| 000 | 04657nas a2200481 a 4500 | ||
|---|---|---|---|
| 005 | 20260818090517.0 | ||
| 008 | 240306s20219999th u m tt 000 a eng d | ||
| 035 | _a.b12422514 | ||
| 099 | _aAIT Thesis no.EV-21-27 | ||
| 100 | 0 | _aLe Gia Ky | |
| 245 | 1 | 0 | _aDeveloping modified multi-soil layer-based constructed wetlands for the treatment of septic tank effluent |
| 260 |
_aPathum Thani, Thailand : _bAsian Institute of Technology, _c2021 |
||
| 300 |
_a69 leaves : _bill.+ _e1 online reource |
||
| 490 | 1 |
_aThesis ; _vno. EV-21-27 |
|
| 500 | _aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Environmental Engineering and Management, School of Environment, Resources and Development | ||
| 502 | _aThesis (M. Eng.) - Asian Institute of Technology, 2021 | ||
| 520 | _aWhile on-site treatments for black water was unable to have effluent quality that meet the standard discharge, constructed wetlands was considered as secondary treatment due to its advantages on operation cost and removal efficiency. Combining the multi-soil-layer system with constructed wetland would improve its performance in various aspects such as land area requirement, hydraulic retention time (HRT), etc. Moreover, another important advantage of multi-soil-layer system based constructed wetland (MSL-CW) is its flexibility. This research focused on developing two customized MSL-CWs to improve model{u2019}s performance on some specific parameter. In the first MSL-CW (reactor 2), iron slag was added in soil-mixed block (SMB) to have composition of lateritic soil (70%), sawdust (10 %), iron slag (10%) and charcoal (10 %). The main purpose of adding iron slag was improving Phosphorus removal. In second MSL-CW (reactor 3), SMB composition was Lateritic soil (70%), sawdust (15 %) and charcoal (15 %) but a 7cm soil layer was added on the top of reactor. The addition soil layer could enhance the microbial community on the surface of MSL-CW and plant growth potentially. The models were operated in 3 different retention time (36h, 24h and 12h). The results showed were high TSS removal rates of three reactors from the start (>99%) but still reactor 3 had slightly better efficient removal. Reactor 3 effluent also had the lowest concentration in both TCOD and SCOD at any HRT. Similar pattern was showed with BOD5 treatment, reactor 3 consistently had highest removal efficiencies. For TKN and NH3-N, Zeolite layer and its ion-exchange mechanism to remove ammonium ion made reactor 2 had the lowest concentration of all reactors regardless HRT. Moreover, a notable improvement in phosphorus removal in reactor 2 indicated that adding iron in SMB can promote phosphorus assimilation. One-way ANOVA results also confirmed the advantages of these modified MSL-CWs as the results showed the significant differences in all reaction rates at any HRT. Kinetic model validation test demonstrated that both TCOD and TKN removal follow first order kinetic in all three reactors while TP removal in reactor 2 and reactor 3 did not approach first order kinetic. | ||
| 650 | 0 | _aSeptic tanks | |
| 650 | 0 |
_aWetlands _xDesign and construction |
|
| 650 | 0 |
_aSewage _xPurification |
|
| 700 | 0 |
_aThammarat Kootattep, _eChairperson |
|
| 700 | 0 |
_aEkbordin Winijkul, _eExamination Committee |
|
| 700 | 0 |
_aTatchai Pussayanavin, _eExamination Committee |
|
| 710 | 2 |
_aAITCV Silver Anniversary Scholarships, _eScholarship Donor |
|
| 710 | 2 |
_aAIT Fellowship, _eScholarship Donor |
|
| 810 | 2 |
_aAsian Institute of Technology. _tThesis ; _vno. EV-21-27 |
|
| 856 | 4 | 0 |
_3Full-Text _uhttp://203.159.5.9/ait-thesis/detail.php?q=B20495 |
| 907 |
_a.b12422514 _bmnait _ca |
||
| 902 | _a250219 | ||
| 998 |
_b0 _c240330 _dm _ea _fa _g0 |
||
| 945 | _lmnarc | ||
| 945 | _lmnarc | ||
| 945 | _lmnait | ||
| 945 | _lmnait | ||
| 942 | _c40 | ||
| 942 | _c67 | ||
| 942 | _c20 | ||
| 909 |
_aBarcode : 30050121039506 _bCREATED : 2024-06-03 _cRECORD # : i13489549 _dLPATRON : 0 _eLCHKIN : - _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 0 _jTOT RENEW : 0 |
||
| 909 |
_aBarcode : - _bCREATED : 2024-06-03 _cRECORD # : i13489628 _dLPATRON : 0 _eLCHKIN : - _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 0 _jTOT RENEW : 0 |
||
| 909 |
_aBarcode : 30050120913487 _bCREATED : 2025-01-22 _cRECORD # : i13529201 _dLPATRON : 0 _eLCHKIN : - _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 0 _jTOT RENEW : 0 |
||
| 909 |
_aBarcode : 30050120913495 _bCREATED : 2025-01-22 _cRECORD # : i13529213 _dLPATRON : 0 _eLCHKIN : - _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 0 _jTOT RENEW : 0 |
||
| 999 |
_c28316 _d28316 |
||