Department of Environmental and Natural Resources Management, University of Patras, G. Seferi 2, 301 00, Agrinio, Greece.
Institute of Chemical Engineering and High Temperature Chemical Processes (FORTH/ICE-HT), Stadiou Str., Platani, 265 04, Patras, Greece.
Environ Sci Pollut Res Int. 2018 Jun;25(18):17957-17966. doi: 10.1007/s11356-018-1989-z. Epub 2018 Apr 22.
A mixed cyanobacterial-mixotrophic algal population, dominated by the filamentous cyanobacterium Leptolyngbya sp. and the microalga Ochromonas (which contributed to the total photosynthetic population with rates of less than 5%), was studied under non-aseptic conditions for its efficiency to remove organic and inorganic compounds from different types of wastes/wastewaters while simultaneously producing lipids. Second cheese whey, poplar sawdust, and grass hydrolysates were used in lab-scale experiments, in photobioreactors that operated under aerobic conditions with different initial nutrient (C, N and P) concentrations. Nutrient removal rates, biomass productivity, and the maximum oil production rates were determined. The highest lipid production was achieved using the biologically treated dairy effluent (up to 14.8% oil in dry biomass corresponding to 124 mg L) which also led to high nutrient removal rates (up to 94%). Lipids synthesized by the microbial consortium contained high percentages of saturated and mono-unsaturated fatty acids (up to 75% in total lipids) for all the substrates tested, which implies that the produced biomass may be harnessed as a source of biodiesel.
一种混合的蓝藻-混养藻类群体，由丝状蓝藻 Leptolyngbya sp. 和微藻 Ochromonas 主导（它们对总光合群体的贡献小于 5%），在非无菌条件下进行了研究，以评估其从不同类型的废物/废水中去除有机和无机化合物的效率，同时生产脂质。在实验室规模的实验中使用了第二奶酪乳清、白杨木屑和草水解物，在好氧条件下、不同初始营养（C、N 和 P）浓度的光生物反应器中进行操作。确定了营养物去除率、生物量生产率和最大油脂产率。使用经过生物处理的乳制品废水（在干生物量中最高可达 14.8%的油脂，相当于 124mg/L）可实现最高的油脂产量，同时还可实现高营养物去除率（最高可达 94%）。微生物共混物合成的脂质在所有测试的基质中都含有高比例的饱和和单不饱和脂肪酸（总脂质中最高可达 75%），这意味着所产生的生物量可用作生物柴油的来源。
