N a layer of sand or gravel used to expose sewage effluent, in its final stages, to air and the action of microorganisms 细菌滤床 → compare filter bed
The cone bacteria bed resembles cone-incone in morphology, but it is neither product of diagenesis nor sedimentary structure.
该“锥状菌层”的外形特征与叠锥极为相似，但它不属于成岩作用的产物，也不是沉积构造特征。
These expanded granular sludge bed (EGSB) reactors rely on the bacteria staying in the tank but high-solid waste would push them out.
这些膨胀颗粒污泥床（EGSB）反应容器依靠里面容纳的细菌，不过高固体含量的废弃物会把细菌排出容器。
Most are microbes of bacteria, though there are also worms burrowing into the sea bed and ocean insects less than 1mm long.
它们中的大部分属于细菌，但有也有一些是在海床中挖掘的蠕虫，或是体长小于1 mm的海洋昆虫。
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