NOVELTY - Treatment of biological waste containing target material (e.g. straw, nitrate, fats) comprises introducing waste into a first water filled lagoon; adding microbes that convert the target material into at least one other material; aerating the first lagoon with aerators on the bottom of the lagoon to produce a laminar column of bubbles; circulating the first lagoon with at least one circulator; sending a portion of the water to a second lagoon; and aerating and circulating the second lagoon. The aerators are supplied by a compressed air supply.    USE - For treating biological waste containing target materials, e.g. straw, polysaccharides, cellulose, nitrite, nitrate, ammonia, phosphorus, pectin, hydrocarbons, fats, oils, proteins, agar, keratin, volatile organic compounds, hydrogen sulfide, lignin, or paper (claimed).    ADVANTAGE - The method processes waste quickly and efficiently, with a minimum of odor and as completely as possible. It is able to process solid waste quickly enough that solid waste does not build up. It minimizes both the capital and recurring costs.    DETAILED DESCRIPTION - Treatment of biological waste containing target material comprises introducing the waste into a first water filled lagoon (202); adding to the first water filled lagoon, microbe(s) for converting the target materials in the waste to at least one other material; aerating the first water filled lagoon with aerators dispersed on the bottom of the first water filled lagoon, the aerators adapted to produce a laminar column of bubbles (210), the aerators being supplied by a first compressed air supply; circulating the first water filled lagoon with circulator(s) to cause the first water filled lagoon to circulate; sending a portion of the water filled lagoon to a second water filled lagoon; aerating the second water filled lagoon with aerators dispersed on the bottom of the second water filled lagoon, the aerators being supplied by a second compressed air supply; and circulating the second water filled lagoon with circulator(s) to cause the second water filled lagoon to circulate.    DESCRIPTION OF DRAWING(S) - The figure is an illustration a cross-section of a lagoon.    Lagoon (202)    Manifold (204)    Pipe (206)    Diffuser (208)    Bubbles (210)