Wastewater treatment is one of the most exciting, lucrative, and short term applicable venues for algae growers. Algae removes nitrogen, phosphorus and heavy metals from wastewater, creating valuable biomass. Not only is there revenue from substantial wastewater credits and algae biomass, but the algae produce dissolved oxygen necessary for the aerobic bacteria in the wastewater process, reducing costs related to aeration machinery. Here’s some folks doing algae based wastewater treatment work in the UK: http://lnkd.in/bFR2wKRless