Mendez Lara, Sialve Bruno, Tomás-Pejó Elia, Ballesteros Mercedes, Steyer Jean Philippe, González-Fernández Cristina
IMDEA Energy, Avda. Ramón de la Sagra 3, 28935, Móstoles, Madrid, Spain.
INRA, UR0050, Laboratoire de Biotechnologie de l'Environnement, Avenue des Etangs, 11100, Narbonne, France.
Bioprocess Biosyst Eng. 2016 May;39(5):703-12. doi: 10.1007/s00449-016-1551-7. Epub 2016 Feb 2.
Anaerobic digestion of microalgae is hampered by its complex cell wall. Against this background, cyanobacteria cell walls render this biomass as an ideal substrate for overcoming this drawback. The aim of the present study was to compare the growth of two cyanobacteria (Aphanizomenon ovalisporum and Anabaena planctonica) and a microalga (Chlorella vulgaris) in urban wastewater when varying the temperature (22, 27 and 32 °C). Cyanobacterial optimal growth for both strains was attained at 22 °C, while C. vulgaris did not show remarkable differences among temperatures. For all the microorganisms, ammonium removal was higher than phosphate. Biomass collected was subjected to anaerobic digestion. Methane yield of C. vulgaris was 184.8 mL CH4 g COD in(-1) while with A. ovalisporum and A. planctonica the methane production was 1.2- and 1.4-fold higher. This study showed that cyanobacteria growth rates could be comparable to microalgae while presenting the additional benefit of an increased anaerobic digestibility.
微藻的厌氧消化受到其复杂细胞壁的阻碍。在此背景下，蓝细菌细胞壁使这种生物质成为克服这一缺点的理想底物。本研究的目的是比较两种蓝细菌（卵形鱼腥藻和浮游鱼腥藻）和一种微藻（普通小球藻）在城市废水中不同温度（22、27和32°C）下的生长情况。两种蓝细菌菌株的最佳生长温度均为22°C，而普通小球藻在不同温度下未表现出显著差异。对于所有微生物，氨的去除率高于磷。收集的生物质进行厌氧消化。普通小球藻的甲烷产量为184.8 mL CH4 g COD in(-1)，而卵形鱼腥藻和浮游鱼腥藻的甲烷产量分别高出1.2倍和1.4倍。这项研究表明，蓝细菌的生长速率可能与微藻相当，同时还具有提高厌氧消化率的额外优势。
