Assemany Paula Peixoto, Calijuri Maria Lucia, do Couto Eduardo de Aguiar, Santiago Aníbal Fonseca, Dos Reis Alberto José Delgado
Avenida PH Rolfs, s/n, Campus Universitário, Department of Civil Engineering, Universidade Federal de Viçosa, Viçosa, 36570-900, Minas Gerais, Brazil E-mail:
National Laboratory of Energy and Geology, I.P. LNEG - Unidade de Bioenergia, Estrada do Paço do Lumiar, 22- Edifício F R/C, 1649-038, Lisbon, Portugal.
Water Sci Technol. 2015;71(8):1229-34. doi: 10.2166/wst.2015.087.
The production of different species of microalgae in consortium with other micro-organisms from wastewaters may represent an alternative process, to reduce the costs, for obtaining biofuels. The aim of this study was to evaluate the influence of pre-ultraviolet disinfection (UV) in the production of lipids from biomass produced in high rate ponds. Two high rate algal ponds were evaluated: a pond that received domestic sewage without disinfection and the other receiving domestic sewage previously disinfected by UV radiation (uvHRAP). The UV disinfection did not lead to significant differences in fatty acid profile and total lipid productivities, although it increased algal biomass concentration and productivity as well as lipid content. Moreover, the overall biomass concentrations and productivities decreased with the UV disinfection, mostly as a consequence of a loss in bacterial load. We thus conclude that uvHRAP disinfection may represent a potential strategy to promote the cleaner and safer growth of algal biomass when cultivated in consortium with other micro-organisms. Mainly regarding the use of wastewater as culture medium, together with a cheaper production of lipids for biodiesel, pre-disinfection may represent an advance since extraction costs could be significantly trimmed due to the increase in lipid content.
利用废水与其他微生物联合培养不同种类的微藻，可能是一种降低成本来获取生物燃料的替代方法。本研究的目的是评估预紫外线消毒（UV）对高速率池塘中生物质脂质生产的影响。评估了两个高速率藻塘：一个接收未经消毒的生活污水，另一个接收先前经紫外线辐射消毒的生活污水（uvHRAP）。紫外线消毒虽然提高了藻类生物质浓度、生产率以及脂质含量，但在脂肪酸谱和总脂质生产率方面并未导致显著差异。此外，紫外线消毒导致总体生物质浓度和生产率下降，主要是细菌数量减少的结果。因此，我们得出结论，uvHRAP消毒可能是一种潜在策略，当与其他微生物联合培养时，可促进藻类生物质更清洁、更安全地生长。主要考虑到将废水用作培养基，以及更廉价地生产用于生物柴油的脂质，预消毒可能是一种进步，因为脂质含量的增加可显著降低提取成本。
