03098nas a2200409 4500 20260818085940.0 011298s1986 th r 000| 0eng d .b10185744 AIT Thesis no.EV-86-3 Lim, Siok Kek Degradation of organic matters in anaerobic sediments Bangkok : Asian Institute of Technology, 1986 87 p. Thesis ; no. EV-86-3 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering Thesis (M.Eng.) - Asian Institute of Technology The anaerobic metabolism of organic matters which include the process of fermentation, sulfate reduction and methane production were studied by using sediments from the polluted river. Samples were collected from the lower part of the Chao Phya river. Batch experiment was adopted for the study. Different types and quantities of substrates were introduced into the sediments. Also different quantities of sediments were used in order to examine whether sediment quantities would affect reaction mechanisms. The prepared samples were incubated at 30 °c in the dark. During the incubation period, various parameters such as carbohydrate , sulfate, TOA, etc. were analysed. The results showed that sulfate re- duction was predominant than methanogenesis in the presence of sulfate when acetate was used as the substrate. However, a significant low rate of methanogenesis can be detected in all sediments although rates of sulfate reduction were much higher. On the other hand, in anaerobic freshwater sediment where sulfate concentration was very low, methanogenesis was the major terminal process. The different doses of substrates addition gave the similar patterns of reaction mechanisms while decreased the quantities of sediment used from 30 g to 5 g with 60 ml of river water showed rather slower reaction with less sediment used. Sedimentation and deposition Hanaki, Keisuke, Chairperson Fude, I., Examination Committee Shin, Hang-Sik, Examination Committee Lee Foundation, Singapore, Scholarship Donor Asian Institute of Technology. Thesis ; no. EV-86-3 .b10185744 mnait x 230428 2 951012 m a x 0 mnait mnait mnarc 22 40 20 Barcode : 30050120804298 CREATED : 2014-03-28 RECORD # : i12782294 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050120224158 CREATED : 2016-09-05 RECORD # : i12972848 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050121074230 CREATED : 2023-04-04 RECORD # : i13441796 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 26330 26330 0 0 0 0 MAIN MAIN mnait 2026-08-18 50.00 0 AIT Thesis no.EV-86-3 30050120804298 2026-08-18 08:59:40 3 2026-08-18 22 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no.EV-86-3 30050120224158 2026-08-18 08:59:40 2026-08-18 40 0 0 0 0 MAIN MAIN mnait 2026-08-18 50.00 0 AIT Thesis no.EV-86-3 30050121074230 2026-08-18 08:59:40 1 2026-08-18 20