Scale model testing of leachete treatment with willow stack tower and ebb-flow systems
Freire López, Alberto (2012)
Tampereen ammattikorkeakoulu
2012
All rights reserved
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-201203143381
https://urn.fi/URN:NBN:fi:amk-201203143381
Tiivistelmä
The purpose of this thesis was to design, build, develop and compare two different biofilter systems based on earlier Tampere University of Applied Sciences (TAMK)Research and Development studies concerning the treatment of landfill and compost field leachate with microbial activity in a Willow Stack Tower (WST). The first biofilter is a lab-scale model of a WST, where the leachate is distributed over the willow surface by spraying. The other system experimented with in the study is the Ebb-Flow system, where leachate fills and empties the system through the action of a siphon and aeration.
Experiments were conducted in the laboratories of TAMK, specifically, in the greenhouse. This final thesis is a part of a TAMK Learning Project for Energy and Environmental Engineering; it can be used to develop future projects and practical training opportunities for students.
The synthetic leachate water used in the experiments was prepared according to typical leachate concentration values from Pälkäne Humuspehtoori Ltd. In both the WST and Ebb-Flow systems, the analyzed parameters were temperature, pH, BOD5, total phosphorus and total nitrogen. The Willow Stack Tower model and the Ebb-Flow system were tested for different flow rates, leachate phosphorus concentrations, BOD5 values, and total nitrogen concentration.
These results show that the two systems work better at high leachate concentrations. The percentage of nutrients removed from the leachate by the Willow Stack Tower was higher than that of the Ebb-Flow system. Then again, the contaminant removal performance by the willow surface and flow was higher in the Ebb-Flow system than in Willow Stack Tower system.
To conclude, both of these systems could easily be applied in rural areas because they are of a simple design and they require low maintenance. Both systems are also effective methods that could work as a part of leachate treatment process.
Experiments were conducted in the laboratories of TAMK, specifically, in the greenhouse. This final thesis is a part of a TAMK Learning Project for Energy and Environmental Engineering; it can be used to develop future projects and practical training opportunities for students.
The synthetic leachate water used in the experiments was prepared according to typical leachate concentration values from Pälkäne Humuspehtoori Ltd. In both the WST and Ebb-Flow systems, the analyzed parameters were temperature, pH, BOD5, total phosphorus and total nitrogen. The Willow Stack Tower model and the Ebb-Flow system were tested for different flow rates, leachate phosphorus concentrations, BOD5 values, and total nitrogen concentration.
These results show that the two systems work better at high leachate concentrations. The percentage of nutrients removed from the leachate by the Willow Stack Tower was higher than that of the Ebb-Flow system. Then again, the contaminant removal performance by the willow surface and flow was higher in the Ebb-Flow system than in Willow Stack Tower system.
To conclude, both of these systems could easily be applied in rural areas because they are of a simple design and they require low maintenance. Both systems are also effective methods that could work as a part of leachate treatment process.