NOVELTY - Production of micro-algae product includes collecting urine from lactating cows, mixing collected urine with aerobically digested cow manure to form mother liquor, and fermenting the mother liquor in an algae growth tank. Two distinct layers of top water including a top water layer which contains yeast byproducts and algae byproducts are formed.    USE - The method is used for producing micro-algae product (claimed) for use in animal feeds, animal watering systems, lagoon treatment, environmental control, and field crop treatment. The product may be used with animals other than ruminants, e.g. horses, turkeys, chickens, pigs and ship.    ADVANTAGE - The micro-algae product enhances the availability of nutrients and produces compounds, enzymes and associated factors that aid digestion, enhance energy and stimulate beneficial processes. The micro-algae product also aids in the prevention of acidosis, reduces odor, and provides shiny coat for animals. Polysaccharides produced by micro-algae have immunological, nutritional and therapeutic benefits. Lower death rates among calves and young animals are observed during development of the rumen. Improved milk production and longer-lived animals are also achieved. Polysaccharides produced by the algae provide matrix or tonic that supports the production of beneficial flora in the ruminant and provides immunological side-effects. In the barns where cows treated with the micro-algae are kept, fly population is lowered. For wastewater lagoon treatment, enhanced bubbling from release of carbon dioxide and methane gases at depth, solids rising to the surface, and eventual liquefaction of all solid manure wastes in the lagoon are observed. The micro-algae product enhances nutrient breakdown, improves cation exchange capability, provides carbon in useful forms, provides micronutrients to enhance plant health, encourages nitrogen-fixing bacteria in soil, and increases organic material content in soil. For field crops, better water penetration into the soil, better water retention, and higher crop yields are observed. Salinity-damaged soils may be returned to productivity with micro-algae treatment.    DESCRIPTION OF DRAWING(S) - The drawing is a diagram of producing micro-algae product and separating top water component.