TY - JOUR
T1 - Evaluation of sewage sludge incineration ash as a potential land reclamation material
AU - Lin, Wenlin Yvonne
AU - Ng, Wei Cheng
AU - Wong, Belinda Shu Ee
AU - Teo, Serena Lay Ming
AU - Sivananthan, Gayathiri d/o
AU - Baeg, Gyeong Hun
AU - Ok, Yong Sik
AU - Wang, Chi Hwa
N1 - Funding Information:
This research programme is funded by the National Research Foundation (NRF) , Prime Minister’s Office, Singapore under its Campus for Research Excellence and Technological Enterprise (CREATE) programme with Grant Number R-706-001-101-281 , National University of Singapore. The authors also acknowledge the support of the National Research Foundation for research conducted at the St John’s Island National Marine Laboratory and Vincent Tang Boon Seng (ECO Special Waste Management Pte Ltd) for providing samples of sewage sludge incineration ash. The technical support by Dr. Zhiyi Yao on the analysis of incineration bottom ash sample is appreciated.
PY - 2018/9/5
Y1 - 2018/9/5
N2 - This study evaluated the potential of utilising sewage sludge incineration ash as a land reclamation material. Toxicity assessment of the leachate of the ash was carried out for both terrestrial and marine organisms. Both the fruit fly Drosophila melanogaster and barnacle Amphibalanus amphitrite showed that both bottom and fly ash leached at liquid-to-solid (L/S) ratio 5 did not substantially affect viabilities. The leachate carried out at L/S 10 was compared to the European Waste Acceptance Criteria and the sewage sludge ashes could be classified as non-hazardous waste. The geotechnical properties of the sewage sludge ash were studied and compared to sand, a conventional land reclamation material, for further evaluation of its potential as a land reclamation material. It was found from direct shear test that both bottom and fly ashes displayed similar and comparable shear strength to that of typical compacted sandy soil based on the range of internal friction angle obtained. However, the consolidation profile of bottom ash was significantly different from sand, while that of fly ash was more similar to sand. Our study showed that the sewage sludge ash has the potential to be used as a land reclamation material.
AB - This study evaluated the potential of utilising sewage sludge incineration ash as a land reclamation material. Toxicity assessment of the leachate of the ash was carried out for both terrestrial and marine organisms. Both the fruit fly Drosophila melanogaster and barnacle Amphibalanus amphitrite showed that both bottom and fly ash leached at liquid-to-solid (L/S) ratio 5 did not substantially affect viabilities. The leachate carried out at L/S 10 was compared to the European Waste Acceptance Criteria and the sewage sludge ashes could be classified as non-hazardous waste. The geotechnical properties of the sewage sludge ash were studied and compared to sand, a conventional land reclamation material, for further evaluation of its potential as a land reclamation material. It was found from direct shear test that both bottom and fly ashes displayed similar and comparable shear strength to that of typical compacted sandy soil based on the range of internal friction angle obtained. However, the consolidation profile of bottom ash was significantly different from sand, while that of fly ash was more similar to sand. Our study showed that the sewage sludge ash has the potential to be used as a land reclamation material.
KW - Biotoxicity assessment
KW - Land reclamation
KW - Leaching
KW - Sewage sludge ash
KW - Waste management
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UR - http://www.scopus.com/inward/citedby.url?scp=85048479414&partnerID=8YFLogxK
U2 - 10.1016/j.jhazmat.2018.05.047
DO - 10.1016/j.jhazmat.2018.05.047
M3 - Article
C2 - 29864689
AN - SCOPUS:85048479414
VL - 357
SP - 63
EP - 72
JO - Journal of Hazardous Materials
JF - Journal of Hazardous Materials
SN - 0304-3894
ER -