TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Method: The method further includes: powering the temperature-control means by the biofuel, where the temperature-control means is set to provide a sufficiently: high temperature so as to produce methane from the algae, or low temperature so as to produce ethanol from the algae; providing a still with a condensing tube, providing heating means for the still, providing a conduit from the reaction tank to the still, providing a valve in the conduit, and using the temperature control means to establish a temperature within the reaction tank that is suitable for the production of ethanol within the mixture comprising water, algae and seed substance, and after producing the ethanol, heating the still using the heating means, opening the valve in the conduit, and allowing the feedstock mixture from the tank to enter the still, where upon the ethanol will vaporize and leave the still via the condensing tube so that the ethanol vapor will condense and flow into a container for storage and later use; providing a scrubber containing carbonate material for scrubbing the gas and having an entrance and an exit, where the entrance comprises a bubbler tube, the exit comprises a port including a port connected through a valve to a storage container for scrubbed gas, and a port connected through a valve to a vent for the scrubbed gas, providing a source of water for the scrubber and filling the scrubber to a predetermined level with water from the source, supplying the entrance with the gas and causing the gas to bubble through the carbonate material and the water, allowing the scrubbed gas to leave the scrubber through the exit, where the gas enters the entrance, is scrubbed by the carbonate material and leaves through the exit; and using the scrubber to scrub sour methane gas in order to obtain carbon credits. The condensing tube is thermally isolated from the remainder of the still, and is made from materials including copper or aluminum. The stirrer comprises at least one paddle within the reaction tank and a motive source for moving the paddle. The sampling and adjusting tube extends through the lid of the tank. The analyzing measures the pH of the mixture and adjusting the pH and temperature of the mixture comprising algae, water and seed substance in order to indicate a condition including whether any sugars within the algae are exhausted in conversion to alcohol or whether the pH of the mixture has become too low for the yeast to thrive. The method (P1) further includes providing a still connected to the tank, and distilling the contents of the tank when the biofuel is ethanol, thus ethanol can be collected in a container and water can be drained from the still.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The seed substance is yeast and the biofuel is ethanol. EXAMPLE - No suitable example given.