In this study, mixed microalgal culture dominated by Chlorella vulgaris and Scenedesmus armatus was grown in Anaerobic Liquid Digestate (ALD) at different NaCl concentrations ranging between 0 and 100 mM. Highest lipid and carbohydrate amounts were observed as 38.4 and 36.2%, respectively, when the salinity was 50 mM NaCl. However, the protein content was drastically decreased to 12.8% with increased NaCl concentration. Furthermore, the algal biomass was subsequently decreased along with the total chlorophyll amount with increased NaCl concentration. Algal species showed diverse response to salinity stress and demonstrated a cost‐effective approach towards the cultivation of mixed microalgae within digestate and provided insight that ALD and/or other wastewaters can be diluted with seawater instead of tap water in the future studies. This study could be further converted into biofuels because of an increase in lipid content along with the digestate treatment, which will help to valorize ALD and bring into economy.

中文翻译：

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盐度对厌氧消化液中混合微藻生长的影响

在这项研究中，以小球藻和臭皮藻为主的混合微藻培养在厌氧液体消化液（ALD）中生长的NaCl浓度范围为0至100 mM。当盐度为50 mM NaCl时，最高脂质和碳水化合物含量分别为38.4％和36.2％。然而，随着NaCl浓度的增加，蛋白质含量急剧下降至12.8％。此外，随着NaCl浓度的增加，藻类生物量随总叶绿素含量而减少。藻类物种对盐分胁迫表现出不同的响应，并展示了一种在消化液中培养混合微藻的经济有效的方法，并提供了洞察力，可以在未来的研究中用海水代替自来水稀释ALD和/或其他废水。