Osmostic microbial fuel cell (OSMFC) for activated sludge condensing and stabilization with bioelectricity generation | |
| Author | Aye Pyae Pyae Aung |
| Call Number | AIT Thesis no.EV-23-03 |
| Subject(s) | Microbial fuel cells Sludge disposal 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 |
| Abstract | An electrochemical device called a microbial fuel cell (MFC) employs to convert organic material into electrical energy using microorganisms. It was developed by applying it to treat diverse resources, including activated sludge and wastewater. This thesis investigated the efficiency of bioelectricity production, condensation, and activated sludge stabilization in comparison to two different MFCs using applied CEM of a traditional and FO membrane named by OsMFC technology. The unique technology FO membrane in MFC has not been explored regarding treating activated sludge. Within this study, OsMFC sought to produce bio-electricity while minimizing the surplus sludge produced by the activated sludge treatment. The average water flux was 2.7 ± 1.04 LMH in the OsMFC over the whole operation period. The OsMFC demonstrated superior performance compared to the MFC, achieving a sludge volume reduction of up to 68% and an average tCOD removal of 61.61 %. The feeding sludge in this study had 2.69%, 8% and 2.79% of the dry solid content in each run. The recommended conventional solid content for dewatering process were between 15 and 40 % of the overall solid concentration and the results from OsMFC showed that 16.95%,16.39% and 14.88% which met the standard. Then, the viscosity of the sludge increased with an increase in MLSS concentration, while the moisture content decreased. The EPS was found to play a crucial role in the sludge dewatering and thickening processes and increasing in polysaccharides also contributed to better water recovery and sludge thickening. The OsMFC generated an average voltage output 330 mV, 52% higher than the MFC and a maximum power density of 2.23 W/m3. Appling with the lower external resistors had a lower CE with higher COD removal. The study concludes that the OsMFC technology is a promising method for treating excess activated sludge while simultaneously producing bioelectricity. |
| Year | 2023 |
| 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 (EV) |
| Chairperson(s) | Xue, Wenchao |
| Examination Committee(s) | Cruz, Simon Guerrero;Anal, Anil Kumar |
| Scholarship Donor(s) | Thai Pipe Scholarship;Asian Institute of Technology Scholarships |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 2023 |