FS Bioenergia, a joint venture between Brazilian and U.S.-based investors, said on Tuesday it will build its second corn-based ethanol plant in Brazil’s top grains-producing state of Mato Grosso. FS Bioenergia, the first venture to build a 100 percent corn-based ethanol plant in Brazil - where basically all ethanol is made from sugar cane - said it will spend 1 billion reais (US$ 308 million) on the project.