Kozyatnyk, et al (2024) Exploring the synergy between biochar and Moringa oleifera seed proteins for greywater remediation. IWA 17th SWWS and 9th ROS.

Access to clean water is a pressing global issue, particularly in developing regions where traditional water treatment methods are costly and inaccessible. A recent study explores an innovative approach that combines biocharBiochar is a carbon-rich material created from biomass decomposition in low-oxygen conditions. It has important applications in environmental remediation, soil improvement, agriculture, carbon sequestration, energy storage, and sustainable materials, promoting efficiency and reducing waste in various contexts while addressing climate change challenges. More, derived from local firewood, with Moringa oleifera (MO) seed extracts to treat greywater. Greywater, which includes water from laundry and kitchen use, is a significant resource for reuse but often contains harmful contaminants.

In laboratory and field tests conducted in Kenya, the researchers evaluated the efficacy of this combination for removing contaminants like heavy metals, organic pollutants, and turbidity. The biochar acted as a low-cost adsorbent, while Moringa seed extracts, known for their natural flocculating properties, enhanced the treatment by reducing color and turbidity. Results showed the MO extract significantly improved water clarity, reducing turbidity by up to 98% and color by 67% in field settings. However, it also increased organic carbon levels due to residual seed proteins.

Optimizing the dosage of MO extract proved crucial, as higher concentrations achieved better coagulation. Although challenges like residual surfactants and humates affecting treatment efficiency were noted, this method holds promise for sustainable water management.

This approach highlights the potential of leveraging local materials and traditional practices for water remediation, aiding in irrigation, food security, and socio-economic development. Future work will focus on refining treatment protocols and managing the resulting sludge for broader application in water-stressed communities.