School of Energy and Power Engineering, Jiangsu University, Jiangsu 212013, China.
State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
Bioresour Technol. 2020 Dec;317:123983. doi: 10.1016/j.biortech.2020.123983. Epub 2020 Aug 9.
Microalgae biofuels have received extensive attention as a new generation of renewable energy. However, the cost of cultivation and harvest limits the large-scale use of microalgae. An innovative method for harvesting microalgae through flocculation using kitchen wastewater (KWW) and further co-pyrolysis to enhance the crude bio-oil production was proposed. Flocculation efficiency of KWW for Scenedesmus obliquus showed the highest value of 94.09%. Compared with centrifugation and chemical flocculation (CF), the thermogravimetric curve of the sample after KWW flocculation showed different pattern. In addition, bio-oil yield of microalgae harvested through KWW flocculation was also the highest among the three studied harvest methods, reaching 55.59%. Gas chromatographic mass spectrometry (GC-MS) analysis of bio-oil showed that addition of KWW could promote the production of esters and hydrocarbons in comparison to the microalgae harvested by centrifugation or CF.
微藻生物燃料作为新一代可再生能源受到广泛关注。然而，培养和收获的成本限制了微藻的大规模使用。本研究提出了一种利用厨房废水（KWW）絮凝收获微藻，进一步共热解以提高粗生物油产量的创新方法。KWW 对斜生栅藻的絮凝效率最高，达到 94.09%。与离心和化学絮凝（CF）相比，KWW 絮凝后样品的热重曲线表现出不同的形态。此外，通过 KWW 絮凝收获的微藻的生物油产率在三种研究收获方法中也是最高的，达到 55.59%。生物油的气相色谱-质谱（GC-MS）分析表明，与通过离心或 CF 收获的微藻相比，添加 KWW 可以促进酯类和碳氢化合物的生成。
