| Author | Patcharee Chevapaiboon |
| Call Number | AIT Thesis no. 1402 |
| Subject(s) | Sewage--Purification--Activated sludge process
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering of the Asian Institute of Technology, Bangkok, Thailand |
| Publisher | Asian Institute of Technology |
| Abstract | The control strategies of the completely-mixed activated sludge process are evaluated in this study by considering the effect on effluent quality of fluctuating influent quality, mixed liquor suspended solids
concentration in aeration basin and in recycled sludge. The dynamic mathematical model, comprising of mass balances equations around the aeration basin and the sedimentation tank, was developed to predict the behaviour of the process with respect to time.
In the processes, the effect of measuring influent qualities as
BOD5 , COD, TOC and instantaneously are investigated. This gives an indication on the need for rapid analytical technique for process control.
Finally, the process with constant recirculation is also studied to compare those results Due to long transient or slow response of the system as a whole, rapid analytical technique has little effect on efficiency of the process provided results and adjustments are made within 4 hrs. Constant sludge recycle technique gives comparable results to variable recirculation if
adjustment is made to cover seasonal fluctuations. |
| Year | 1978 |
| Type | Thesis |
| School | Student Research Before 1979 |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Thesis (Year <=1979) |
| Chairperson(s) | Ouano, E.A.R. |
| Examination Committee(s) | Chongrak Polprasert ;Samorn Muttamara |
| Scholarship Donor(s) | Reader' s Digest |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1978 |