Production of Bio-gas from Flowers and Vegetable Wastes Using Anaerobic Digestion

A laboratory study was carried out on anaerobic digestion of vegetable wastes (brinjal, cabbage, carrot, ladies finger) & flowers (jasmine, sunset flower, Roselle, African wattle, Nile tulip flower, silk tree mimosa.) in a 1L capacity of anaerobic digestor using cow dung as an inoculums. The digester was operated in the ratio of 1:1 of substrate to inoculums at RT. The substrate concentrations are varied such as 5%,7%,10% was used and amount of gas produced was analyzed using digital pressure gauge. The Results obtained showed that flowers had given higher yield of biogas than vegetable wastes and the digestion period was less. The average biogas production potential of withered flowers was observed as 16.69g/kg in 4.5days, where in case of vegetable wastes it was 9.089g/kgS in 6 days. The study showed that flowers which are available in abundant in India is thrown away after 1 (or) 2 days use causing nuisance to the environment. It is seen it is a very good feed stock for biogas production. Generation of biogas from flowers upholds the concept of waste to wealth in enhancing sustainability of development. Future research work is mainly focused on the characterization of Bio-gas using sophisticated instruments.