| Author | Krongtong Sripruitkait |
| Call Number | AIT Thesis no. EV-98-19 |
| Subject(s) | Sewage--Purification--Nitrogen removal
|
| Note | A thesis submitted in partial fulfillment of the requirement for the degree of Master of
Engineering, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | Denitrification with using aniline as a carbon source was investigated in the upflow
denitrification reactor. Synthetic wastewater comprising of N03-N, aniline and nutrients was
used as feed. Investigations were carried out to ascertain the effect of upflow velocity, N03-N
load and N03-N concentration on denitrification rate with aniline as a carbon source. A 2.8 L
upflow denitrification reactor was operated at ambient temperature of about 28-32°C and
maintained ML VSS of about 10,000-11,000 mg/L.
The results obtained indicated that aniline could be successfully used as a carbon
source by denitrifiers. Aniline required for denitrification was estimated as 1.1
g aniline/g N03-N. The denitrification rates achieved were about 70 to 90 mg N03-N/L·d based
on volumetric load and were about 9 to 12 mg N03-N/g MLVSS·d based on sludge load. The
experiments also showed that denitrification rate is affected due to upflow velocity, influent
N03-N load and N03-N concentration.
At constant influent N03-N concentration of about 90-95 mg/L, upflow velocity
between 3 to 4 cm/hr was found to be optimum for achieving denitrification rate of about 90
mg N03-N/L·d based on volumetric load and about 12 mg N03-N/g MLVSS·d based on sludge
load. Increase in upflow velocity to 5 cm/hr resulted in reduced denitrification rate.
Maximum denitrification rate of about 90 mg N03-N/L'd based on volumetric load and
about 12 mg N03-N/g MLVSS·d based on sludge load was achieved for upflow velocity of 3
cm/hr at the N03-N loading of about 95 mg N03-N/L·d based on volumetric load and about 13
mg N03-N/g ML VSS·d based on sludge load.
At constant upflow velocity of 4 cm/hr, the maximum denitrification rate of about 85
mg N03-N/L·d based on volumetric load and about 12 mg N03-N/g MLVSS·d based on sludge
load were achieved at influent N03-N concentration between 70 to 90 mg/L. |
| Year | 1998 |
| 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) | Annachhatre, Ajit P.; |
| Examination Committee(s) | Takizawa, Satoshi ;Eckhardt, Ing Heinz; |
| Scholarship Donor(s) | Asian Institute of Technology Partial Scholarship; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1998 |