The aim of this study was to investigate the effect on plastics during co-pyrolysis with biomass. Pyrolysis of sawmills powders (SP), polyethylene (PE) and their mixtures was carried out in a semi-batch reactor with varying temperatures at 550 °C and 600 °C. This work is a preliminary study for the development of a co-pyrolysis process of plastic wastes with biomass with the aim to produce an alternative liquid fuel for industrial use. Experiments were carried out with plastics and biomass to highlight the interactions occurring between a plastic and a biomass during their co-pyrolysis. It appears that the main decomposition event of each component takes place at higher temperatures when the components are mixed than when they are alone, possibly because the two components stabilize each other during their co-pyrolysis. These interactions depend on the nature of the plastics and the biomass. In addition, co-pyrolysis experiments were led in a lab-scale reactor using a mixture of plastic wastes and biomass. The influence of some key operating parameters on the outcome of the process was analysed. Hence, this co-pyrolysis process could be economically viable, provided heat losses are addressed carefully when designing an industrial reactor. The maximum liquid product yields for the pyrolysis of SP and PE obtained were 35,17% and 61,00%, respectively, whereas the maximum liquid product yield for SP/PE copyrolysis was 46,05% at 550 °C with 1:1 blend ratio.

Ecological processes that occur in a lake depend on the physico-chemical (abiotic) and biotic factors of the system and the interrelations between them. It can be concluded that the current nutrient loadings from both point and non-point sources are cause to increase eutrophic case over the years. This study indicate that the sustainable utilization of reservoir in combination with proper wastewater treatment plant and controlled use of pesticides has a potential to reduce the current nutrient loadings into Suat Uğurlu Lake. The estimated nutrient reductions that could be achieved from the management scenario would be enough to revert the lake from mesotrophic situation to trophic state. The reduction of nutrient loadings into Suat Uğurlu Lake could be achieved through the practice of Integrated Water Resource Management (IWRM), through good management. However, as long as pertinent issues of urban poverty, watershed management and public awareness and involvement in water related issues are not addressed, trophic in Suat Uğurlu Lake will remain a problem.