The co-culture of microalgae and specific bacteria is conducive for improving wastewater treatment efficiency. In this study, native bacterial strains isolated from pig biogas slurry were screened for effective biogas slurry treatment when co-cultured with different microalgae. Scenedesmus obliquus and Bacillus megaterium (So-B) co-culture was found more efficient in treating high concentration biogas slurry compared with the pure microalgae culture. When the C/N/P ratio in biogas slurry was 106/16/1 and the initial microalgae-bacteria inoculation ratio was 9:1, the co-culture attained the maximum chemical oxygen demand (COD), total phosphorus (TP) and ammonia nitrogen (NH₄⁺-N) removal rates of 85.98 %, 81.03 % and 65.48 %, respectively. High C/N ratio was favorable for NH₄⁺-N removal by the co-culture. In addition, co-culture with bacteria markedly increased the ratio of saturated/unsaturated fatty acids in microalgae. These results suggest that the co-culture could efficiently reduce various nutrients in biogas slurry and simultaneously accumulate biomass with higher biofuel characteristics.

微藻类与特定细菌的共培养有利于提高废水处理效率。在这项研究中，从猪沼气浆液中分离的天然细菌菌株与不同的微藻共培养时，可以进行有效的沼气浆液处理。与纯微藻培养相比，斜生鹿角藻和巨大芽孢杆菌（So-B）共培养被发现在处理高浓度沼气浆液方面更为有效。当沼液中的C / N / P比为106/16/1并且初始微藻细菌接种比为9：1时，共培养达到了最大化学需氧量（COD），总磷（TP）和氨氮（NH ₄ ⁺-N）的去除率分别为85.98％，81.03％和65.48％。高C / N比有利于通过共培养去除NH ₄ ⁺ -N。另外，与细菌共培养显着增加了微藻中饱和/不饱和脂肪酸的比例。这些结果表明，共培养可以有效地减少沼液中的各种养分并同时积累具有更高生物燃料特性的生物质。