| Author | Veera Vitayaudom |
| Call Number | AIT Thesis no. 189 |
| Subject(s) | Water quality management--Thailand, Northeastern
Water, Underground--Thailand, Northeastern
|
| Note | A thesis submitted in partial fulfillment of the requirements
for the degree of Master of Engineering in the SEATO Graduate School of Engineering, Bangkok, Thailand. |
| Publisher | Asian Institute of Technology |
| Abstract | A map showing concentration iron in ground waters
throughout Thailand has been developed from available data.
It was found that the problem of iron in ground water existed mainly in the Northeastern part of the country. Ferrous sulphate (FeSo4.7H2o) was added to natural groundwater taken from an artesian well near Bangkok for experimental studies in the laboratory. Preliminary
investigations were carried out using jar tests to determine
optimum pH and optimum dose of coagulant aid required for
effective iron removal before actual experiments with a
laboratory- scale iron removal unit were made. Sodium
hydroxide (NaoH) was used for pH adjustment and the coagulant aids used were polyelectrolytes of anionic, cationic and nonionic polymers.
A laboratory up flow solids scale unit was designed, based on the- contact clarification process, with total detention time of 3 hours. The results obtained indicated that short-circuiting of upflow through the sludge blanket caused floc to be carried over the effluent overflow weir. Use of anionic and nonionic polyelectrolytes resulted in larger and heavier floc formation with less carry-over at the effluent overflow weir and hence improved the efficiency of the unit |
| Year | 1967 |
| Type | Thesis |
| School | Student Research Before 1980 |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Thesis (Year <=1979) |
| Chairperson(s) | Surin Sethamanit |
| Examination Committee(s) | Skrinde, R.T. ; Pescod, M.B. |
| Degree | Thesis (M. Eng.) - SEATO Graduate School of Engineering, 1967 |
