Feasibility study of fluidizing bed with anaerobic granular sludge | |
| Author | Pama, Raquel P. |
| Call Number | AIT Thesis no. EV-95-32 |
| Subject(s) | Fluidized reactors Sewage--Purification |
| Note | A thesis submitted in partial fulfillment of the requirement for the degree of Master of Engineering. |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. EV-95-32 |
| Abstract | The feasibility study of fluidizing bed with anaerobic granular sludge was carried out on a semi-pilot scale modified Upflow Anaerobic Sludge Blanket Reactor of 4 m high, 20 cm diameter with a volumetric capacity of 140 liters. This research was intended to treat lowstrength AIT sewage. From the specific activity test, it was found that anaerobic granular sludge that had been stored for almost three years was still active, thus it could be used as a support media in the fluidbed process. Results show that without recycling the COD removal efficiency could be up to 85% at 4.69 kg COD/m3 .day of organic loading rate. At the same organic loading rate of 4.69 kg COD/m3 .day, upflow velocity of as high as 9 m/h with a recycling ratio of 2.62 could be applied while maintaining the COD removal efficiency of 88% at the hydraulic retention time of 1.3 hours. Particle size distribution test showed sludge granulation in the reactor. The weight fraction of the sludge retaining in the reactor increased with the decrease in hydraulic retention time and with the increase in organic loading rate. The low methane production may be due to the denitrification that took place in the reactor. Analysis on the nitrate concentration revealed that the sewage being studied has 9.3 mg/L nitrate in the raw sewage. This amount may be enough for the denitrification to take place in the reactor. The use of anaerobic granular sludge in the fluidization process provided a good environment for the interaction between the biomass and the incoming waste, thus inducing faster degradation rate of organic matter in the reactor. The present study confirms the feasibility of op.e rating F.l uidized Bed with anaerobic granular sludge as a support material for the growth of microorganisms. |
| Year | 1995 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. EV-95-32 |
| 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 and Management (EV) |
| Chairperson(s) | Yang, Byung-Soo |
| Examination Committee(s) | Visvanathan, C.;Stoll, Uwe |
| Scholarship Donor(s) | DANIDA |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 1995 |