异味是使用再循环水产养殖系统(RAS)的公司面临的主要挑战。在提交的作品中,我们全面表征了在RAS中饲养的尼罗罗非鱼(Oreochromisniloticus)的气味成分,并比较了两种净化过程对鱼类气味成分和香气特征的影响。研究了从生产罐收集的鱼以及在净化过程中两种不同的罐预消毒方法(高pH值与H2O2)之后的鱼。感官仪器联合调查显示存在115种气味,其中83人被成功识别。化合物癸醛,十三烷酸,(Z)-1,5-八丁-3-一,辛烷-2,3-二酮,二苯甲酮,non-3-yn-1-ol,γ-十二内酯,(Z)-香叶基丙酮,2,3-二乙基-5-甲基吡嗪,1-甲基吡咯烷-2-酮,2-乙酰基-2-噻唑啉,苯并噻唑,skatole,和5α-雄激素-16-en-3-酮被检测到具有最高的风味稀释因子,并首次被描述为RAS鱼中的气味活性化合物。结果表明,净化降低了鱼类中78种不同气味物质的含量,包括强烈的土质气味气味物质地质蛋白,异冰片和2,3-二乙基-5-甲基吡嗪。
Off-flavors are a major challenge for companies using recirculated aquaculture systems (RAS). In the presented work, we comprehensively characterize the odorant composition of Nile tilapia (Oreochromis niloticus) raised in RAS and compare the impact of two depuration processes on the odorant composition and aroma profile of the fish. Fish collected from the production tank and after two different tank pre-disinfection approaches in the depuration process (high pH versus H2O2) were investigated. A combined sensory-instrumental investigation revealed the presence of 115 odorants, of which 83 were successfully identified. The compounds decanal, tridecanal, (Z)-1,5-octadien-3-one, octane-2,3-dione, benzophenone, non-3-yn-1-ol, γ-dodecalactone, (Z)-geranylacetone, 2,3-diethyl-5-methylpyrazine, 1-methylpyrrolidin-2-one, 2-acetyl-2-thiazoline, benzothiazole, skatole, and 5α-androst-16-en-3-one were detected with the highest flavor dilution factors and are described for the first time as odor-active compounds in fish from RAS. The results indicate that depuration decreased the levels of 78 different odorants from the fish, including the potent earthy smelling odorants geosmin, isoborneol and 2,3-diethyl-5-methylpyrazine.