Tertiary wastewater treatment

Benefits of using microalgae for tertiary wastewater treatment

Avoid secondary pollution
Efficient use of solar energy – Solar biotechnology
Production of oxygen
Production of useful microalgal biomass
Elimination of xenobiotics and heavy metals
Cheaper alternative to chemicals
The positive effect of the microalgae growth-promoting bacterium (Azospirillum) on microalgae (Chlorella) used for wastewater treatment (illustrated by Y. Bashan).

Our Technology:

Immobilizing the green microalga Chlorella spp. with the PGPB Azospirillum brasiense in alginate beads, diminish Nitrogen and Phosphorus from wastewater.

Our system

Simplicity; only 3 ingredients+ wastewater
Microorganisms are protected inside alginate beads

Cheap heterotrophic wastewater treatment:

  • Dark cultivation with a cheap carbon source, or only partial light makes it more economically
  • Both Chlorella and Azospirillum can grow heterotrophically on glycerol which assist in wastewater treatment.

Success stories under extreme conditions

Our wastewater treatment system is working under hot desert conditions

Our system was tested successfully in desert summer temperature of 40oC (100+ oF) and solar radiation up to 2500 μmol/m2/s in southwestern USA and northwestern Mexico