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...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Penerbit Universiti Kebangsaan Malaysia
2023
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| Online Access: | http://journalarticle.ukm.my/21540/ http://journalarticle.ukm.my/21540/1/S%2011.pdf |
| _version_ | 1848815376504193024 |
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| author | Nordin Sabli, Shamsainon Abu Toat, Yoshida, Hiroyuki Shamsul Izhar, |
| author_facet | Nordin Sabli, Shamsainon Abu Toat, Yoshida, Hiroyuki Shamsul Izhar, |
| author_sort | Nordin Sabli, |
| building | UKM Institutional Repository |
| collection | Online Access |
| 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. |
| first_indexed | 2025-11-15T00:49:00Z |
| format | Article |
| id | oai:generic.eprints.org:21540 |
| institution | Universiti Kebangasaan Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T00:49:00Z |
| publishDate | 2023 |
| publisher | Penerbit Universiti Kebangsaan Malaysia |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | oai:generic.eprints.org:215402023-05-10T06:23:54Z http://journalarticle.ukm.my/21540/ Hydrolysis of blended cotton/polyester fabric from hospital waste using subcritical water Nordin Sabli, Shamsainon Abu Toat, Yoshida, Hiroyuki Shamsul Izhar, 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 2023 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/21540/1/S%2011.pdf Nordin Sabli, and Shamsainon Abu Toat, and Yoshida, Hiroyuki and Shamsul Izhar, (2023) Hydrolysis of blended cotton/polyester fabric from hospital waste using subcritical water. Sains Malaysiana, 52 (1). pp. 139-151. ISSN 0126-6039 http://www.ukm.my/jsm/index.html |
| spellingShingle | Nordin Sabli, Shamsainon Abu Toat, Yoshida, Hiroyuki Shamsul Izhar, Hydrolysis of blended cotton/polyester fabric from hospital waste using subcritical water |
| title | 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_short | 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 |
| url | http://journalarticle.ukm.my/21540/ http://journalarticle.ukm.my/21540/ http://journalarticle.ukm.my/21540/1/S%2011.pdf |