, which was 0.213 g/g-dry sample. The quantitative analysis by HPLC showed that the soluble carbohydrates in the water phase were mainly composed of glucose. The obtained glucose concentration, 702 mg/L was then fermented at 36 °C for 24 hours by Saccharomyces cerevisae (yeast) to ethanol. Maximum yield of ethanol production was 0.105 g/g glucose, which was 17.7% of theoretical yield. Hydrolysis with Sub-CW showed the potential to decompose the cotton textile into simple sugar while keeping sugar degradation to minimal phase and the possibility of complete conversion of cotton textile waste to ethanol via Sub-CW and fermentation. Ethanol Cotton fabrics Hydrolysis 2021-06 Thesis http://psasir.upm.edu.my/id/eprint/93000/ http://psasir.upm.edu.my/id/eprint/93000/1/FK%202021%2089%20-%20IR.1.pdf text en public masters Universiti Putra Malaysia Ethanol Cotton fabrics Hydrolysis Sabli, Nordin
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English
advisor	Sabli, Nordin
topic	Ethanol Cotton fabrics Hydrolysis
spellingShingle	Ethanol Cotton fabrics Hydrolysis Abu Toat, Shamsainon Hydrolysis of cotton fabric from hospital waste for ethanol production using sub-critical water
description	Currently in Malaysia, most wastes are disposed into poorly managed systems with little or no pollution protection measures. Large amounts of wastes such as textiles are generated through hospitals and health care centers. However, the improper management of these abundantly generated wastes may pose an environmental pollution problems and fire hazard. Cotton textile is a potential biomass for bioethanol production. Subcritical water (Sub-CW) hydrolysis was investigated as an alternative technology for the recycling of cotton textile waste for current health care waste management. The aim of this study is to investigate the possibility of complete conversion of cotton textile waste to ethanol via Sub- CW hydrolysis and fermentation. Sub-CW was carried out to facilitate the hydrolysis of cellulose component in cotton textile (cotton 75%+polyester 25%). The study was divided into two parts; (i) To evaluate the subcritical water parameters such as temperature and time to achieve maximum yield of sugars. (ii) Fermentation of the hydrolysate obtained from Sub-CW hydrolysis to ethanol. Under Sub-CW conditions of temperature (140 °C - 350 °C), reaction time (1-10 min) and water to cotton ratio (3:1) revealed that cotton textile treated at 280 °C for 4 min, was optimal for maximizing yield of sugar, which was 0.213 g/g-dry sample. The quantitative analysis by HPLC showed that the soluble carbohydrates in the water phase were mainly composed of glucose. The obtained glucose concentration, 702 mg/L was then fermented at 36 °C for 24 hours by Saccharomyces cerevisae (yeast) to ethanol. Maximum yield of ethanol production was 0.105 g/g glucose, which was 17.7% of theoretical yield. Hydrolysis with Sub-CW showed the potential to decompose the cotton textile into simple sugar while keeping sugar degradation to minimal phase and the possibility of complete conversion of cotton textile waste to ethanol via Sub-CW and fermentation.
format	Thesis
qualification_level	Master's degree
author	Abu Toat, Shamsainon
author_facet	Abu Toat, Shamsainon
author_sort	Abu Toat, Shamsainon
title	Hydrolysis of cotton fabric from hospital waste for ethanol production using sub-critical water
title_short	Hydrolysis of cotton fabric from hospital waste for ethanol production using sub-critical water
title_full	Hydrolysis of cotton fabric from hospital waste for ethanol production using sub-critical water
title_fullStr	Hydrolysis of cotton fabric from hospital waste for ethanol production using sub-critical water
title_full_unstemmed	Hydrolysis of cotton fabric from hospital waste for ethanol production using sub-critical water
title_sort	hydrolysis of cotton fabric from hospital waste for ethanol production using sub-critical water
granting_institution	Universiti Putra Malaysia
publishDate	2021
url	http://psasir.upm.edu.my/id/eprint/93000/1/FK%202021%2089%20-%20IR.1.pdf
_version_	1776100266187161600

Hydrolysis of cotton fabric from hospital waste for ethanol production using sub-critical water

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