The sidestreams produced during fish processing end in a separation tank where the resulting fractions follow biogas production or wastewater treatment. These streams can alternatively be used for production of protein-rich fungal biomass for e.g. fish feed applications, a product in increasing demand. These streams and upper streams originated during fish processing were used in this study for production of biomass using the edible filamentous fungus Rhizopus oryzae. The COD of the streams varied between 11 and 54 kg/m3 and, after fungal conversion of organic matter into protein-rich biomass and separation, a reduction of 34–69% was achieved. The stream origin had an effect on the final production and composition of the fungal biomass: 480 kg of biomass containing 33% protein per ton of COD were produced after cultivation in the separation tank streams, while 220 kg of biomass containing 62% protein per ton of COD were produced in upper sidestreams with lower amounts of suspended solids. Changing the initial pH (6.1–6.5) to 5.0 had a negative influence on the amount of biomass produced while medium supplementation had no influence. Thus, fish processing sidestreams can be diverted from biogas production and wastewater treatment to the production of protein-rich biomass for feed applications.

在鱼类加工过程中产生的侧流在分离罐中结束，在分离罐中产生的馏分经过沼气生产或废水处理。这些流可替代地用于生产富含蛋白质的真菌生物质，例如鱼饲料应用，这是一种需求不断增长的产品。在这些研究中，这些流和上游流是在鱼类加工过程中使用食用丝状真菌米根霉（Rhizopus oryzae）生产生物量的。溪流的化学需氧量在11至54 kg / m3之间变化，在将有机物由真菌转化为富含蛋白质的生物质并分离后，减少了34-69％。流的起源对真菌生物质的最终生产和组成有影响：在分离罐流中培养后，产生了480 kg的生物质，每吨COD含33％的蛋白质，而在上游侧流中产生的220 kg的生物质每吨COD含62％的蛋白质，悬浮固体含量较低。将初始pH值（6.1–6.5）更改为5.0对产生的生物量有负面影响，而添加培养基则没有影响。因此，鱼类加工的支流可以从沼气生产和废水处理转向生产富含蛋白质的生物质用于饲料。