Turbulent mixing effect on nitrogen transformation in sediment-water system of rivers | |
| Author | Shen, Jing |
| Call Number | AIT Thesis no. EV-88-22 |
| Subject(s) | Sediment transport River sediments |
| 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 |
| Abstract | A laboratory experiment was conducted on sediment collected from Chao
Phraya River. A continuous- flow laboratory scale reactor was designed to
simulate the river turbulent mixing condition in order to investigate the mixing
effect on nitrogen transformation in sediment-water system. Batch experiments
were carried out to study the effects of turbulent mixing on oxygen transfer.
This also included the relative potential of nitrogen transformation in
different depth of the sediment, and kinetics of nitrification/ denitrification in
overlying water.
Turbulent mixing showed obvious effect on nitrogen transformation in
sediment-water system, even in the low mixing condition (90 rpm). This enhanced
nitrification, but inhibited denitrification. The functional zone of sediment is
only about 4 cm deep. The presented nitrogen removal capacity of sediment is
about 5% of its potential which can be explored by mixing. Most of reactions
occurred in overlying water and sediment-water interface under mixing condition.
A regression equation was developed which indicated that K2 |
| Year | 1988 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Environmental Engineering and Management (EV) |
| Chairperson(s) | Yamamoto, K. |
| Examination Committee(s) | Samorn Muttamara ;Ahn, Kyu-Hong |
| Scholarship Donor(s) | Australian Government |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1988 |