水热氧化法回收污泥氮磷用于培养产油栅藻

Recovering nitrogen and phosphorus from sludge by hydrothermal oxidation to cultivate oil producing Scenedesmus obliquus

为了有效提取污泥中的营养,并使栅藻达到较高的产油量,采用水热氧化法处理污泥,并对污泥氧化液制成的培养基进行稀释。结果表明:在126℃下,投加0.2mol/L的氧化剂(过硫酸钾)对污泥进行水热氧化可以将其中超过90%的氮磷转移至液相;直接使用水热氧化的液相产物培养斜生栅藻,得到的藻产量和产油量都很低,但液相产物经过10倍稀释后,培养的栅藻在产油量上超过了传统BG11培养基,提高了63%。

In order to effectively extract nutrients from sludge and obtain a higher oil yield of Scenedesmus obliquus,the hydrothermal oxidation method was adopted to treat sludge,and the culture medium made from the sludge oxidation solution was diluted.The results showed that more than 90%of nitrogen and phosphorus in sludge could be transferred into the liquid phase by adding 0.2 mol/L oxidant(potassium persulfate)at 126℃;the algae and oil yields of oil producing Scenedesmus obliquus directly cultured in original liquid products of hydrothermal oxidation were very low,while,the oil yield of Scenedesmus obliquus cultured in liquid products diluted 10 times was 63%higher than that in conventional BG11 medium.