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Hydrolysis of blended cotton/polyester fabric from hospital waste using subcritical 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 pos...

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Main Authors: Sabli, Nordin, Abu Toat, Shamsainon, Yoshida, Hiroyuki, Izhar, Shamsul
Format: Article
Published: Penerbit Universiti Kebangsaan Malaysia (UKM Press) 2023
Online Access:http://psasir.upm.edu.my/id/eprint/108227/
https://www.ukm.my/jsm/english_journals/vol52num1_2023/contentsVol52num1_2023.html
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spelling my.upm.eprints.1082272024-09-11T07:28:55Z http://psasir.upm.edu.my/id/eprint/108227/ Hydrolysis of blended cotton/polyester fabric from hospital waste using subcritical water Sabli, Nordin Abu Toat, Shamsainon Yoshida, Hiroyuki Izhar, Shamsul 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 was 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) showed 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, 171 mg/L was then fermented at 36 °C for 24 hours by Saccharomyces cerevisae (yeast) to ethanol. Highest yield of ethanol was 0.415 g/g glucose, which was 81.2 % 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. Penerbit Universiti Kebangsaan Malaysia (UKM Press) 2023 Article PeerReviewed Sabli, Nordin and Abu Toat, Shamsainon and Yoshida, Hiroyuki and Izhar, Shamsul (2023) Hydrolysis of blended cotton/polyester fabric from hospital waste using subcritical water. Sains Malaysiana, 52 (1). pp. 139-151. ISSN 0126-6039, ESSN: 2735-0118 https://www.ukm.my/jsm/english_journals/vol52num1_2023/contentsVol52num1_2023.html 10.17576/jsm-2023-5201-11
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
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 was 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) showed 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, 171 mg/L was then fermented at 36 °C for 24 hours by Saccharomyces cerevisae (yeast) to ethanol. Highest yield of ethanol was 0.415 g/g glucose, which was 81.2 % 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 Article
author Sabli, Nordin
Abu Toat, Shamsainon
Yoshida, Hiroyuki
Izhar, Shamsul
spellingShingle Sabli, Nordin
Abu Toat, Shamsainon
Yoshida, Hiroyuki
Izhar, Shamsul
Hydrolysis of blended cotton/polyester fabric from hospital waste using subcritical water
author_facet Sabli, Nordin
Abu Toat, Shamsainon
Yoshida, Hiroyuki
Izhar, Shamsul
author_sort Sabli, Nordin
title Hydrolysis of blended cotton/polyester fabric from hospital waste using subcritical water
title_short Hydrolysis of blended cotton/polyester fabric from hospital waste using subcritical water
title_full Hydrolysis of blended cotton/polyester fabric from hospital waste using subcritical water
title_fullStr Hydrolysis of blended cotton/polyester fabric from hospital waste using subcritical water
title_full_unstemmed Hydrolysis of blended cotton/polyester fabric from hospital waste using subcritical water
title_sort hydrolysis of blended cotton/polyester fabric from hospital waste using subcritical water
publisher Penerbit Universiti Kebangsaan Malaysia (UKM Press)
publishDate 2023
url http://psasir.upm.edu.my/id/eprint/108227/
https://www.ukm.my/jsm/english_journals/vol52num1_2023/contentsVol52num1_2023.html
_version_ 1811686010397917184
score 13.211869

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