| Author | Hsieh, Chi Nan |
| Call Number | AIT Thesis no. 465 |
| Subject(s) | Water--Purification--Biological treatment
Sewage--Purification--Biological treatment
|
| Note | A thesis submitted in partial fulfillment of the requirements
for the degree of Master of Engineering in the Asian Institute
of Technology, Bangkok, Thailand. |
| Publisher | Asian Institute of Technology |
| Abstract | Experimental biological disc filtration units incorporating
anaerobic digestion were very efficient under tropical conditions. The process unit had a cross section similar to that of an Imhoff tank with the modification that the sedimentation portion incorporated the series of rotating discs. The factors affecting the performance of the system such as detention time, disc areal COD loading, volumetric COD loading and disc rotational speed were studied in the outdoor environment using 6 laboratory scale units fed with Pepsi Cola bottling plant waste with COD ranging from 700-1800 mg/l. The results indicated that for treating Pepsi Cola waste ~ detention time of 5 hours with COD loading 6 kg/m3 day and disc areal COD loading
of 25 kg/1000 m2 day at a disc rotational speed of 10 rpm gave a COD removal 86.5% under tropical conditions. Disc areal COD loading and detention time were found significantly effect on the COD removal efficiency of the biological disc filter system. Disc rotational speed was found to be a main fact effect on
effluent dissolved oxygen level and suspended solids and total Kjeldahl nitrogen efficiency. An anaerobic compartment underneath the aerobic section effected a high degree of digestion of the biological solids sloughing off the discs. Some advantages of the process are:
1. ability to treat high concentration and nutrient deficient waste,
2. ability to absorb shock loadings,
3 . less land use than for an activated sludge plant , which might be very important in metropolitan areas where land is costly,
4. low capital cost, and
5. simplicity of operation which will not need skilled attention if a disc filtration plant is properly designed. |
| Year | 1972 |
| Type | Thesis |
| School | Student Research Before 1980 |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Thesis (Year <=1979) |
| Chairperson(s) | Pescod, M.B. |
| Examination Committee(s) | Frankel, Richard J. ; McGarry, M.G. |
| Scholarship Donor(s) | Government of the Republic of China |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 1972 |
