本文介绍并评述了化学降解、物理降解和生物降解等壳聚糖降解方法的研究进展。
In this paper, the advances in research of chemical degradation, physical degradation and biodegradation were discussed.
针对污水排放标准要求，选择合理的物理（油脂捕集器，气浮）分离、和生物（SBR）法降解相组合的污水处理工艺。
The reasonable wastewater treatment process which was combined by physical separating such as oil-fat captured reactor and air-floating and biological process(SBR) degradation.
肼类燃料在土壤环境中与粘土的作用最强，主要存在着物理吸附与化学降解两个方面。
It may be concluded that principal reactions between the hydrazine fuels and clay are physical absorption and chemical degradation.
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