Treatment of surface water and municipal wastewater by hybrid ceramic microfiltration systems | |
| Author | Le Anh Tuan |
| Call Number | AIT Thesis no.EV-08-19 |
| Subject(s) | Water reuse--Thailand Sewage--Purification |
| 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 | Concerns of limitations of conventional technologies for surface water treatment and reuse potentials of municipal wastewater have led to increased interest in membrane technologies. One of the most attractive membrane materials in the water and wastewater works nowadays that has been researched and developed is ceramic membrane. The ceramic membrane has many advantages for overcoming problems generated from conventional water and waste treatment systems. This research was conducted with hybrid ceramic microfiltration (CMF) systems in which pre-treatment processes were used to enhance the micro-filtration, in the ambient conditions of the tropical region. Feed waters for the pilot systems were synthetic water, surface water, and municipal wastewater. It was found out that the hybrid ceramic microfiltration systems were very attractive on surface water treatment. When combined with pre-treatment coagulation-flocculation, the hybrid ceramic microfiltration removed highly almost all of pollutants including microbial pathogens. Suspended solid, total coliform, and fecal coliform, were removed completely in all direct and hybrid CMF systems. Giardia and Cryptosporidium removal efficiency of 99.77% and 99.92 % was achieved in poly aluminum chloride (PACl) + CMF hybrid system and powder activated carbon (PAC) + PACl + CMF hybrid systems, respectively. The highest TOC and DOC removals were more than 80 % with the PACl + PAC + CMF hybrid system. Permeate of the hybrid systems was very good for portable water. Furthermore, the research also investigated that ceramic membrane could be applied attractively in municipal wastewater treatment. The highest pollutants removal rates were achieved in the PACl + CMF hybrid system. BOD and COD were removed at 67 % and 63 %, respectively. Total coliform and fecal coliform were removed completely. Almost all of measured parameters of permeate in the hybrid systems met standards for reuse activities such as irrigation and other agricultural purposes. |
| Year | 2008 |
| 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 (EV) |
| Chairperson(s) | Visvanathan, C.; |
| Examination Committee(s) | Preeda Pakpian;Thammarat Koottatep; |
| Scholarship Donor(s) | Ministry of Education and Training (MOET), Vietnam;Asian Institute of Technology Fellowship; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2008 |