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Articles by Belgacem Hanchi
Total Records ( 3 ) for Belgacem Hanchi
  Mohamed Anis El Hammadi , Melika Trabelsi and Belgacem Hanchi
  In this study objective was to determine the phytotoxicity of textile sludge, municipal sludge and their produced composts made from a mixture of sludge and greenwaste (1:1 ratio w/w). The toxicity of the different materials was investigated using sunflower germination bioassays. After the incubation period, percentage of viable seeds and root length as well as germination index were determined. The germination index varied from 30.73 to 95.05% and both textile and municipal sludges presented higher phytotoxicity level than their produced composts. An important observation was that the inhibition of root growth appeared as more sensitive phytotoxicity indicator than the percentage of viable seeds. The germination index indicated the reduction of sludge phytotoxicity with composting. This research provides a basis for the further improvement of composting and for future risk assessments of compost application.
  Mohamed Anis El Hammadi and Belgacem Hanchi
  The aim of this study was to evaluate xenobiotics contents (Detergent, heavy metal and chloride) of final compost made from different wastes (Textile sludge, municipal sludge, municipal waste and garden waste). After composting, there was an increase in total heavy metal contents in compost because of loss of mass due to biodegradation of organic matter. In addition, we recorded a slight increase of chloride content. On the other hand, this study demonstrates that aerobic biodegradation has important environmental consequence for detergent contents in the pile that biodegrade in the presence of air during the composting process. However, proper consideration should be given to the compost metal content and further field studies are required to examine the long-term effect of the final product in soils, particularly in relation to biological indicators of soil quality.
  Mohamed Anis El Hammadi , Melika Trabelsi , Amel Jrad and Belgacem Hanchi
  In the research reported here, heavy metals and polycyclic aromatic hydrocarbons (PAH) were analyzed in selected Tunisian activated Sludge and the produced compost. The GC-MS study demonstrates that not PAH were detected in the activated sludge and the final compost contain only natural PAH compounds. Major differences were observed between the sludge and the mature compost studied as regards their total heavy metal contents. An increase in total Fe and Mn ions was observed in the produced compost Addition of green waste as co-compost to activated sludge caused a significant reduction of total Cd and Cu contents in the compost due to dilution effect and the sludge led to greater content of total heavy metal concentrations. The total metal contents in the final compost were much lower than the French limit values of composts to be used as soil fertilizer. Both GC-MS study and the total heavy metal analysis provided valuable information concerning amount of toxicants in the compost and the sludge.
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