Although related tests indicated that mucilage extracted from Opuntia spp. cactus acted as anefficient coagulant for bacteria and kaolin particles (Buttice et al., 2010), no significant algaerecovery was observed with cactus mucilage in this study. Good harvesting efficiency (85%)was observed using Moringa Oleifera seed powder, although the dosage needed (4,670 mg/L)was much higher than the dose required for other coagulants (Table 2). Teixeira et al. (2012)found that at a moringa concentration of 1,000 mg/L, C. vulgaris recovery increased with
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