I love the algae world and a lot of things can be done with these spectacular mico-organisms. Pharmaceutical, proteins, cosmetic... and also wastewater treatment.. yes, algae live with nitrogen and phosphorus that are common pollutants.
Copied from the http://www.oilgae.com web site I can summarize the following text:
" Algae are an important bioremediation agent, and are already being used by many wastewater facilities. The role that algae can play in wastewater remediation is however much higher than its current role.
Use of algae as the bioremediation agent enables us to solve two key problems: increased use of chemicals and high energy costs. Thus, algae-based waste water treatment is a powerful avenue for sustainable wastewater treatment.
Algae-based remediation of wastewater is not without its challenges; however, the potential is so high and the problem so critical that there are a number of research efforts - both in the academia and in the commercial sector - ongoing in order to address these challenges."
A good report can be dwnld or buyed in the oilae.com web site..
Another good reading with a literature review is here...tidskriftenvatten.se as pdf document named "WasteWater treatment With microalgae – a literature review" written by Karin Larsdotter (School of Biotechnology, Stockholm)