A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Valorization of olive mill wastewater by its incorporation in building bricks
This investigation deals with the possibility of incorporating the effluent resulting from olive oil extraction activity, known as AMW (olive oil mill wastewater), in the brick-making process. It was undertaken at an important Tunisian brickworks company. In this study, the OMW was mixed with clays following the same brick-making procedure used at the collaborative brickworks in Tunisia. The samples containing OMW were found to be comparable in forming/extrusion performance to a control product that used fresh water. The experimental products produced were tested for their comparative physical properties (volume shrinkage, water absorption, tensile strength of bricks, after firing at 920 deg C and paste plasticity) in the unfired and fired states against a control representing the commercial product in the same factory. The results showed a significant increase in the volume shrinkage (10 %) and the water absorption (12 %), while the tensile strength remained constant. The maximum plasticity index value was found when incorporating 23 % of OMW. This rate either maintained the physical and mechanical properties of bricks or improved them. The incorporation of OMW in bricks can represent a promising way to valorise this effluent, to rid the environment of a highly polluting wastewater and to save huge and precious amounts of water in a country where water shortage is a serious problem. This newly-prepared material has a double positive impact: it protects the environment and allows water economy.
Valorization of olive mill wastewater by its incorporation in building bricks
This investigation deals with the possibility of incorporating the effluent resulting from olive oil extraction activity, known as AMW (olive oil mill wastewater), in the brick-making process. It was undertaken at an important Tunisian brickworks company. In this study, the OMW was mixed with clays following the same brick-making procedure used at the collaborative brickworks in Tunisia. The samples containing OMW were found to be comparable in forming/extrusion performance to a control product that used fresh water. The experimental products produced were tested for their comparative physical properties (volume shrinkage, water absorption, tensile strength of bricks, after firing at 920 deg C and paste plasticity) in the unfired and fired states against a control representing the commercial product in the same factory. The results showed a significant increase in the volume shrinkage (10 %) and the water absorption (12 %), while the tensile strength remained constant. The maximum plasticity index value was found when incorporating 23 % of OMW. This rate either maintained the physical and mechanical properties of bricks or improved them. The incorporation of OMW in bricks can represent a promising way to valorise this effluent, to rid the environment of a highly polluting wastewater and to save huge and precious amounts of water in a country where water shortage is a serious problem. This newly-prepared material has a double positive impact: it protects the environment and allows water economy.
Valorization of olive mill wastewater by its incorporation in building bricks
Mekki, Houda (author) / Anderson, Michael (author) / Benzina, Mourad (author) / Ammar, Emna (author)
Journal of Hazardous Materials ; 158 ; 308-315
2008
8 Seiten, 7 Bilder, 19 Quellen
Article (Journal)
English
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