Global Journal of Environmental Science and Management | 2019
Biogas generation from floral waste using different techniques
Abstract
There is a great\xa0need to implement low-cost\xa0and user-friendly\xa0methods for further propagation of biogas technology in India.\xa0Environment unfriendly disposal of floral waste causes serious\xa0environmental pollution. Literature shows a limited research work regarding the anaerobic digestion of floral waste for biogas generation.\xa0\xa0The\xa0present experimental work aims to\xa0propagate\xa0floral waste as a sustainable source of biogas energy in India. Using\xa0different techniques\xa0like novel alkaline pretreatment, solar heating of the digester and co-digestion with food waste give enhanced biogas production from floral waste.\xa0A novel alkaline pretreatment of the floral waste using\xa0sodium carbonate and sodium bicarbonate\xa0gives an improvement in biogas output by 106%, with\xa0a saving in the cost of chemical pretreatment\xa0up to 96%, compared to traditional sodium hydroxide pretreatment.\xa0Also, solar heating of the digester increases the biogas output by 122% as compared to digesters in ambient conditions. Co-digestion of the floral waste with food waste also improves biogas output by 32.6%. Raw biogas from floral waste contains over 57% methane,\xa0which is higher than the previous studies. Large-scale application of the techniques can benefit the society.