TECHNOLOGY FOCUS - BIOTECHNOLOGY - Preferred Method: The method (M1) further involves recycling a second portion of exhaust gas stream by passing through tank, passing first portion of cultivated algae through landfill to increase methane production in landfill, passing second portion of cultivated algae to biodiesel production tank, where one or more algal oils and lipids from cultivated algae are converted to biodiesels by transesterification reaction, and collecting biodiesel produced in tank using collection vessel (224). The electric current produced by generator is used to operate machinery, supply power to electric grid (220), power electrical devices or for other suitable applications. The method (M2) further involves transferring portion of cultivated algae to landfill to increase methane production in landfill. The gas stream comprises exhaust gas stream from methane powered generator. The methane powered generator is operated by methane gas generated in landfill. Preferred System: The other released cellular components comprise neutral lipids, proteins, triglycerides, sugars or their combinations and modifications. The system (S1) further comprises optional unit for processing algal biomass comprising lysed algal cells after separation of algal oils or lipids by drying to use as animal feed or for energy generation. The waste management unit is landfill. The system (S1) further comprises unit for recycling first portion of exhaust gas stream to waste management unit, and unit for recycling second portion of exhaust gas stream to cultivate one or more biological species by passing through tank. The biological species comprises bacterial cells, viral cells, fungal cells, algal cells, protozoal cells, mammalian cells or their combinations. ACTIVITY - No biological data given. Test details are described but no results given. Test details are described but no results for the compounds of the claims are given.    MECHANISM OF ACTION - None given.    EXAMPLE - No suitable example given.