1. Introduction
Macropytes are known to grow rapidly in wastewater due to
the presence of necessary growth requirements (Papadopoulos
et al., 2011). They utilize the nutrients in wastewater for growth
and other metabolic activities. Water scarcity is usually caused
by insufficient local water resources and reduced water quality
due to increasing pollution (Jiang, 2009). The release of untreated
wastewater into water bodies and land contributes much to
this water pollution. It has been estimated that over 40% of the
population of the world (representing about 80 countries), are
already experiencing water stress, with about 30 of these countries
suffering water scarcity in most parts of the year (Kivaisi, 2001