Department of Environmental Sciences, University of Helsinki, Niemenkatu 73, 15140 Lahti, Finland.
Department of Environmental Sciences, University of Helsinki, Niemenkatu 73, 15140 Lahti, Finland.
Bioresour Technol. 2017 Aug;238:205-213. doi: 10.1016/j.biortech.2017.04.013. Epub 2017 Apr 7.
Growth and fatty acid production of microalga Selenastrum sp. with associated bacteria was studied in lab-scale experiments in three composting leachate liquids. Nutrient reduction in cultures was measured at different initial substrate strengths. A small, pilot-scale photobioreactor (PBR) was used to verify lab-scale results. Similar growth conditions supported growth of both Selenastrum and bacteria. CO feed enhanced the production of biomass and lipids in PBR (2.4gL and 17% DW) compared to lab-scale (0.1-1.6gL and 4.0-6.5% DW) experiments. Also prolonged cultivation time increased lipid content in PBR. At both scales, NH-N with an initial concentration of ca. 40mgL was completely removed from the biowaste leachate. In lab-scale, maximal COD reduction was over 2000mgL, indicating mixotrophic growth of Selenastrum. Co-cultures are efficient in composting leachate liquid treatment, and conversion of waste to biomass is a promising approach to improve the bioeconomy of composting plants.
研究了与相关细菌共生的微藻小球藻在三种堆肥渗滤液中的实验室规模实验中的生长和脂肪酸生产。在不同的初始基质强度下测量了培养物中的养分减少。一个小型的中试光生物反应器（PBR）用于验证实验室规模的结果。相似的生长条件支持小球藻和细菌的生长。与实验室规模（0.1-1.6 gL 和 4.0-6.5% DW）相比，CO 进料在 PBR 中（2.4 gL 和 17% DW）提高了生物量和脂质的产量。此外，延长培养时间也增加了 PBR 中的脂质含量。在两个规模上，初始浓度约为 40mgL 的 NH-N 都从生物废物渗滤液中完全去除。在实验室规模下，最大 COD 减少量超过 2000mgL，表明小球藻是混养生长。共培养物在堆肥渗滤液处理中非常有效，将废物转化为生物质是提高堆肥厂生物经济的一种有前途的方法。
