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Aloe sp. leaf gel and water glass for municipal wastewater sludge treatment and odour removal / Thameur Jaouadi, Mounir Hajji, Mariam Kasmi, Amjad Kallel, Abdelwaheb Chatti, Hichem Hamzaoui, Adel Mnif, Chedly Tizaoui, Ismail Trabelsi

Water Science and Technology, Volume: 81, Issue: 3, Pages: 479 - 490

Swansea University Author: Chedly Tizaoui

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DOI (Published version): 10.2166/wst.2020.123

Abstract

Aloe gel (Alg), which is a natural extract from the Aloe sp. plant, was evaluated in this study for its potential use as a bioflocculant to treat urban wastewater sewage sludge. The gel was used alone and combined with water glass (WG) under controlled conditions in laboratory experiments. Alg was f...

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Published in: Water Science and Technology
ISSN: 0273-1223 1996-9732
Published: IWA Publishing 2020
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URI: https://cronfa.swan.ac.uk/Record/cronfa54308
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spelling 2020-06-19T16:28:04.3830930 v2 54308 2020-05-26 Aloe sp. leaf gel and water glass for municipal wastewater sludge treatment and odour removal 4b34a0286d3c0b0b081518fa6987031d 0000-0003-2159-7881 Chedly Tizaoui Chedly Tizaoui true false 2020-05-26 CHEG Aloe gel (Alg), which is a natural extract from the Aloe sp. plant, was evaluated in this study for its potential use as a bioflocculant to treat urban wastewater sewage sludge. The gel was used alone and combined with water glass (WG) under controlled conditions in laboratory experiments. Alg was found effective to settle the flocculated sludge rapidly and remove distinctive unpleasant odours of the sludge as highlighted by gas chromatography-mass spectrometry (GC/MS) analysis. Furthermore, Alg was pH tolerant and had no effect in changing the pH of the wastewater. The optimum dose of Alg was 3% at which a sludge volume index (SVI) of 45.4 mL/g was obtained within 30 min settling time. To enhance the treatment performances of Alg, WG was also evaluated as an alkali agent to further reduce the chemical oxygen demand (COD) and ammonia (NH4-N) in the wastewater. At equal doses of 3% of WG and Alg each, the combined treatment outcomes showed high turbidity and NH4-N removals of 83 and 89%, respectively, but the overall COD removal was at best 25%. The settling rate of treated sludge with combined Alg/WG was very rapid giving an SVI of 25.4 mL/g within only 5 min. Journal Article Water Science and Technology 81 3 479 490 IWA Publishing 0273-1223 1996-9732 Aloe sp. gel, COD removal, odour removal, sewage sludge, turbidity, water glass 19 3 2020 2020-03-19 10.2166/wst.2020.123 COLLEGE NANME Chemical Engineering COLLEGE CODE CHEG Swansea University 2020-06-19T16:28:04.3830930 2020-05-26T10:04:23.2819640 Thameur Jaouadi 1 Mounir Hajji 2 Mariam Kasmi 3 Amjad Kallel 4 Abdelwaheb Chatti 5 Hichem Hamzaoui 6 Adel Mnif 7 Chedly Tizaoui 0000-0003-2159-7881 8 Ismail Trabelsi 9 54308__17549__9686e506463a44f4b04e45d4e042dd42.pdf 54308.pdf 2020-06-19T16:24:20.7182181 Output 1565190 application/pdf Accepted Manuscript true 2021-03-19T00:00:00.0000000 true eng
title Aloe sp. leaf gel and water glass for municipal wastewater sludge treatment and odour removal
spellingShingle Aloe sp. leaf gel and water glass for municipal wastewater sludge treatment and odour removal
Chedly, Tizaoui
title_short Aloe sp. leaf gel and water glass for municipal wastewater sludge treatment and odour removal
title_full Aloe sp. leaf gel and water glass for municipal wastewater sludge treatment and odour removal
title_fullStr Aloe sp. leaf gel and water glass for municipal wastewater sludge treatment and odour removal
title_full_unstemmed Aloe sp. leaf gel and water glass for municipal wastewater sludge treatment and odour removal
title_sort Aloe sp. leaf gel and water glass for municipal wastewater sludge treatment and odour removal
author_id_str_mv 4b34a0286d3c0b0b081518fa6987031d
author_id_fullname_str_mv 4b34a0286d3c0b0b081518fa6987031d_***_Chedly, Tizaoui
author Chedly, Tizaoui
author2 Thameur Jaouadi
Mounir Hajji
Mariam Kasmi
Amjad Kallel
Abdelwaheb Chatti
Hichem Hamzaoui
Adel Mnif
Chedly Tizaoui
Ismail Trabelsi
format Journal article
container_title Water Science and Technology
container_volume 81
container_issue 3
container_start_page 479
publishDate 2020
institution Swansea University
issn 0273-1223
1996-9732
doi_str_mv 10.2166/wst.2020.123
publisher IWA Publishing
document_store_str 1
active_str 0
description Aloe gel (Alg), which is a natural extract from the Aloe sp. plant, was evaluated in this study for its potential use as a bioflocculant to treat urban wastewater sewage sludge. The gel was used alone and combined with water glass (WG) under controlled conditions in laboratory experiments. Alg was found effective to settle the flocculated sludge rapidly and remove distinctive unpleasant odours of the sludge as highlighted by gas chromatography-mass spectrometry (GC/MS) analysis. Furthermore, Alg was pH tolerant and had no effect in changing the pH of the wastewater. The optimum dose of Alg was 3% at which a sludge volume index (SVI) of 45.4 mL/g was obtained within 30 min settling time. To enhance the treatment performances of Alg, WG was also evaluated as an alkali agent to further reduce the chemical oxygen demand (COD) and ammonia (NH4-N) in the wastewater. At equal doses of 3% of WG and Alg each, the combined treatment outcomes showed high turbidity and NH4-N removals of 83 and 89%, respectively, but the overall COD removal was at best 25%. The settling rate of treated sludge with combined Alg/WG was very rapid giving an SVI of 25.4 mL/g within only 5 min.
published_date 2020-03-19T04:16:42Z
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