Modeling prediction of the process performance in a forward osmosis synergized microbial fuel cell | |
| Author | He, Yifan |
| Call Number | AIT Thesis no.EV-21-21 |
| Subject(s) | Osmosis Membranes (Biology) Microbial fuel cells Anaerobic infections--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 | Although osmotic microbial fuel cell (OsMFC) integrating forward osmosis (FO) with high quality water extraction from wastewater is widely investigated, the mechanisms of bioelectricity generation and organic removal is not well understood and mathematically expressed. Therefore, a mathematical model prediction on OsMFC performances was adopted. The developed and validated model was used to study the effect of operating parameters. The higher osmotic driving force created by higher draw solution concentration enhanced the voltage generation by about 9.2% in the OsMFC when having the water flux of 4.7 L·m-2 ·h-1 , which was favored by the combined effects of water-flux facilitated proton advection and the lowered internal resistance. Moreover, approximately 7.3% of voltage increment with 7-fold decrement of COD removal efficiency was achieved when anode HRT reduced from 8 to 1 h. The results of the investigation on the impact of HRT indicated that the water-flux-facilitated proton advection was regarded holding a lead position in determining the bioelectricity generation in spite of the lowered anolyte conductivity increased the internal resistance, and validated that the contact time of microorganisms with substrate impacted the COD removal. Varied anode influent COD impacted the COD removal efficiency via the organic loading changing, when anode influent organic concentration changed from 1 to 5 g·L-1 , COD removal efficiency showed an increase of approximately 3 times. At last, a scale-up OsMFC system was designed and the water flux favored energy generation let the system have a potential for converting to pressure retarded osmosis microbial fuel cell (PRO-MFC). |
| Year | 2021 |
| 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) | Xue, Wenchao; |
| Examination Committee(s) | Thammarat Koottatep;Visvanathan, Chettiyappan; |
| Scholarship Donor(s) | China Scholarship Council (CSC); |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 2021 |