NOVELTY - Extremophilic microalgae are cultured and harvested by preparing growth composition comprising extremophilic microalgae and water comprising nutrients capable of enhancing growth of microalgae, allowing microalgae to proliferate in the composition at room temperature or under ambient outdoor conditions with intervals of ambient temperatures of greater than or equal to 40 degrees C and ambient light of 1400-1600 watts, dewatering the composition, and recovering an algal biomass comprising microalgae and less than or equal to 5% water content.    USE - Culturing and harvesting method of extremophilic microalgae for use in the production of biofuels, fertilizers, dietary nutrients, pharmaceuticals, polymers, and biofilters to remove nutrients and other pollutants from wastewater, space technology, and laboratory research systems.    ADVANTAGE - The microalgae may provide high production of hydrocarbons, especially carotenoids, and bioremediation of sewage/wastewater, making the treated sewage/wastewater easier to further process in water treatment plants to clean water. The method is more reliable, resilient, and cost-effective than previous techniques.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: (1) inhibition growth of microorganism which involves contacting cells of microorganism with an extract of Scenedesmus species Novo; (2) wastewater treatment method which involves preparing growth composition comprising extremophilic microalgae and wastewater in which wastewater contains nutrients capable of enhancing growth of microalgae, allowing microalgae to proliferate in the composition at room temperature or under ambient outdoor conditions, dewatering the composition, and recovering an algal biomass comprising microalgae and less than or equal to 5% water content; and (3) sewage and/or wastewater treatment to promote bioremediation which involves preparing growth composition containing extremophilic microalgae and sewage and/or wastewater in which sewage and/or wastewater contain nutrients capable of enhancing growth of microalgae, allowing microalgae to proliferate in the composition at room temperature or under ambient outdoor conditions, testing sewage and/or wastewater to determine the level of pollutants, and recovering algal biomass comprising microalgae from sewage and/or wastewater when the level of pollutants in sewage and/or wastewater reaches a desired level.