The relationship between substrate biodegradation and biomass growth is studied in the complete mixing activated sludge system when it is used to treat domestic seawater.

介绍了采用完全混合活性污泥系统处理含海水污水，研究了基质降解与生物增长量之间的关系。

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Then—alkanes with a complete range of carbon number are observed in the saturated hydrocarbons of the bitumen and no evidences of severe biodegradation occur.

这些沥青的饱和烃中正烷烃系列碳数分布完整，没有遭受过严重生物降解作用的迹象。

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PLA fiber is of starch of lactic acid as raw materials, to complete natural circular, has the biodegradation of fiber.

纤维是以淀粉制得之乳酸为原料，属于完成自然循环型，具有生物降解性的纤维。

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