The treatment of wastewater before disposal can reduce risks of environmental pollution, and also can reduce hazards to the living environment (human, animals, fishes, and vegetation). More goals can be achieved by regarding the treated effluent as a resource for sustainable development, rather than be a material disposed off. The optimisation of this practice requires intensive investigation and studies before using the treated wastewater, in a wide scale, as a resource. This study has focused on regarding the treated wastewater as a reliable source for crops irrigation in arid and semi-arid...