| 摘要 |
PURPOSE: Provided is a manufacturing method of organic fertilizer by alkali stabilization of shells due to mixing CaO from shells with organic wastes. Accordingly, the resultant organic fertilizer has high quality and protection against harmful bacteria. CONSTITUTION: The organic fertilizer is manufactured by mixing shell powder (CaO) with organic wastes such as animal and human wastes, sewage sludge and food waste. The CaO powder as an alkali stabilization additive is obtained by washing shells, sintering shells at 900-1000deg.C for 30min to remove organics and form pores, and grinding and pouring ground shells into a #200 sieve. The CaO powder mixed with wastes is changed into the forms of Ca(OH)2 and Ca(HCO3)2, which results in decomposition of bad smell and extinction of harmful bacteria due to exothermic reaction and strong alkalization(pH12-13), respectively. |
