A San Jose-based BioFuelBox Corp. plans to take biowaste normally dumped in landfills and convert the waste into biodiesel. Roughly 350 billion gallons of diesel are used each year; only about 450 million gallons of that are biodiesel. The company’s initial focus is on fats, oils and greases extracted from wastewater. An agreement with a major meat-producing company in Arkansas has been announced.