Biogas Rainwater countermeasures digestive liquid residue コロナ禍で中断している。抜本的な対策のアイデアが必要である。 The biogas system in Hokkaido follows the Danish style and is an open type that stores digestive juice debris. The basis was the annual rainfall of less than 800 mm. As a current actual measurement, rainwater of about 1300 to 2000 mm has been observed. A dairy farmer with 200 milking cows can calculate that a lagoon area of 500 square meters to 1000 tons can be shipped to the pasture. In other words, the number of exports is about twice as much as planned, but since 100 5-ton tank trucks are transported for about 20 km, fuel and labor costs for a mileage of 2000 km are a burden. It is a loss of about 300,000 yen for 2 people x 10 days and fuel cost alone. Costs increase for canopies, etc., and it is necessary to come up with some efficient method for removing rainwater.
