By the time the Ocean Dumping Act took effect, there were companies waiting to convert municipal "bio-solids" into an "effective soil conditioner and natural fertilizer".
海洋倾废法生效后，就有公司等待着将城市“生物固体”转换成为“有效的土壤改良剂和天然肥料”。
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Rice Husk Ash have high silica (SiO2) can be used as raw material in Ceramic Tiles, Replace Cement, Produce Precipitated silica, and raw material for fertilizer and soil conditioner.