Comparisons of iodine and chlorine as water disinfectants | |
| Author | Shimura, Yoshiaki |
| Call Number | AIT Thesis no. EV-87-7 |
| Subject(s) | Water--Purification--Chlorination Iodine |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | Iodine was compared with chlorine in terms of bacterial inactivation under normal conditions (pH 7 to 8, around 20°c). Coliform inactivation with iodine for Klong (canal) water well corresponded with the kinetics which was introduced by Selleck et al. (1978). Lag time (b) and velocity coefficient (-k) were larger in the case of iodine disinfection; therefore, inactivation with chlorine was more effective with the residual - contact time of less than 8:5 mg-min/L, while higher residual-contact time (more than 8.5 mg-min/L) favored iodine disinfection. In the case of filtered water, almost complete inactivation was achieved at 2 min contact time with chlorine dose of 1 to 4 mg/L. When contact time was increased to 10 min or dos e was increased to 8 mg/L, iodine exhibited the same inactivation effectiveness as chlorine. At the same time the storage stability and halogen demand of both halogens were compared. Iodine solution, as well as chlorine solution, was stable for up to 20 days. Iodine demand was equal to, or rather higher than chlorine demand for both Klong and filtered waters |
| Year | 1987 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Environmental Engineering and Management (EV) |
| Chairperson(s) | Samorn Muttamara |
| Examination Committee(s) | Hum, K.S. ; Vigneswaran, Saravanamuthu |
| Scholarship Donor(s) | Employer (Kawasaki Steel Corporation, Japan) |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1987 |