Requirements for nutrient removal from municipal wastewater (MWW) are stringent in order to reduce environmental impact of anthropogenic activities on natural ecosystems. Common practices in MWW treatment involve chemical and bacterial processes. Micro—algae have been proposed as an alternative or complementary approach to MWW treatment but technologies for such implementations remain limited. We propose to test, as a proof of principle, a photo-selection process, designed to reduce the complexity and costs of MWW treatment. This process could be incorporated into existing MWW treatment facilities.