An investigation of tapioca wastes | |
| Author | Jesuitas, Efren Penaranda |
| Call Number | AIT Thesis no. 136 |
| Subject(s) | Sewage--Purification--Biological treatment Salvage (Waste, etc.) |
| Note | A thesis submitted in partial fulfillment if the requirements for the degree of Master of Engineering in the SEATO Graduate School of Engineering, Bangkok, Thailand. |
| Publisher | Asian Institute of Technology |
| Abstract | The process for production of tapioca starch was reviewed and the sources of major wastewaters were located and sampled. Two main process wastes were identified as separator waste and washwater, and these were analyzed at different times for physical, chemical, and biochemical characteristics. Effects of such primary treatments as plain sedimentation, submerged filtration, and chemical coagulation were evaluated for separator waste. The feasibility of biological degradation of settled separator waste was studied and biochemical conditions and parameters such as oxygen uptake, nutrient deficiency, and reaction rate constants were determined. Investigations on washwater covered coagulation and sedimentation. The results obtained indicated that plain sedimentation was most applicable as primary treatment, and a sedimentation tank design is suggested to accommodate the range of waste characteristics encountered. Chemical coagulation was found to be uneconomical and unnecessary if secondary treatment was to be considered. Subsequent biological treat¬ ment for stabilization of the residual organic constituents of the waste was found to be feasible. Nitrogen and phosphorus supplementation, as well as pH adjustment of the settled waste were found to be beneficial precursors of biological treatment. Kinetic studies of biological treatment gave rate constant values comparable with those observed by other workers on different wastes, |
| Year | 1966 |
| Type | Thesis |
| School | Student Research Before 1979 |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Thesis (Year <=1979) |
| Chairperson(s) | Prof. M. B. Pescod; |
| Examination Committee(s) | Dr. R. T. Skrinde;Prof. A. Sorathesn;Dean Milton E. Bender, Jr.; |
| Degree | Thesis (M.Eng.) - SEATO Graduate School of Engineering |