| Author | Tapas, Arturo L. |
| Call Number | AIT Thesis no. EV-88-2 |
| Subject(s) | Water--Purification--Ozonization
Ozone
|
| Note | A thesis submitted in partial fulfilment of the requirement for the degree of Master of Engineering, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | Filtered (finished) water exhibits a considerable resistance to the buildup of ozone residual in a semi-batch ozonation. This is due to the rapid decomposition of ozone or high ozone demand at the start of ozonation. The Buildup of ozone residual after the breakthrough can be described by the formula
C= a(1 - e-bt) + Coe-bt
where C is the ozone residual at time t after the breakthrough,
Co is the ozone residual just before the breakthrough, a and b
are constants.
The bactericidal efficiency of ozone is little affected by
pH, ammonia, organic matter <glucose> and nitrite . With respect
to residual concentration, ozone is a more potent bactericide
than chlorine. Ozone is able to attain a 99. 9% kill (initial
number of coliforms 1061100 ml> in 12 min of contact time
(semi-batch disinfection> at a final residual of 0. 2 mg/l in
contrast to 1-4 mg/l initial residual and about 0. 5 mg/l final
residual of chlorine (batch disinfection, initial number of
coli forms 104>. Likewise, at the mentioned conditions, ozone
can attain a 100% kill in 15 min; whereas, chlorine can not,
even in 30 min of contact time. However, ozone has a serious
disadvantage of not being able to maintain a persistent
residual. |
| Year | 1988 |
| Type | Thesis |
| School | School of Environment, Resources, and Development |
| Department | Department of Energy and Climate Change (Former title: Department of Energy, Environment, and Climate Change (DEECC)) |
| Academic Program/FoS | Environmental Engineering and Management (EEM) |
| Chairperson(s) | Samorn Muttamara; |
| Examination Committee(s) | Vigneswaran, Saravanamuthu ;Yamamoto, K. ; |
| Scholarship Donor(s) | Federal Republic of Germany ; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1988 |
