METHOD AND APPARATUS FOR MANUFACTURING SLOW-RELEASE FERTILIZER USING ACTIVATED OYSTER SHELL AND ANIMAL WASTEWATER

摘要

PURPOSE: A slow-releasing fertilizer manufacturing method by collecting organic components of livestock wastewater with activated oyster shell is provided to improve quality of soil by processing the livestock wastewater with calcium compositions and various minute elements. CONSTITUTION: A slow-releasing fertilizer manufacturing method by collecting organic components of livestock wastewater with activated oyster shell includes the following steps of: drying and washing the surface of the oyster shell with tap water to remove organic materials; decomposing the dried oyster shell with rotary kiln in nitrogen atmosphere; and pulverizing and sieving the thermally decomposed oyster shell.