Effect of mixing and aeration on reactor temperature in aerobic thermophilic digestion process | |
| Author | Mishra, Manoj |
| Call Number | AIT RSPR no. EV-86-2 |
| Subject(s) | Water-supply--Nepal Information storage and retrieval systems--Water-supply |
| Note | A research study submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | This study was conducted to determine the effect of mixing and aeration on reactor temperature in Aerobic-Thermophilic Digestion Process. Experiments were conducted in a thermally insulated reactor of an effective volume of 15 liters. Synthetic waste having 15,000 mg/l COD was used as feed and high purity oxygen gas, along with ordinary air, was used for aeration. Contrary to the claim of earlier researchers, results of this study found contribution of heat by exothermic metabolism of aerobic micro organisms to be of relatively less importance than that by mechanical mixing. Dominating role of heat input by mixing over biogenic heat was firmly established when reactor temperature was maintained at 60.2oC without any biological activity inside the reactor. In accordance with the report's of most other researchers, aeration by high purity oxygen gas was observed to give a more stable process performance than the one due to aeration by ordinary air. COD remova1 data obtained in this study indicated that maximum COD reduction was obtained at 510C - 520C reactor temperature and 9 - 11 ppm concentration of D.O. in mixed liquor. |
| Year | 1986 |
| Type | Research Study Project Report (RSPR) |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Environmental Engineering and Management (EV) |
| Chairperson(s) | Orth, H.M. |
| Examination Committee(s) | Samorn Muttamara ;Shin, H.S |
| Scholarship Donor(s) | The Netherlands Government |
| Degree | Research Studies Project Report (M. Eng.) - Asian Institute of Technology, 1986 |