| Author | Anawat Pinisakul |
| Call Number | AIT Thesis no. EV-97-02 |
| Subject(s) | Sewage--Purification--Nitrogen removal
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of
Master of Science, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. EV-97-02 |
| Abstract | This study was conducted to determine the efficiency of nitrogen (N) removal by
vertical flow constructed wetlands treating septage. Two laboratory-scale and three pilotscale constructed wetland units were setup while two sand drying beds were used for data
comparison. Cattails (Typha latifolia), an emergent plant, were planted in these wetland
beds.
The maximum N removal range of 92-99% occurred at the septage loading rates of
80-125 kg TS/m2
.yr or 3.3-13 kg N/m
2
.yr. The sludge accumulation in the wetland beds was
found to result in better TKN removal and plant survival.
Based on the N mass balance, about 9-30% of the influent were found in the
percolate, 40-80% in the dried sludge, 0.01-0.16% by plant uptake, and the remaining
10-45% as adsorption, retention, volatilization and nitrification/denitrification.
There were several folds increase in N03-N in the percolate, indicating the
occurrence of nitrification reactions in the constructed wetland beds. Because there were
less VS or biomass present in the pilot-scale units, the extent of nitrification in the pilot-scale
constructed wetland beds was less than those of the lab-scale constructed wetland beds. |
| Year | 1997 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. EV-97-02 |
| 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) | Chongrak Polprasert ; |
| Examination Committee(s) | Visvanathan, C. ;Takizawa, S.; |
| Scholarship Donor(s) | Asian Institute of Technology Partial Scholarship ; |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1997 |