NOVELTY - Bio catalysis multi phase process for producing transportation grade renewable natural gas from multiple organic feedstocks comprises: grinding multiple organic matter; mixing multiple organic waste with liquid (water or waste water) to form slurry; feeding the slurry to two-stage bio reactor system and contacting the slurry with special biocatalysts for producing odorless renewable natural gas; purifying the renewable natural gas, compressing the purified gas to get transportation grade compressed natural gas-BioCNG, and recovering drinkable carbon dioxide and organic manure as by-products.    USE - The process is useful for the production of transportation grade renewable natural gas from multiple organic feedstock.    ADVANTAGE - The process: produces renewable natural gas rich in methane content with 85-99% purity, thus indicating very high calorific value that is suitable for use as transportation grade gaseous drop-in clean fuel in existing CNG vehicles without any engine modification; utilizes two stage bioreactor system that separates the various stages of digestion leading to better and more efficient conversion of organic waste to fuel with low hydraulic retention time of just 16 days and occupies very less space; utilizes the specific biocatalyst that (a) removes sulfur in the first stage bioreactor hence there is no generation of corrosive hydrogen sulfide along with renewable natural gas, and the natural gas obtained is totally odorless (all claimed), and (b) rapidly converts the incoming matter to volatile fatty acids, and thus totally eliminates the scum problem from the system, removes hydrogen sulfide hence only carbon dioxide is produced along with renewable natural gas that is separated and purified for use as drinkable carbon dioxide, and intensifies exothermic reaction leading to generation of heat within the bioreactors, while eliminating the requirement of external heating, thus making the system highly energy efficient.    DETAILED DESCRIPTION - Bio catalysis multi phase process for the production of transportation grade renewable natural gas from multiple organic feedstocks comprises: grinding multiple organic matter; mixing the multiple organic waste with a liquid (water or waste water) to form a slurry; feeding the slurry to two-stage bio reactor system and in the bio reactors, contacting the slurry with special biocatalysts for producing odorless renewable natural gas; purifying the renewable natural gas to transportation grade gaseous fuel using a hybrid process of water scrubbing and chemical absorption to achieve methane purity of 85-99%, compressing the purified gas to a pressure of 200 kgs/cm2 to get transportation grade compressed natural gas (CNG) BioCNG, and recovering drinkable carbon dioxide and organic manure as by-products.