03111nas a2200421 4500 20260818113506.0 011298s1986 th r 000| 0eng d .b10272987 AIT Thesis no.EV-86-6 Hsiao, Wen-ho Fate of nitrogen in polluted water bodies Bangkok : Asian Institute of Technology, 1986 53 p. Thesis ; no. EV-86-6 A research study submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development Thesis (M.Eng.) - Asian Institute of Technology, 1986 The activities of nitrogen transformation including nitrification, denitrification, ammonia release and ammonia adsorption were studied. River water and sediment at three different points on Chao Phraya River were collected and their bacteria activities were examined using batch experiments. Sediments can play an important role in ammonia transformation processes. Sediments contain much of the nitrification and denitrification bacteria and increase the rates significantly. Nitrifying activity decreased with increasing the pollution. Ammonia release from sediments reflects that sediments can keep large amount of ammonia. Ammonia adsorption by the suspended silt and by the sediments was not clearly shown. However, sediment may play important role in ammonia adsorption because sediments contain clay like zeolite and the release of ammonia from sediment was observed. Low ammonia content in Chao Phraya River, which receives Bangkok city domestic sewage and many factory discharges along the river with insuffi- cient treatment, can be due to high ammonia transformation activities. High nitrification and denitrification potentials decrease the ammonia concen- tration rather quickly after it was discharged. Water Nitrogen content Hanaki, K., Chairperson Fude, I., Examination Committee Samorn Muttamara, Examination Committee The Government of Republic of China, Scholarship Donor Asian Institute of Technology. Thesis ; no. EV-86-6 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B19628 .b10272987 mnait x 240401 2 951012 m a x 0 mnait mnait mnarc 22 40 20 Barcode : 30050120804280 CREATED : 2014-03-28 RECORD # : i12782348 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050120224125 CREATED : 2016-09-05 RECORD # : i12972873 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050121074214 CREATED : 2023-04-04 RECORD # : i13441930 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 43462 43462 0 0 0 0 MAIN MAIN mnait 2026-08-18 50.00 0 AIT Thesis no.EV-86-6 30050120804280 2026-08-18 11:35:06 3 2026-08-18 22 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no.EV-86-6 30050120224125 2026-08-18 11:35:06 2026-08-18 40 0 0 0 0 MAIN MAIN mnait 2026-08-18 50.00 0 AIT Thesis no.EV-86-6 30050121074214 2026-08-18 11:35:06 1 2026-08-18 20