低温催化剂基水热液化有害大型海藻水华，并通过微藻回收水相营养物。
Low-temperature catalyst based Hydrothermal liquefaction of harmful Macroalgal blooms, and aqueous phase nutrient recycling by microalgae.
机构信息
Department of Chemistry, Uttaranchal University, Dehradun, 248007, India.
Department of Life Sciences, Food Technology, Graphic Era Deemed to be University, Dehradun, 248001, India.
出版信息
Sci Rep. 2019 Aug 6;9(1):11384. doi: 10.1038/s41598-019-47664-w.
The present study investigates the hydrothermal liquefaction (HTL) of harmful green macroalgal blooms at a temperature of 270 °C with, and without a catalyst with a holding time of 45 min. The effect of different catalysts on the HTL product yield was also studied. Two separation methods were used for recovering the biocrude oil yield from the solid phase. On comparision with other catalyst, NaCO was found to produce higher yiled of bio-oil. The total bio-oil yield was 20.10% with NaCO, 18.74% with TiO, 17.37% with CaO, and 14.6% without a catalyst. The aqueous phase was analyzed for TOC, COD, TN, and TP to determine the nutrient enrichment of water phase for microalgae cultivation. Growth of four microalgae strains viz., Chlorella Minutissima, Chlorella sorokiniana UUIND6, Chlorella singularis UUIND5 and Scenedesmus abundans in the aqueous phase were studied, and compared with a standard growth medium. The results indicate that harmful macroalgal blooms are a suitable feedstock for HTL, and its aqueous phase offers a promising nutrient source for microalgae.
本研究在 270°C 的温度下，采用和不采用催化剂，保持 45 分钟，对有害绿藻水华进行水热液化 (HTL)。还研究了不同催化剂对 HTL 产物产率的影响。使用两种分离方法从固相中回收生物原油产率。与其他催化剂相比，发现 NaCO 产生更高的生物油产率。在有 NaCO、TiO、CaO 和无催化剂的情况下，总生物油产率分别为 20.10%、18.74%、17.37%和 14.6%。对水相进行 TOC、COD、TN 和 TP 分析，以确定水相的营养富集情况，用于微藻培养。研究了四种微藻菌株，即 Chlorella Minutissima、Chlorella sorokiniana UUIND6、Chlorella singularis UUIND5 和 Scenedesmus abundans 在水相中的生长情况，并与标准生长培养基进行了比较。结果表明，有害绿藻水华是 HTL 的合适原料，其水相为微藻提供了有前景的营养源。
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