TY  - BOOK
AU  - Krongtong Sripruitkait
AU  - Annachhatre,Ajit P.
AU  - Takizawa,Satoshi
AU  - Eckhardt,Ing Heinz
ED  - Asian Institute of Technology Partial Scholarship,
TI  - Denitrification of toxic nitrogenous wastewater
T2  - Thesis
PY  - 1998///
CY  - Bangkok
PB  - Asian Institute of Technology
KW  - Sewage
KW  - Purification
KW  - Nitrogen removal
N1  - A thesis submitted in partial fulfillment of the requirement for the degree of Master of  Engineering, School of Environment, Resources and Development; Thesis (M.Eng.) - Asian Institute of Technology, 1998
N2  - 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.
UR  - http://203.159.5.9/ait-thesis/detail.php?q=B12739
ER  -