03234nas|a2200397 i 4500 20260818144931.0 040430s2003 th u m rtt 00| a1eng d .b11923994 AIT Thesis no. EV-03-13 Shrestha, Minita Kinetics of the anaerobic sulfate reduction process Pathum Thani, Thailand : Asian Institute of Technology, 2003 85 leaves : ill. Thesis ; no. EV-03-13 Thesis (M.Sc.) - Asian Institute of Technology, 2003 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science. Approaches to mathematical modelling of anaerobic digestion and criteria for reactor design in anaerobic wastewater treatment are based on biological degradation kinetics. Whatever type of kinetics is used, the crucial problem always is reliable parameter estimation. Laboratory scales continuous stirred tank reactors (CSTR) were used to determine the kinetic parameters for methanogens and sulfidogens and to study the simultaneous sulfidogenesis and methanogenesis at different COD: So/- ratios. Kinetic parameters determined for each of these groups were bacterial yield, decay coefficient, maximum specific substrate utilization coefficient, and half-velocity constant and maximum specific growth rate. Results indicated that there are not many differences between estimated kinetic values for SRB and MB. It was found from the experiment that MB has very slightly higher Ks value than SRB which showed that MB outcompeted the SRB under nontoxic conditions in CSTR. In CSTR, sulfate removal of about 65% was achieved at COD: So/- ratio of 5:1. It was found from the study that SRB and MB had intense competition at COD: SO/- ratio of 5:1 for organic substrate. Further reduction in COD: SO/- ratio to 0.7:1, led to 100 % electron flow by SRB in the process. SRB and MB were inhibited by sulfide generation at 188mg L-1 and 80mg L-1 concentration respectively. On studying the effect of BESA on activity of methanogens it was found that lower pH (6.7-6.8) and BESA addition together has great influence on inhibition of methanogens without any effect to sulfidogens. Sulphates Anaerobic bacteria Annachhatre, Ajit P., Chairperson Preeda Pakpian, Examination Committee Satoh, Hiroyasu, Examination Committee Government of Denmark (DANIDA), Scholarship donor Asian Institute of Technology. Thesis ; no. EV-03-13 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B08223 .b11923994 mnait u 240417 0 040430 m a u 0 mnait mnarc 22 40 Barcode : 30050120706709 CREATED : 2014-04-02 RECORD # : i12755898 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050160051289 CREATED : 2016-05-25 RECORD # : i12990395 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 67235 67235 0 0 0 0 MAIN MAIN mnait 2026-08-18 50.00 0 AIT Thesis no. EV-03-13 30050120706709 2026-08-18 14:49:31 3 2026-08-18 22 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no. EV-03-13 30050160051289 2026-08-18 14:49:31 2026-08-18 40