What type of fertilizer granulator is commonly used in the production of organic fertilizer?

According to our survey of fertilizer companies, over 90% of livestock and poultry manure producing organic fertilizers are using disc or drum granulation equipment, with a yield of 50-70%. The moisture content of the material is generally 50-60. This data is very reliable. I believe people who have made fertilizers can basically understand these data. We conducted a special investigation on cow and sheep manure (round particles). Many fertilizer companies use disc granulation or rotation.