Performance of electro-chemical (EC) disinfection in the treatment of septic tank effluent under plug flow condition | |
| Author | Santos, Jeronimo Dos |
| Call Number | AIT Thesis no.EV-18-38 |
| Subject(s) | Septic tanks--Environmental aspects Sanitation--Health aspects Wastewater--Treatment |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Environmental Engineering and Management |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. EV-18-38 |
| Abstract | This work investigates the performance of electrochemical disinfection system in treating effluent of septic tank . The electrolysis cells employed Ti/IrO 2 anodes and stainless steel cathodes. DC - power supply bench - scale were performed under 12 V using actual effluent of septic tank without adding chemical reagent. More than 70% removal in TSS, and greater than 50% of TCOD and SCOD reduction, while TKN and NH 3 - N were achieved within 1 - 4 hours with the removal efficiency ≤10%. Additionally, lowest energy consumption for organic pollutants removal were 4.41 mA/ cm 2, while highest energy requirement 4.86 mA/ cm 2. Meanwhile, operating cost per day were in range be tween 0.88 – 3.86 Bath /day and average energy use per capita per day 1.25 Bath /cap/d. Tracer study was an instrument to measure hydraulic characteristics such as mean residence time, dispersion index, short circuit, hydraulic efficiency (λ), and dead space. The NaCl was used as chemical tracer in this experiment which injected into the electrochemical tank by pulse injection. The effluent concentration of NaCl concentration were analyzed by plotting RTD curves. The mean residence time varied between 1- 2 hours using electricity current and without electricity current. Tracer experiment using electricity current provide less mean residence time. Short circuit were 0.33 which classified that there was no short circuit. Dead space value (0.072) illustrated high treatment performance. Hydraulic efficiency showed higher performance (0.65 – 0.80) which is known has a good efficiency. Lower dispersion number (0.001) achieved plug flow condition |
| Year | 2018 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. EV-18-38 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Energy and Climate Change (Former title: Department of Energy, Environment, and Climate Change (DEECC)) |
| Academic Program/FoS | Environmental Engineering and Management (EV) |
| Chairperson(s) | Thammarat Koottatep; |
| Examination Committee(s) | Xue, Wenchao;Chapagain, Saroj Kumar; |
| Scholarship Donor(s) | Ministry of Education of the Democratic Republic of Timor Leste; |
| Degree | Thesis (M. Sc.) - Asian Institute of Technology, 2018 |