(SeeNews) - Sep 2, 2011 - Brazilian oil and gas giant Petrobras (SAO:PETR3; NYSE:PBR) already produces 108,000 litres (28,530 gallons) of biodiesel per year in its unit in Quixada, northeastern Ceara state, Miguel Rossetto, president of the company's biofuel arm Petrobras Biocombustivel, said yesterday.