Pilot scale studies on direct filtration of domestic wastewater using the ceramic micro-filtration system | |
| Author | Athit Phetrak |
| Call Number | AIT Thesis no.EV-09-03 |
| Subject(s) | Water reuse Factory and trade waste |
| 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 | Pilot scale ceramic micro filtration was used for direct filtration of domestic wastewater to investigate filtration cycle and permeate quality. Similarly, backwash wastewater from its various experimental runs was mixed with organic fraction of municipal solid waste in order to obtain benefits from biogas production. This study was done to develop the concept of decentralized integrated wastewater-organic waste treatment system. Two main experimental runs were conducted in ceramic micro filtration system, namely with coagulant and without coagulant. The experimental run with no coagulant resulted in 104 hours or 4.3 days of filtration cycle. Suspended solid and turbidity were removed with 99% and 97% of removal efficiency, respectively. COD, BOD, TN and TP were removed from feed water with 70%,49 %,52 % and 15% removal efficiency, respectively. In the second experimental run, 20 mg/L Poly aluminum chloride and 40 mg/L Ferric chloride found optimum through Jar test tested. This coagulant treatment increase filtration cycle through 232 hours and 304 hours, respectively. It can be concluded that coagulant condition can increase filtration cycle approximately 3 times as compared with no coagulant. Moreover, it also improved permeate quality. Suspended solid and turbidity were removed almost completely. Similarly, COD and BOD were removed by 55-69% and 80-82%, correspondingly. In terms of biological property, coliform bacteria and micro-particle in same size with Giardia and Cryptosporidium were removed almost absolutely with all experimental runs of ceramic microfiltration system. Permeate qualities in the run with coagulant use (PACI and FeC1₃) complied with agricultural irrigation standards and guidelines, which can be applied for all types of irrigation activities. Nevertheless further treatment might be required for permeate with on coagulant use prior to its application for irrigation. Sludge containing aluminum had no detrimental effect on anaerobic digestion which could be suitable for anaerobic condition. Furthermore, it can increase yield of methane. by 18% from same amount of organic waste. It can imply that ceramic microlfiltration system run with 20 mg/L PACI was suitable condition because of longer filtration cycle, good permeate quality complying irrigation guidelines, and increase methane production. |
| Year | 2009 |
| 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) | Chongrak Polprasert;Preeda Pakpain; |
| Scholarship Donor(s) | Asian Institute of Technology;RTG Fellowship; |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 2009 |