Intensive aquaculture production generates large amounts of sludge. This waste could be considered as a potential source of nutrients that can be recovered and utilized. Little attention has been paid to nutrient recovery from fish sludge. In this study, bioconversion of sludge was evaluated in lab scale under anaerobic (AN), facultative anaerobic (FA) and aerobic (AE) conditions. After 40 days of fermentation, AN recovered the highest values of dissolved total nitrogen (82.7 mg L), while AE showed the highest dissolved total phosphorus (11.8 mg L) and the highest reduction of total suspended solids (36.0 %). Microbial analysis showed that AN exhibited a distinct bacterial community than that of FA and AE. Furthermore, grown in AN effluents collected after 12 days of fermentation achieved the highest biomass production (1.96 g L). These results suggest that AN has the best potential to recover nutrients from sludge for production of .

中文翻译：

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从鱼污泥中回收营养物质以促进微藻 Chlorella sorokiniana CMBB276 的生长

集约化水产养殖生产产生大量污泥。这种废物可以被视为可以回收和利用的潜在营养来源。人们很少关注鱼污泥中的营养物回收。在这项研究中，在实验室规模的厌氧（AN）、兼性厌氧（FA）和好氧（AE）条件下对污泥的生物转化进行了评估。发酵40天后，AN恢复了最高的溶解性总氮（82.7 mg·L），而AE则显示出最高的溶解性总磷（11.8 mg·L）和最高的总悬浮固体减少量（36.0%）。微生物分析表明，AN 表现出与 FA 和 AE 不同的细菌群落。此外，在发酵 12 天后收集的 AN 流出物中生长，实现了最高的生物量产量（1.96 g L）。这些结果表明，AN 具有从污泥中回收营养物质以生产 的最佳潜力。