02397nas a2200241 i 450000500170000000800410001703500150005810000240007324500600009726000520015730000230020949000320023250001180026450200510038252013710043365000430180470000370184770000400188470000480192470000480197271000710202081000640209120260818144926.0170699s1983    th  u m rtt   0|  a1eng d  a.b100325021 aHum, Ke-siong Eddie12aA kinetic design approach to multistage aerated lagoons  aBangkok :bAsian Institute of Technology,c1983  a159 leaves :bill.1 aDissertation ;vno. EV-83-1  aA dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Technical Science  aThesis (Ph.D.) - Asian Institute of Technology  aMultistage lagoons operated at dual-power level have many advantages  over a single system. Mathematical formulations which have been proposed  for the design of multistage aerated lagoons are empirical in nature and are  the representation of the overall performance of the system with no conside-  ration of the internal interactions which lead to the overall system beha-  viour.  In this study, a kinetic design approach which is based on established  mechanisms of substrate removal and growth was developed to represent the  steady state responses in multistage aerated lagoons. Data obtained from the  laboratory are presented to verify the validity of the proposed formulations.  The formulae presented here require the determination of nine parameter  values. The Newton-Raphson method coupled with sensitivity analysis was  used to optimize the values of the parameters. The dynamic nature of the  batch process with well defined initial conditions provided the data for the  identification of the parameters. The proposed formulations were also com-  pared with the well-known Monod model including endogeneous respiration  constant, kd. It was found that the proposed formulae gave a better des-  cription of substrate removal and growth. The proposed model was able to  explain quantitatively the three phases of growth of acclimated micro-  organisms. 10aCarbon monoxidexEnvironmental aspects1 aNguyen, Cong Thanh,eChairperson1 aOrth, H. M.,eExamination Committee0 aChongrak Polprasert,eExamination Committee1 aVongvisessomjai, S.,eExamination Committee2 aThe King's (Royal Thai Government) Scholarship,eScholarship Donor2 aAsian Institute of Technology.tDissertation ;vno. EV-83-1