| 000 | 04565nas a2200385 a 4500 | ||
|---|---|---|---|
| 005 | 20260818094844.0 | ||
| 008 | 260616s20269999th u ms t 000 eng d | ||
| 035 | _a.b12508317 | ||
| 099 | 9 | _aAIT Thesis no.EV-26-21 | |
| 100 | 1 | _aSuphanat Suwantep | |
| 245 | 1 | 0 |
_aEffect of aeration on methane release and oxidation in urban canals : _ba linear analysis |
| 260 |
_aPathum Thani, Thailand : _bAsian Institute of Technology, _c2026 |
||
| 300 |
_a89 leaves : _bill.+ _e1 online resource |
||
| 490 | 1 |
_aThesis ; _vno. EV-26-21 |
|
| 500 | _aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Environmental Engineering and Management | ||
| 502 | _aThesis (M. Eng.) - Asian Institute of Technology, 2026 | ||
| 520 | _aUrban canals are significant yet underrepresented sources of methane (CH₄), a potent greenhouse gas with a global warming potential 34 times greater than carbon dioxide over a 100-year horizon. These stagnant, shallow, and nutrient-rich water bodies create favorable conditions for anaerobic methanogenesis, but their mitigation potential through artificial aeration remains poorly understood. This study evaluated the effectiveness of venturi pump-induced aeration in reducing methane emissions from a stagnant urban canal at the Asian Institute of Technology (AIT) campus, Pathum Thani, Thailand, with a focus on spatial and temporal methane dynamics. Two experiments were conducted. First, a spatial experiment deployed floating chambers at distances of 1 to 5 meters from a continuously operating venturi pump over three weeks to assess methane flux gradients along the oxygen gradient. Second, a controlled temporal experiment using static chambers with manually introduced methane compared consumption rates between the aerated treatment canal and a non aerated control canal over 96 hours. Water quality parameters including NH₄⁺, NO₂⁻, NO₃⁻, and total organic carbon (TOC) were monitored, and dissolved oxygen was measured across spatial grids before and after aeration. In the spatial experiment, a directional decrease in methane flux was observed from 1 m (204.12 mg/m²/day) to 3 m (137.01 mg/m²/day) in the treatment canal, though the effect was not statistically significant (ANOVA, p > 0.05), likely due to spatially heterogeneous ebullition. Dissolved oxygen in the treatment canal reached 5.62{u2013}5.92 mg/L following aeration, representing a biologically meaningful increase from baseline levels. In the temporal experiment, the treatment canal exhibited a steeper rate of methane flux decline ({u2212}4,396.6 mg/m²/day²) compared to the control canal ({u2212}3,222.8 mg/m²/day²), indicating approximately 36% greater methane consumption potential under aeration. Spearman correlation analysis revealed a statistically significant negative relationship between methane flux and the change in NH₄⁺ (u = {u2212}0.52, p = 0.009), indicating competition between methanotrophic and nitrifying bacteria for the limited dissolved oxygen supplied by the pump.The findings demonstrate that venturi aeration activates the natural biological methane filter already present in urban canal systems, though a single small-scale unit provides insufficient oxygen to fully suppress emissions dominated by ebullition or to simultaneously optimize both methane oxidation and nitrogen cycling. This study contributes evidence for low-energy venturi aeration as a scalable, low-cost greenhouse gas mitigation strategy for stagnant urban waterways in tropical cities. | ||
| 650 | 0 |
_aMethane _xEnvironmental aspects |
|
| 700 | 1 |
_aCruz, Simon Guerrero, _eChairperson |
|
| 700 | 0 |
_aEkbordin Winijkul, _eExamination Committee |
|
| 700 | 1 |
_aGhimire, Anish, _eExamination Committee |
|
| 710 | 2 |
_aRoyal Thai Government Fellowship, _eScholarship Donor |
|
| 810 | 2 |
_aAsian Institute of Technology. _tThesis ; _vno. EV-26-21 |
|
| 856 | 4 | 0 |
_3Full-Text _uhttp://203.159.5.9/ait-thesis/detail.php?q=B24464 |
| 907 |
_a.b12508317 _bmnarc _ca |
||
| 902 | _a260622 | ||
| 998 |
_b0 _c260619 _dm _eh _fa _g0 |
||
| 945 | _lmnarc | ||
| 945 | _lmnarc | ||
| 942 | _c67 | ||
| 942 | _c40 | ||
| 909 |
_aBarcode : - _bCREATED : 2026-06-16 _cRECORD # : i13605574 _dLPATRON : 0 _eLCHKIN : - _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 0 _jTOT RENEW : 0 |
||
| 909 |
_aBarcode : 30050120420897 _bCREATED : 2026-06-17 _cRECORD # : i13606025 _dLPATRON : 0 _eLCHKIN : - _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 0 _jTOT RENEW : 0 |
||
| 999 |
_c34116 _d34116 |
||