| 摘要 |
PROBLEM TO BE SOLVED: To provide a compounding agent capable of utilizing effectively iron phosphide isolated from slag, and to provide an algae field structure, a vegetation structure, and a method for producing a compounding agent.SOLUTION: A compounding agent includes a solid solution containing as main components, iron and iron phosphide obtained by being isolated by a sorting mechanism 18 from slag obtained by melting sewage sludge or night soil sludge by a melting facility 14, and is used as a supply source of an iron component and a phosphorus component which are necessary for rooting and growth of algae or aquatic plants, and is installed on an algae field, a revetment wall or the like as an algae field structure or a vegetation structure in which the compounding agent is carried on a structure so that a manuring effect can be controlled. |
