03608nas a2200409 a 4500 20260818170049.0 060918s2006 th uu|m rtt 0| a1eng d .b11993042 AIT Thesis no.EV-06-29 Pham Hoang Long Nitrogen removal from nitrogen : rich piggery wastewater by the process of nitritation- denitritation Pathum Thani, Thailand : Asian Institute of Technology, 2006 91 p. : ill. Thesis ; no. EV-06-29 A thesis 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, 2006 This study investigates the nitrogen removal performance of a two stage Upflow Floating Filter system (in series with recycle from aerobic stage to anoxic stage) for digested piggery waste based on nitritation-denitritation processes. The system was operated continuously for 120 days, without external carbon source for denitritation and without backwashing. As such, treatment of digested Piggery waste becomes possible with a maximum overall removal efficiency of 77% for Total Kjeldahl Nitrogen (TKN), 74% for ammonia nitrogen (NH3-N), and 60% for Total Nitrogen (TN), when running with influent concentration of 1346mg/L COD, 257mg/L TKN and 180mg/L NH3-N, with a total hydraulic retention time (HRT) l lh, dissolved oxygen (DO) concentration 1.0-1.5mg/L in aerobic stage, and recycle rate 1:1 from aerobic stage to anoxic stage. Fluorescence in situ hybridization (FISH) and Polymerase Chain Reaction (PCR) were performed to study the microbial community in anaerobic reactor. FISH analysis shown that the dominant microbial in anaerobic reactor were methanogens (Archae) - 16%, other microorganisms included bacteria: a- ,B- and y-proteobacteria which comprised 13, 5 and 14% of total bacteria, respectively. PCR analysis for the microbial community of the anaerobic reactor has shown that DGGE fingerprints of total bacterial 16S rDNA have significantly changed after one month (6th to 37th day) of operation. Between 68th day and 86th day samples suggests an insignificant shift or a relatively stable structure of the microbial community after 2-2.5 months of the UA3FF system operation Sewage Purification Nitrogen removal Shipin, Oleg V., Chairperson Annachhatre, Ajit P., Examination Committee Nguyen, Cong Thanh, Examination Committee Ministry of Education and Training, Vietnam, Scholarship donor Asian Institute of Technology. Thesis ; no. EV-06-29 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B10827 .b11993042 mnait u 240401 0 060918 m a u 0 mnait mnait mnarc 20 40 Barcode : 30050120747976 CREATED : 2005-04-21 RECORD # : i12496315 LPATRON : 1026039 LCHKIN : 2016-08-06 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 9 TOT RENEW : 8 Barcode : 30050120747943 CREATED : 2005-04-21 RECORD # : i12496327 LPATRON : 1020628 LCHKIN : 2007-04-28 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 3 TOT CHKOUT : 5 TOT RENEW : 5 Barcode : 30050160050141 CREATED : 2016-05-30 RECORD # : i13002831 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 81226 81226 0 0 0 0 MAIN MAIN mnait 2026-08-18 50.00 0 AIT Thesis no.EV-06-29 30050120747976 2026-08-18 17:00:49 1 2026-08-18 20 0 0 0 0 MAIN MAIN mnait 2026-08-18 50.00 0 AIT Thesis no.EV-06-29 30050120747943 2026-08-18 17:00:49 2 2026-08-18 20 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no.EV-06-29 30050160050141 2026-08-18 17:00:49 2026-08-18 40