Slow-Release Fertilizer Composition and Preparation Method

摘要

A method of making the slow-release fertilizer and the composition thereof includes the steps of adding Class A Exceptional Quality biosolids at a percentage-by-weight of 35% to 75%, brewing grains at a percentage-by-weight of 10% to 50%, and dried algae at a percentage-by-weight of 5% to 20%. Biosolids are digested in an anaerobic digester for 15 days. Biosolids are dried to a moisture content under 6% and brewing grains and algae are dried to a moisture content under 10%. Algae is pressed to isolate the dried algae cell wall. The algae is dried to a moisture content under 10%. The Class A Exceptional Quality biosolids, brewing grains, and algae cell wall are pulverized to a mesh size between 100 to 300 and blended according to the above proportions.