Cheng Zhang, Lam Cheung-Lung, Mo Wing-Yin, Nie Xiang-Ping, Choi Wai-Ming, Man Yu-Bon, Wong Ming-Hung
College of Resources and Environment, Sichuan Agricultural University, Chengdu, China.
Consortium on Health, Environment, Education and Research (CHEER), and Department of Science and Environmental Studies, Hong Kong Institute of Education, Tai Po, Hong Kong, China.
Environ Sci Pollut Res Int. 2016 Apr;23(8):7195-203. doi: 10.1007/s11356-016-6484-9. Epub 2016 Mar 22.
The major purpose of this study was to use different types of food wastes which serve as the major sources of protein to replace the fish meal used in fish feeds to produce quality fish. Two types of food waste-based feed pellets FW A (with cereals) and FW B (with cereals and meat products) and the commercial feed Jinfeng® were used to culture fingerlings of three low-trophic-level fish species: bighead carp, grass carp, and mud carp (in the ratio of 1:3:1) for 1 year period in the Sha Tau Kok Organic Farm in Hong Kong. Heavy metal concentrations in all of the fish species fed with food waste pellets and commercial pellets in Sha Tau Kok fish ponds were all below the local and international maximum permissible levels in food. Health risk assessments indicated that human consumption of the fish fed with food waste feed pellets was safe for the Hong Kong residents. The present results revealed that recycling of food waste for cultivating low-trophic-level fish (mainly herbivores and detritus feeders) is feasible, and at the same time will ease the disposal pressure of food waste, a common problem of densely populated cities like Hong Kong.
本研究的主要目的是利用不同类型的食物垃圾（其作为蛋白质的主要来源）来替代鱼饲料中使用的鱼粉，以生产优质鱼类。两种基于食物垃圾的饲料颗粒——FW A（含谷物）和FW B（含谷物和肉类产品）以及商业饲料金凤®，被用于在香港沙头角有机农场养殖三种低营养级鱼类的鱼苗：鳙鱼、草鱼和鲮鱼（比例为1:3:1），为期1年。在沙头角鱼塘中，用食物垃圾颗粒饲料和商业颗粒饲料喂养的所有鱼类中的重金属浓度均低于当地和国际食品中的最大允许水平。健康风险评估表明，香港居民食用用食物垃圾颗粒饲料喂养的鱼是安全的。目前的结果表明，将食物垃圾回收用于养殖低营养级鱼类（主要是食草动物和碎屑摄食者）是可行的，同时将缓解食物垃圾的处置压力，这是像香港这样人口密集城市的一个常见问题。
