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".
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bio-solids 生物固形物
N-PLURAL semisolid or solid organic material obtained from the recycling of sewage, used esp as a fertilizer 生物固体; 从下水道污泥回收而来的半固体或固体物质，被用来做化肥
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