You see these all over Haiti as well. They're small-scale sugar mills. And the waste product from them after you extract the juice from the sugarcane is called "bagasse."
ハイチでも よくみかける 小規模の砂糖精製工場です サトウキビから ジュースを搾り取ったあとのカスは “バガス”と呼ばれてます