Consortium on Health, Environment, Education and Research (CHEER), Department of Science and Environmental Studies, Education University of Hong Kong, Tai Po, Hong Kong.
Consortium on Health, Environment, Education and Research (CHEER), Department of Science and Environmental Studies, Education University of Hong Kong, Tai Po, Hong Kong; Department of Science, School of Science and Technology, The Open University of Hong Kong, Hong Kong, China.
Environ Pollut. 2020 Jan;256:113380. doi: 10.1016/j.envpol.2019.113380. Epub 2019 Oct 11.
Two farmed freshwater fish species Nile tilapia (Oreochromis niloticus) and jade perch (Scortum barcoo) were cultured with food waste-based diets and compared with commercial formulated control diet for a period of six months. Sixteen priority polycyclic aromatic hydrocarbons (PAHs) in the diets and cultured fish meat were tested by gas chromatography-mass spectrometry. No significant differences of ∑PAHs were observed between Nile tilapia and jade perch fed with food waste-based diets and control diet (p > 0.05). However, there were significantly higher concentration of ∑PAHs in market fish compared with the same species of fish fed by food waste-based diets (p < 0.05). Thus, the food waste-based diets have a potential to lower the PAH concentrations in farmed fish when compared with market fish. Based on the PAH concentrations, a human health risk assessment was made. The results indicated there were no non-cancer and very low cancer risks of consuming fish cultured with food waste-based diets at the 95th centile (Nile tilapia: hazard index (HI ) = 0.343 × 10, HI = 0.614 × 10 and cancer risk value = 0.943 × 10; jade perch: HI = 0.456 × 10, HI = 0.814 × 10 and cancer risk value = 0.291 × 10). In general, the fish fed with food waste-based diets were unlikely to cause adverse health effects, based on the concentrations of PAHs. There is great potential for using food waste-based diets as an alternative to commercial feeds for cultivating freshwater fish.
两种养殖淡水鱼类，尼罗罗非鱼（Oreochromis niloticus）和碧玉鲈（Scortum barcoo），用基于食物垃圾的饲料进行养殖，并与商业配方对照饲料进行了为期六个月的比较。采用气相色谱-质谱法测试了饲料和养殖鱼肉中的 16 种优先多环芳烃（PAHs）。用基于食物垃圾的饲料喂养的尼罗罗非鱼和碧玉鲈与对照饲料之间，∑PAHs 没有显著差异（p > 0.05）。然而，市场鱼类中的∑PAHs 浓度明显高于用基于食物垃圾的饲料喂养的同种鱼类（p < 0.05）。因此，与市场鱼类相比，基于食物垃圾的饲料有可能降低养殖鱼类中的 PAH 浓度。基于 PAH 浓度，进行了人类健康风险评估。结果表明，食用用基于食物垃圾的饲料养殖的鱼类，在 95%百分位数时，没有非癌症和非常低的癌症风险（尼罗罗非鱼：危害指数（HI）=0.343×10，HI=0.614×10 和癌症风险值=0.943×10；碧玉鲈：HI=0.456×10，HI=0.814×10 和癌症风险值=0.291×10）。一般来说，基于 PAH 的浓度，食用基于食物垃圾的饲料喂养的鱼类不太可能对健康产生不利影响。用基于食物垃圾的饲料替代商业饲料来养殖淡水鱼类具有很大的潜力。
