The limiting factor is micro organism metabolization in cell level if the trends of DO and OUR are inverse, whereas the restricted factor is oxygen transfer in engineering level ...

• 当DO与OUR的趋势具有相反性,表明限制因素为细胞水平的菌体代谢问题;若DO与OUR的趋势具有同一性,限制性因素为工程水平的氧传递因素,表明溶氧处于临界氧以下。