Sand filtration method

The sand filtration method is one of the water purification techniques used in the sake brewing process. In this method, water is filtered through sand, gravel, and small stones. It is usually carried out after initial treatment by aeration, and it removes impurities while the purified water retains the components needed for sake brewing. A distinguishing feature of sand filtration is that it not only cleans the water but also has a positive effect on flavor and quality. It is one of the important processes for maintaining the quality of sake.