| Author | Sin Khanndarith |
| Call Number | AIT Thesis no.EV-10-17 |
| Subject(s) | Water--Purification--Membrane filtration
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Environmental Engineering and Management |
| Publisher | Asian Institute of Technology |
| Abstract | Unclean water causes people ill and die. Contaminants, especially pathogens such as protozoa, bacteria and virus strongly affect to human health. Water is needed to be free from those contaminants. Treatment is really needed to overcome such a problem. Nowadays, ceramic microfiltration is very attractive solution over the convention water treatment process. Regarding the mechanism of coagulation and flocculation, the ceramic microfiltration can be enhanced. In this study, hybrid CMF system was conducted to investigate the removal efficiency of hybrid CMF system and to compare between the performance of hybrid CMF system and conventional water treatment. Coagulation-flocculation was a pre-treatment process to enhance the CMF. PACl was used as coagulant. Disinfectant was not applied. Feed water from Khlong prapa canal was continuously supplied. It was found that optimum PACl dose for the system was similar to the dose from Jar Test. CMF Filtrate quality showed better results than conventional water treatment. This system could remove 99.4 % of turbidity. TOC, DOC and UV254 were removed 41.5, 29.3, and 41.1 % respectively. No any detection of total coliform, E-coli, and micro-particle (5 – 15 μm) were found in the filtrate from the system. Over 6 log of spiked coliphage was removed by the system. Moreover, the system had lower chemical cost than conventional system. Alum, pre and post Cl2 were the reasons of high chemical cost for the conventional system. Furthermore, this system provided higher water recovery than the conventional system. 3.5 h filtration cycle gave 98.2 % highest water recovery when the lowest was 96.8 % done by 2 h cycle. Water recovery was achieved 98 % with 3 h optimum filtration cycle. Among 2, 2.5, 3 and 3.5 h filtration cycles, 3 h cycle was found to be the optimum cycle for the system, because it shows high water recovery, highest operation period, and low power consumption. |
| Year | 2010 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Energy and Climate Change (Former title: Department of Energy, Environment, and Climate Change (DEECC)) |
| Academic Program/FoS | Environmental Engineering and Management (EV) |
| Chairperson(s) | Visvanathan, C.; |
| Examination Committee(s) | Annachhatre, Ajit P.;Thammarat Koottatep; |
| Scholarship Donor(s) | French Government;Asian Institute of Technology Fellowship; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2010 |