MOROCOMP (LIFE TCY05/MA000141) - Unit of Environmental ...

sufficiently and spread outside the bioreactor’s installation building to form a pile. Six
representative samples were being collected from different points within the pile. The
final sample was formed after stirring and mixing the six samples together to form a
homogeneous material. From this homogeneous material six separate samples were
selected from which a series of parameters were evaluated. The average value of each
parameter was calculated from the average value of the separate samples. The
examined parameters of the end product for each composting trial were the water
content, pH, total carbon, total nitrogen, C:N ratio, nitrates (NO - 3 - N), ammonium
nitrogen (NH + 4 - N), total phosphorous as P 2 O 5 , total potassium as K 2 O, magnesium,
manganese, calcium and heavy metals concentration (Cd, Cr, Cu, Ni, Pb, Zn). To
estimate the reduction of the pathogenic microorganisms biological analyses have
been performed to evaluate their density prior and after the composting processes.
The analyses evaluated the density of the total and faecal coliforms and helminth eggs
in sludges and in the compost produced from each trial.
4.8. Preparing the system for the implementation of the next composting trial
Monitoring and maintenance of the in-vessel bioreactor and the rest of the equipment
and infrastructure was performed in order to prepare the system for the
implementation of the next composting trial.
4.9. Assessment of the composting trial in order to improve the next trial
At this point a thorough evaluation was performed on the obtained results and
observations during the composting trials as well as on the analysis of the problems
which arose during the implementation of composting. The conclusions that were
made were taken into consideration for the formation of the next composting trials.
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