03856nam a2200409 4500 20260818090024.0 011298s1998 th r 0000|0 eng d .b11734048 AIT Thesis no. EV-98-19 Krongtong Sripruitkait Denitrification of toxic nitrogenous wastewater Bangkok : Asian Institute of Technology, 1998 123 leaves Thesis ; no. EV-98-19 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 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. Sewage Purification Nitrogen removal Annachhatre, Ajit P., Chairperson Takizawa, Satoshi, Examination committee Eckhardt, Ing Heinz, Examination committee Asian Institute of Technology Partial Scholarship, Scholarship donor Asian Institute of Technology. Thesis ; no. EV-98-19 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B12739 .b11734048 mnait y 240407 0 981201 m a y 0 mnait mnait mnarc 20 40 Barcode : 30050120714331 CREATED : 1997-04-07 RECORD # : i12110334 LPATRON : 1024098 LCHKIN : 2014-06-23 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 10 TOT RENEW : 7 Barcode : 30050120714323 CREATED : 1997-04-07 RECORD # : i12110346 LPATRON : 1015361 LCHKIN : 2003-02-20 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 8 TOT RENEW : 5 Barcode : 30050160077920 CREATED : 2016-05-23 RECORD # : i1298775x LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 26594 26594 0 0 0 0 MAIN MAIN mnait 2026-08-18 0 AIT Thesis no. EV-98-19 30050120714331 2026-08-18 09:00:24 1 2026-08-18 20 0 0 0 0 MAIN MAIN mnait 2026-08-18 0 AIT Thesis no. EV-98-19 30050120714323 2026-08-18 09:00:24 2 2026-08-18 20 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no. EV-98-19 30050160077920 2026-08-18 09:00:24 2026-08-18 40