Zhang Mengjie, Zhang Xiaoyan, Lin Hui, Zheng Huabao, Zhou Qifa
College of Life Sciences, Zhejiang University, Hangzhou, 310058, China.
State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China.
Heliyon. 2024 Jun 15;10(12):e32937. doi: 10.1016/j.heliyon.2024.e32937. eCollection 2024 Jun 30.
Food waste (FW) from large dining facility has been a pressing environmental challenge in China recently. This study developed an innovative species-specific feeding strategy for producing pigeon meat and excellent manure from FW. Adding FW to the feed of pigeons significantly increased their feed intake and promoted their growth although the pigeons showed a strong aversion to the FW. We produced a "super manure" with exceptionally high nitrogen (N) content (mean = 10.77 % on a dry basis, 8.04-12.57 %, = 264) by feeding slowly-growing pigeon species ( and ) with protein-high commercial feed and FW. A significant negative relationship between the N and carbon (C) contents in the pigeon manure was found, with C depletion higher than N depletion. Furthermore, the N content in the anaerobic composting (AnC) manure was 29.16 % higher than that in the FW. Fourier transform infrared (FT-IR) analysis and stable isotopes δC and δN in the manure clearly identified the transformations of nutrients during pigeon feeding and the AnC process. This study opens a path for producing N-high manure using protein-high food waste.
近期，大型餐饮设施产生的食物垃圾（FW）在中国已成为一项紧迫的环境挑战。本研究开发了一种创新的特定物种饲养策略，用于利用食物垃圾生产鸽肉和优质粪便。尽管鸽子对食物垃圾表现出强烈的厌恶，但在鸽子饲料中添加食物垃圾显著增加了它们的采食量并促进了生长。通过用高蛋白商业饲料和食物垃圾喂养生长缓慢的鸽种（和），我们生产出了一种氮（N）含量极高的“超级粪便”（干基平均含量为10.77%，8.04 - 12.57%，= 264）。研究发现鸽粪中的氮和碳（C）含量之间存在显著的负相关关系，碳的损耗高于氮的损耗。此外，厌氧堆肥（AnC）粪便中的氮含量比食物垃圾中的高29.16%。粪便的傅里叶变换红外（FT - IR）分析以及稳定同位素δC和δN清楚地确定了鸽子饲养和厌氧堆肥过程中养分的转化。本研究为利用高蛋白食物垃圾生产高氮粪便开辟了一条道路。
