Three different techniques of harvesting microalgae from four pilot scale (125 m 2) and two demonstration ponds (1200 m 2) have been investigated. The processes included centrifugation, chemical flocculation followed by flotation and continuous filtration with a fine-weave belt filter. None of these processes was completely satisfactory. Centrifugation gave good recovery and a thickened slurry,...

The rate of increase in industrialization and daily human activities has resulted in a tremendous increase in the amounts of waste and wastewater containing organic and inorganic pollutants discharged to the environment. Coagulation-flocculation technology has been widely employed in water/wastewater treatment as a convenient and reliable technique for removing colloids, particles, and cell deb...

Summary Flocculation is a mainstream technology for the provision of safe drinking water but limited due to ineffectiveness conventional flocculants in removing trace low-molecular-weight emerging contaminants. We described synthesis strategy development high-performance nanoflocculants (hydrophobic-organic-chain-modified metal hydroxides [HOC-M]), imitating surfactant-assembling nano-...

Abstract Flocculation is used for the removal or separation of colloids, e.g. in water treatment and mineral processing. Alginates are linear, anionic biopolymers composed mannuronic (M) guluronic (G) acids. The relative amount distribution M G impact ion-binding gel-forming properties polymer, but still no one has yet addressed alginate composition on flocculation nanoparticles particles. Our ...

With the growing demand for clean and safe water, there is a pressing need to explore novel materials water treatment applications. In this regard, bio-based polymeric have emerged as promising solution purification. This article highlights numerous advantages offered by materials, including their biodegradability, low cost, renewable nature. Moreover, it discusses in depth two primary applicat...