The natural shale was made into good performance ceramsite filter by ball making, and breaking processes.

以天然页岩为原料,分别采用破碎法和成球法制成滤料生料,经焙烧, 膨胀,制备了陶粒滤料.

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Sludge reduction performance by earthworm biofilters using quartz sand and ceramsite as media was compared.

比较了石英砂和陶粒滤料蚯蚓生物滤池的污泥减量化效果.

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