Production of Eco Bricks Using Tannery Sludge as a Partial Substitute for Clay
| dc.contributor.advisor | Abubeker, Yimam (PhD) | |
| dc.contributor.advisor | Lemma, Dendena (PhD) Co-Advisor | |
| dc.contributor.author | Haregewoin, Nida | |
| dc.date.accessioned | 2021-11-16T04:49:58Z | |
| dc.date.accessioned | 2023-11-10T14:54:40Z | |
| dc.date.available | 2021-11-16T04:49:58Z | |
| dc.date.available | 2023-11-10T14:54:40Z | |
| dc.date.issued | 2021-10 | |
| dc.description.abstract | Tannery sludge is an unavoidable by-product of waste water treatment plants of leather industries and with no safe disposal options; it has the potential to become a significant environmental burden for Ethiopia in the future. Presently, the sludge generated from the leather industries will be land filled without any kind of treatment. Because sludge contains a high concentration of organic and inorganic components, including heavy metals, its accumulation is a burden on the industry and has negative consequences for the environment and human health. As a result, an alternative sludge disposal strategy is required. The major goal of this research was to see if using TS with certain proportions in the manufacturing of bricks may be a viable alternative to natural clay. In laboratory-controlled conditions, clay bricks were made with various proportions of sludge (10%, 15%, 20%, and 25% by weight) with firing temperature of 800℃, 900℃ and 1000℃and its potential as a construction material was evaluated based on its Compressive strength, water absorption, weight loss on ignition, bulk density, firing shrinkage, electrical conductivity and heavy metal leaching properties. As a result, increasing the sludge content in bricks resulted in a decrease in compressive strength and increase in water absorption. When TS content was increased from 0% to 25%, the compressive strength of TS bricks decreased significantly, from 30.24 MPa to 20.15 MPa. Water absorption increased from7.03% to 16.03% when sludge proportion was increased from 0% to 25% at firing temperature of 1000°C. In addition, total shrinkage and weight loss in burning were compared to raw brick, revealing that total shrinkage did not differ significantly, while weight loss in burning varied from 12.25 % to 30.8 % in raw brick to 25% TS brick at firing temperature of 1000°C. Furthermore, the sludge altered up to a 15% mixing ratio demonstrates minimal heavy metal leachability as analyzed by TCLP and is compatible with the USEPA standard. As a result of the research, tannery sludge has the potential to be used in the production of sludge bricks with sludge proportion of 10% to 15% and firing temperature of 900°C to1000°C. | en_US |
| dc.identifier.uri | http://etd.aau.edu.et/handle/12345678/28674 | |
| dc.language.iso | en_US | en_US |
| dc.publisher | Addis Ababa University | en_US |
| dc.subject | Eco Bricks | en_US |
| dc.subject | Clay | en_US |
| dc.subject | Tannery Sludge | en_US |
| dc.title | Production of Eco Bricks Using Tannery Sludge as a Partial Substitute for Clay | en_US |
| dc.type | Thesis | en_US |