Organic Matter Removal to Reduce Disinfection By-products Precursors A Case study in “Legedadi Water Treatment Plant”
| dc.contributor.advisor | Kaba, Tassisa (PhD) | |
| dc.contributor.author | Kebede, Getahun | |
| dc.date.accessioned | 2018-07-27T11:09:48Z | |
| dc.date.accessioned | 2023-11-10T15:01:14Z | |
| dc.date.available | 2018-07-27T11:09:48Z | |
| dc.date.available | 2023-11-10T15:01:14Z | |
| dc.date.issued | 2014-07 | |
| dc.description.abstract | The main aim of this study was the use of enhanced coagulation method to reduce DBPs precursors from surfaces raw water source to control the formation of DBPs in drinking water. Jar test experiments were conducted to study the effectiveness of enhanced coagulation for removal of DBPs precursors from Legedadi reservoir, which is the major water supply to Addis Ababa Metropolitan the capital city of Ethiopia. In this study, for the removal of turbidity and organic matter polyelectrolyte, PACl, and alum were used. The performance of the three coagulants with varying dose level were assessed through treated water turbidity measurement and content of organic matter measured by surrogate parameters of total organic carbon value. These coagulants showed almost similar turbidity removal value. The results were indicated by TOC tested the optimum factorial combination of 1.75* optimum dose of PACl, which gave better resulting with optimum response values of 98.80 % organic matter removal efficiency, whereas Alum, and polyelectrolyte at 1.5*optimum dose showed optimum response value of 96.20, and 96.70 % organic matter removal efficiency respectively. The result showed that 84 % organic matter removal efficiency was obtained in conventional treatment, where as enhanced coagulation process showed an efficiency of 98.08 %. .Since organic matter is a large contributor in the formation of THMs, lower TOC values will likely indicate a lower potential for formation of disinfection by-products. This indicated that enhanced coagulation process is an effective means for removing organic matter present in drinking water if the coagulant dose and pH condition are adjusted to optimum condition. In general, TOC removal enhanced with increasing coagulant dose. However, further increases in coagulant dose beyond the optimal value had little negative effect on DBPs precursors’ removal Key words: Enhanced Coagulation, Organic Matter (DBPs Precursor), Total Organic Carbon, Organic Carbon Removal, Addis Ababa, Legedadi Water Treatment Plant, Ethiopia | en_US |
| dc.identifier.uri | http://etd.aau.edu.et/handle/12345678/10255 | |
| dc.language.iso | en | en_US |
| dc.publisher | Addis Ababa University | en_US |
| dc.subject | Enhanced Coagulation | en_US |
| dc.subject | Organic Matter (DBPs Precursor) | en_US |
| dc.subject | Total Organic Carbon | en_US |
| dc.subject | Organic Carbon Removal | en_US |
| dc.subject | Addis Ababa | en_US |
| dc.subject | Legedadi Water Treatment Plant | en_US |
| dc.subject | Ethiopia | en_US |
| dc.title | Organic Matter Removal to Reduce Disinfection By-products Precursors A Case study in “Legedadi Water Treatment Plant” | en_US |
| dc.type | Thesis | en_US |