Pulverized cactus flesh can clean wastewater just as effectively as the expensive synthetic chemicals used in city treatment plants.
April 25, 2026
Original Paper
Efficiency of Bioflocculants Derived from Melocactus andinus and Stenocereus griseus, for the Remotion of Turbidity and Colour, in Wastewater Treatment
SSRN · 6632133
The Takeaway
High grade water filters usually rely on polyacrylamide, a synthetic chemical that can be expensive and hard to source in remote areas. Researchers found that polysaccharides extracted from two species of South American cacti can perform the same job. When combined with a new type of green solvent, these cactus fibers can pull dirt and color out of polluted water with extreme efficiency. This provides a low cost and biodegradable alternative for providing clean water to decentralized communities. It turns a common desert plant into a professional grade tool for environmental protection. Clean water can now be grown rather than manufactured.
From the abstract
This study introduces novel functionalized polysaccharide-based bioflocculants derived from the low-cost biomass of Melocactus andinus and Stenocereus griseus. The objective was to develop a high-efficiency, bio-derived alternative for water purification to address the critical needs of decentralized community systems. The key novelty lies in the first-time application of Deep Eutectic Solvents (DES) as green functionalization agents for cactus polysaccharides, yielding performance metrics that