Effect of operating parameters on nitrification of aniline in activated sludge process | |
| Author | Than Khin |
| Call Number | AIT Thesis no.EV-99-4 |
| Subject(s) | Sewage--Purification--Activated sludge process Nitrification |
| Note | A thesis submitted in partial fulfillment of the requirement for the degree of Master of Engineering, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | The effect of operating parameters on nitrification was investigated in Continuous Stirred Activated Sludge Process. Synthetic wastewater containing aniline was used as the carbon and nitrogen source for feed. Aniline degradation by heterotrophs and nitrification due to nitrifiers were investigated at aniline concentrations of 100, 250 and 400 mg/L. In each concentration, three hydraulic retention times of 16, 12 and 8 hrs were done. Then, in each hydraulic retention time, mean cell residence times of 24, 16 and 8 days were set up. The investigation was can-ied out under those conditions. Activated Sludge Process (ASP) operated at ambient temperature in as well as dissolved oxygen was controlled around 5 mg/L. The removal efficiencies of aniline by heterotrophs were observed to be 98-100% at all conditions and heterotrophic activity was virtually independent of influent concentration, hydraulic retention times and mean cell residence times. The nitrification rates which increased at influent aniline concentration of 100 and 250 mg/L but decreased at 400 mg/L in all conditions. Influent aniline concentration of 400 mg/L inhibited nitrifiers. The nitrification activity reduced substantially. Furthermore, Higher HRT and SRT are more chance to cause biodegradation and nitrification. Nitrification due to aniline in activated sludge process was mathematically modeled. Use of the model in unsteady state continuous activated sludge was illustrated through simulation. The model contains degradation of carbon and nitrification. |
| Year | 1999 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Energy and Climate Change (Former title: Department of Energy, Environment, and Climate Change (DEECC)) |
| Academic Program/FoS | Environmental Engineering (EV) |
| Chairperson(s) | Annachhatre, Ajit P.; |
| Examination Committee(s) | Dahl-Madsen, Karl Iver ;Ozaki, Hiroaki ; |
| Scholarship Donor(s) | Her Majesty Queen Sirikit of Thailand; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1999 |