Pre-treatment of domestic solid waste by enhanced leaching | |
| Author | Dayanthi, W. K. C. N. |
| Call Number | AIT Thesis no. EV-03-26 |
| Subject(s) | Domestics -- Waste disposal Leaching |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master pf Engineering. |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. EV-03-26 |
| Abstract | It seems to be an oncoming disaster that the amount of municipal solid waste generation is in the increasing phase as a result of urbanization and industrialization. Therefore, a landfill with low impact waste, generating less gas and less polluted leachate is highly important. Hence, processes leading to considerable reduction of these complications prior to disposal in landfills sound imperative. The major objective of this study was to leach as much as pollutant constituents as possible within a shorter time period, either by accelerating degradation or accelerating flushing out of soluble pollutants. Hence, three different types of leaching experiments namely: shake flask leaching, laboratory and pilot scale leaching were carried out. In the shake flask leaching experiments, it was derived that a solid over water ratio 1 :2 enhanced SCOD transfer into leachate and pH did not effect significantly on leaching. On the basis of laboratory experiments, several kinetic conditions could be optimized in terms of enhanced leaching resulting in high settlements and high total and volatile solid losses. Those optimized kinetic conditions included a downward leachate recirculating flow with a frequency of tlU'ice a day for four hours. It was observed that a compaction density higher than 500 kg/m3 drastically reduced leaching. The influence of flow rate was not considerable. Periodic leachate removal and replacement with fresh water seemed to enhance leaching. A pilot scale reactor (0.5 m3 ) applied with the aforementioned optimized conditions released 294 g SCOD, 122 g DOC and 10 g TKN per kg of dry raw solid and possessed a settlement of 66% of the initial depth of the solid column within seven days ofrun. |
| Year | 2003 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. EV-03-26 |
| 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. ;Trankler, Ing. Josef ;Thammarat Koottatep |
| Scholarship Donor(s) | Government of The Netherlands |