Utilization of carbide sludge and urine for sustainable biocement production
Biocement is an emerging construction material via the microbially induced calcite precipitation (MICP) process for soil improvement, which could be produced using waste materials at ambient temperature. This paper investigates the possibility to produce sustainable biocement using industrial waste...
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sg-ntu-dr.10356-1621572022-10-06T05:00:20Z Utilization of carbide sludge and urine for sustainable biocement production Yang, Yang Chu, Jian Cheng, Liang Liu, Hanlong School of Civil and Environmental Engineering Engineering::Civil engineering Biocement Carbide Sludge Biocement is an emerging construction material via the microbially induced calcite precipitation (MICP) process for soil improvement, which could be produced using waste materials at ambient temperature. This paper investigates the possibility to produce sustainable biocement using industrial waste carbide sludge and urine. Urine was used as the growth medium for the cultivation of urease-producing bacteria (UPB). It was also used to provide urea to activate the MICP procedure together with the soluble calcium ions from carbide sludge and UPB to form calcium carbonate precipitation. The UPB produced in this way was urease active, capable of hydrolyzing urine-contained urea for calcium carbonate precipitation. The sand treated with biocement using the above ingredients achieved an unconfined compression strength of 1.2-1.7 MPa at 7.3-7.7% calcium carbonate content, whereas the permeability was reduced by two orders of magnitude. These results show the potential to use carbide sludge and urine for sustainable production of biocement. Nanyang Technological University We would like to acknowledge gratefully that the study reported in this paper was supported by the Center for Urban Solutions, Nanyang Technological University, Singapore, and partially supported by Jiangsu Distinguished Professor Program and Jiangsu Province “Six Talent Peak” program (XCL-111), Jiangsu Province, China and National Natural Science Foundation of China, China (Grant No. 52108300). 2022-10-06T05:00:19Z 2022-10-06T05:00:19Z 2022 Journal Article Yang, Y., Chu, J., Cheng, L. & Liu, H. (2022). Utilization of carbide sludge and urine for sustainable biocement production. Journal of Environmental Chemical Engineering, 10(3), 107443-. https://dx.doi.org/10.1016/j.jece.2022.107443 2213-3437 https://hdl.handle.net/10356/162157 10.1016/j.jece.2022.107443 2-s2.0-85125801514 3 10 107443 en Journal of Environmental Chemical Engineering © 2022 Elsevier Ltd. All rights reserved. |
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Engineering::Civil engineering Biocement Carbide Sludge Yang, Yang Chu, Jian Cheng, Liang Liu, Hanlong Utilization of carbide sludge and urine for sustainable biocement production |
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Biocement is an emerging construction material via the microbially induced calcite precipitation (MICP) process for soil improvement, which could be produced using waste materials at ambient temperature. This paper investigates the possibility to produce sustainable biocement using industrial waste carbide sludge and urine. Urine was used as the growth medium for the cultivation of urease-producing bacteria (UPB). It was also used to provide urea to activate the MICP procedure together with the soluble calcium ions from carbide sludge and UPB to form calcium carbonate precipitation. The UPB produced in this way was urease active, capable of hydrolyzing urine-contained urea for calcium carbonate precipitation. The sand treated with biocement using the above ingredients achieved an unconfined compression strength of 1.2-1.7 MPa at 7.3-7.7% calcium carbonate content, whereas the permeability was reduced by two orders of magnitude. These results show the potential to use carbide sludge and urine for sustainable production of biocement. |
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School of Civil and Environmental Engineering |
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School of Civil and Environmental Engineering Yang, Yang Chu, Jian Cheng, Liang Liu, Hanlong |
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Article |
author |
Yang, Yang Chu, Jian Cheng, Liang Liu, Hanlong |
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Yang, Yang |
title |
Utilization of carbide sludge and urine for sustainable biocement production |
title_short |
Utilization of carbide sludge and urine for sustainable biocement production |
title_full |
Utilization of carbide sludge and urine for sustainable biocement production |
title_fullStr |
Utilization of carbide sludge and urine for sustainable biocement production |
title_full_unstemmed |
Utilization of carbide sludge and urine for sustainable biocement production |
title_sort |
utilization of carbide sludge and urine for sustainable biocement production |
publishDate |
2022 |
url |
https://hdl.handle.net/10356/162157 |
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1746219668379533312 |