AGRICULTURAL DRAINAGE PURIFICATION SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide an agricultural drainage purification system, which is high in treating efficiency even for the agricultural drainage which is relatively low in phosphorus content as the agricultural drainage. SOLUTION: A reservoir part is provided in a drainage passage of an agricultural drainage, and a drainage purification method is provided by crystallizing dephosphorization method. The drainage purification means is preferably a calcium-based compound immersed in the reservoir part.