The soybean plant is an essential commodity in Indonesia because it is the main ingredient for making tempeh and tofu side dishes. The process of making tempeh and tofu will produce liquid and solid waste. Although this waste is rich in nutrients, it will make an unpleasant odor through protein decomposition in the environment. Solid waste is usually used as additional feed for chickens and fish, and even ruminants. However, liquid waste is still a problem when directly disposed of into the environment. This liquid waste has recently been used as a substrate for fermentation into biogas, including methane and hydrogen. It is also used as a growing medium for microalgae. This example has been carried out by home industry players in Sumedang, West Java, Indonesia. Do you have other solutions for agricultural and industrial waste related to agriculture and plantations? Let's pour your ideas into a captivating work.
