Biogas production by Bacillus sp. anaerobic cultivations: new trend of alternative energy source in urbanized areas - Neves, Luiz Carlos Martins das; Souza, Carlos Fernandes de Melo; Ishii, Marina; Vessoni Penna, Thereza Christina; Converti, Atílio (Symposium on Biotechnology for Fuels and Chemicals, 2008)