02769nam a2200385 4500 20260817162223.0 th eng .b11559172 AIT Thesis no.EV-96-32 Sakonwan Chanphaka Anaerobic acidogenesis of waste-activated sludge Bangkok : Asian Institute of Technology, 1996 70 leaves + 1 online resource Thesis ; no. EV-96-32 A thesis submitted in partial fulfillment of requirements for the degree of Master of Engineering Thesis (M.Eng.) - Asian Institute of Technology, 1996 The study of acidogenesis of waste activated sludge was carried out using 4-lab-scale complete mixing reactors in the batch operation. The objectives was to evaluate the performance of pretreatment by autoclave, the effects of sludge renewal ratio and batch operation time. The reactors were fed with autoclaved sludge at 20%, 30% and 40% renewal ratios and the control reactor was fed with raw sludge at 30% renewal ratio. The batch operations were carried out at 2-day, I-day and 0.5-day intervals. The results showed better degradation of autoclaved sludge and highest VF A production at 40% renewal ratio for each reaction time and 0.5-day reaction time for each renewal ratio. For each type of VFA produced, optimum acetic acid production was also found to be 40% renewal ratio at 0.5-day reaction time. Propionic acid production was found highest in 20% renewal for each reaction time and 2-day reaction time for each renewal ratio. But the production of isobutyric acid and butyric acid which were of minority could not be optimized because the concentrations produced did not differ much in each reactor. Sewage Purification Activated sludge process Yang, Byung-Soo, Chairperson Samorn Muttamara, Examination Committee Kamei, Tasuku, Examination committee Government of The United Kingdom, Scholarship donor Asian Institute of Technology. Thesis ; no. EV-96-32 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B14803 .b11559172 mnait v 240329 0 970107 m a v 0 mnait mnarc 22 40 Barcode : 30050120600993 CREATED : 2014-03-14 RECORD # : i12771703 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050160078712 CREATED : 2016-05-23 RECORD # : i12986033 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 4336 4336 0 0 0 0 MAIN MAIN mnait 2026-08-17 50.00 0 AIT Thesis no.EV-96-32 30050120600993 2026-08-17 16:22:23 3 2026-08-17 22 0 0 0 0 MAIN MAIN mnarc 2026-08-17 0 AIT Thesis no.EV-96-32 30050160078712 2026-08-17 16:22:23 2026-08-17 40