The present disclosure relates to a self contained composting toilet system to produce a compost material by bio-conversion of a waste matter. The toilet system 100 comprises a waste matter receptacle 102 to separate urine and waste matter, and a bottom container 104 comprising a filtration unit 302 to filter out solid waste matter from the water matter, a sterilization unit 304 for sterilization of the solid waste matter, and a bio-conversion unit 306 for converting the sterilized waste matter into the compost material, wherein the sterilization and bio-conversion of the waste matter inhibits growth of undesired microorganisms in the waste matter and improves safety factor of the waste matter prior to its composting.