TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Method: The method (M1) additionally involves retaining biomass in at least one hydrolysis unit prior to step (a); pre-treating biomass to remove debris prior to step (a); pre-treating biomass to remove debris transferring the biomass to an hydrolysis unit; extracting desired products from the harvested algae; transferring heat produced in a unit of the method (M1) to at least one unit of the method (M1); using the gas produced to generate electricity, where produced electricity is provided to at least one unit of the method (M1) or to an external recipient; providing the water from the algae production unit to another unit of the method (M1) or to an external recipient; transferring gases produced in at least one hydrolysis unit to at least one of gas separation unit, another digester unit, combustion unit or an algae production unit; and processing the harvested algae to produce biodiesel fuel, oils, lipids and fatty acids, protein for use in animal and human food, enzymes and alcohols for industrial uses and other beneficial products. The biomass feedstock is retained for 2-48 hours. The biomass is provided to at least one anaerobic digester unit, and output from at least one anaerobic digester unit is provided to at least one aerobic digester unit. Preferred System: The system additionally comprises at least algae harvesting unit, debris separation unit, and heat transfer and electrical transfer conduits and pumps. The at least one microbial digester unit is an anaerobic digester unit or an aerobic digester unit. EXAMPLE - A biomass was pretreated to remove debris in debris separation unit. Water was added to make the biomass feedstock flowable mixture and the biomass was transported to the hydrolysis unit where it was retained for 20 hours. Carbon dioxide gas was released in the hydrolysis unit, and pumped out of the hydrolysis unit container and the gas was provided to the algae production unit. After 20 hours, the biomass feedstock was pumped to an anaerobic digester unit, where the biomass was acted on by anaerobic microbes for 3 days. Methane gas and ammonia gas, along with minor amounts of other gases, were produced and pumped to a gas separation unit. The gases were separated, and the methane was pumped to energy production unit where it was burned in the process of producing electricity using gas turbine. A megawatt of electricity was produced and portion was used to run the pumps used in the system and to agitate the solutions in the microbial digester units. The ammonia gas was pumped to algae production unit. After 3 days, the resulting liquids and solids from the anaerobic digester unit were pumped to aerobic digester unit. To aid the activity of the aerobic microorganisms, compressed air was pumped into the aerobic digester unit. The biomass remains within the aerobic digester unit for 5 days. Several gases were produced in the aerobic digester unit. The gases, such as ammonia and carbon dioxide were pumped to gas separation unit, where the gases were separated, and the ammonia and carbon dioxide were provided to algae production unit. After 5 days, the resulting liquids and solids from the aerobic digester unit were provided to open pond of algae. In the open pond, 1.5-3 pound/square ft of algae were produced. The gases from other units were bubbled into the pond at various places in the pond. Heat was also provided to the pond from other units. The algae grow. The activity of algae removed nutrients and other elements from the water, so that the water, when separated from the algae, was used safely for agriculture or to add to municipal water system treatment plants. After 2 weeks to 2 months of growth of the algae, the algae were harvested by draining the now-cleaned water from the pond and removing the algae with mechanical reapers. The algae were processed by pressing them to release biodiesel compounds. Alternatively, with other algae, the algae were dried and the dried material was used as animal feed.