| Author | Ntamukunzi, Eric |
| Call Number | AIT Thesis no.UWEM-14-02 |
| Subject(s) | Septic tanks--Thailand
|
| Note | 72 leaves : ill. |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. UWEM-14-02 |
| Abstract | The effluent from conventional septic systems has been a major issue and its discharge to the surround ing areas without any further treatment may be harmful for local people. The effluent quality can be improved by changing some environmental parameters like temperature. A Laboratory scale septic tank was used to check the temperature fluctuations effect on the performance; three Phases were operated at 40 0 C (1 st ), 35 - 40 0 C (2 nd ) and 35 - 50 0 C (3 rd ) for that purpose. The corresponding average COD removal efficiencies recorded are 81(8), 85(4), 77(6)%. The performance for BOD 5 removal was averaging 65(10), 75 (6), 69(3)% in the three Phases respectively; the total solids was at 60(9), 56(8), 54(10)% and VS at 72(7), 75(6), 69(8)% removal correspondingly. Soluble COD was not removed for the first Phase and in the other two Phases the removal didn’t exceed 20% . The biogas production increased for the second Phase with an average of 8mL/L/day and decreased at the 3 rd Phase to 3mL/L/day. The percentage methane produced was 50, 58 and 44% for 1 st , 2 nd and 3 rd Phases with the corresponding daily production of 2, 5, a nd 1mL/L/day. The VFA were detected at very low concentratio ns sometimes not even detected; a maximum of 15mg/L has been found during the second Phase. The E.Coli kill capacity was low at the second phase (the only analyzed) with around 5x10 2 MPN/100mL . Gen erally apart the temperature effect s on the biogas production, the performance was not severely affecte d; the fluctuating loading rates and the flow characteristics might be the possible reasons . |
| Year | 2014 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. UWEM-14-02 |
| Type | Thesis |
| School | School of Engineering and Technology |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Urban Water Engineering and Management (UWEM) |
| Chairperson(s) | Thammarat Koottatep;Hooijmans, Tineke |
| Examination Committee(s) | Annachhatre, Ajit P.;Sutat Weesakul |
| Scholarship Donor(s) | Bill and Melinda Gates Foundation (BMGF) and Dutch Development Cooperation - UNESCO - IHE Programmatic Cooperation (DUPC) |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology - UNESCO-IHE, 2014 |