Investigation on ceramic membrane based filter backwash water recycling and energy conservation potentials for water treatment plants | |
| Author | Kalaimathy, Sundara Nadarajah |
| Call Number | AIT Thesis no.EV-12-18 |
| Subject(s) | Water reuse Water conservation Water treatment plants Energy conservation |
| Note | A thesis submitted in partial fulfillment of the requirements for the Degree of Master of Science in Environmental Engineering and Management |
| Publisher | Asian Institute of Technology |
| Abstract | Drinking water demand is increasing significantly due to the continual population growth. Water purification sectors are involve in the process of removing undesirable chemicals, materials, and biological contaminants from contaminated water to produce water fit for human consumption. There are three challenging aspects which reduce the efficiency of a water treatment system at the same time damage the natural environment. Which are wastage of treated water for filter backwashing, undesirable volume of wastewater and treatment and the consumption of large amount of energy. Nearly 1.42% of treated water is used to regenerate the filters in Bangkhen water treatment plant. This research was focused on develop a method for recycling the filter backwash water using ceramic membrane based pilot scale experiment for reduction of the pollutants exists in the filter backwash waters. Ceramic micro filters have the higher potential for removing Cryptosporidium and Giardia exists in natural water sources which is concentrated in filer backwash waters. The experiment confirmed high removal for colour, turbidity, iron, manganese and aluminium for 0.1 and 1 μm membranes. In terms of bacteria removal the filtrate received from 0.1 μm membrane showed 100% removal for coliform and E.coli, however the 1 μm membrane filtrate contains significant amount of colirom and E.coli organisms. In addition the CMF system showed the high water recovery lead to minimize the wastewater volume for sludge dewatering process. The study on energy bench marking for energy consumption per unit volume production for the water treatment plant in Sri Lanka showed in the range of 0.07 - 0.82 kWh/m³. In the mean time the reduction of Non revenue water contributes to save large amount of energy and cost. The ISO 500001 energy management standard is a systematic management process contributes to reduce the energy consumption in water treatment plants. |
| Year | 2012 |
| 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) | Thammarat Koottatep;Shipin, Oleg V.;Manit Pongchalermporn; |
| Scholarship Donor(s) | Joint Japan/WBGSP; |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 2012 |