Heavy metals in landfill leachate : options for reduction and treatment | |
| Author | Vichean Sivapornpun |
| Call Number | AIT Thesis no.EV-00-17 |
| Subject(s) | Sanitary landfills--Leaching Sewage--Purification--Heavy metals removal |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering |
| Publisher | Asian Institute of Technology |
| Abstract | Five leachate samples were collected from various age of operation landfill to investigate the feasibility of chemical precipitation and sequencing batch reactor treatment for heavy metals removal. The target heavy metals were mercury (Hg), Lead (Pb), Nickel (Ni), and Cadmium (Cd). By using Ca(OHh as precipitant, the optimum pH was in range 10-11 with removal efficiency 63.6-6.5.7% (Hg), 48.9-72% (Pb), 62.2-64.9% (Ni), and 63.6-65.7% (Cd). However COD removal was 0-40%. There were no significant data indicating the optimum dose of Na2S supporting the Ca(OHh precipitation during the experiment. Different age, BODs/COD ratio, NH3, and TSS/TS ratio in the leachate led to different heavy metals removal efficiency. Sequencing Batch Reactor was operated in different anoxic/aerobic mode, which allowed nitrification and denitrification. SBR showed 90-95% removal of COD, ammonia, and nitrate removal, but 16 % mercury removal. All investigated data were useful to propose the leachate treatment of a new landfill using the Phi Sa Nuk Lok sanitary landfill for a case study. |
| Year | 2000 |
| 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) | Trankler, Josef; |
| Examination Committee(s) | Preeda Parkpian;Fukushi, Kensuke; |
| Scholarship Donor(s) | Royal Thai Government; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2000 |