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磷肥通常来源于磷酸盐岩 ,但是日本污水管理局和三机工程公司发现污水污泥焚烧处理产生的灰 ,磷酸盐却可富集到 2 0 %～ 30 %的含量。这两个合伙者已开发出一种方法 ,是将污水污泥焚烧灰与含碳酸镁和碳酸钙的白云石等矿物混合。调整成分配比使得到的混合物中ｍ(Ｐ2 Ｏ5) :ｍ(Ｃ
Phosphate fertilizer is usually derived from phosphate rock, but the Japanese Sewage Authority and the Sanji Engineering Company found that ash and phosphate from sewage sludge incineration can be enriched to 20% to 30%. The two partners have developed a method of mixing sewage sludge incineration ash with minerals such as dolomite containing magnesium carbonate and calcium carbonate. Adjusted to make the ratio of the mixture obtained m (P2 O5): m (C