New treatment combo tackles greywater pollution more effectively than either method alone
Researchers have developed a two-stage greywater treatment process combining plant-based flocculant and biochar that significantly removes heavy metals and pharmaceutical residues. The finding could help water utilities and facilities managers reduce contamination costs while using sustainable, locally sourced materials.
Originaltitel: Use of biochar and <em>Moringa oleifera</em> in greywater treatment to remove heavy metals and contaminants of emerging concern
<p>This study investigated the combination of biochar derived from carbonized local feedstock and Moringa oleifera seed extract-based flocculant, a novel combination in the context of greywater treatment missed in the previous studies, with a focus on the removal of organic contaminants (caffeine, chloramphenicol, trimethoprim, carbamazepine, diclofenac, and bisphenol A) and heavy metals (Cr(VI), As(III), Co(II), Ni(II), Cu(II), Zn(II), and Pb(II)). The research focused on the optimization of dosage, application procedure, and relevance to greywater (presence of humic acids, clay, and surfactants).</p><p>The order of application was found to impact organic compound removal, with the initial application of the flocculant, followed by biochar, being the more effective approach. The combined use of biochar and flocculant positively impacted the removal of heavy metals but impeded the removal of organic pollutants. The presence of humic acids, clay, and surfactants affected the flocculation process, which impeded the removal of heavy metals and organic pollutants.</p>