Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 63-72 |
| Number of pages | 10 |
| Journal | Journal of Hazardous Materials |
| Volume | 357 |
| DOIs | |
| Publication status | Published - 2018 Sep 5 |
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Keywords
- Biotoxicity assessment
- Land reclamation
- Leaching
- Sewage sludge ash
- Waste management
ASJC Scopus subject areas
- Environmental Engineering
- Environmental Chemistry
- Waste Management and Disposal
- Pollution
- Health, Toxicology and Mutagenesis
Cite this
Evaluation of sewage sludge incineration ash as a potential land reclamation material. / Lin, Wenlin Yvonne; Ng, Wei Cheng; Wong, Belinda Shu Ee; Teo, Serena Lay Ming; Sivananthan, Gayathiri d/o; Baeg, Gyeong Hun; Ok, Yong Sik; Wang, Chi Hwa.
In: Journal of Hazardous Materials, Vol. 357, 05.09.2018, p. 63-72.Research output: Contribution to journal › Article
}
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
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
UR - http://www.scopus.com/inward/record.url?scp=85048479414&partnerID=8YFLogxK
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
AN - SCOPUS:85048479414
VL - 357
SP - 63
EP - 72
JO - Journal of Hazardous Materials
JF - Journal of Hazardous Materials
SN - 0304-3894
ER -