Song Bing, Manu M K, Li Dongyi, Wang Chen, Varjani Sunita, Ladumor Narsi, Michael Lui, Xu Yunjie, Wong Jonathan W C
Institute of Bioresource and Agriculture, Sino-Forest Applied Research Centre for Pearl River Delta Environment and Department of Biology, Hong Kong Baptist University, Hong Kong.
Institute of Bioresource and Agriculture, Sino-Forest Applied Research Centre for Pearl River Delta Environment and Department of Biology, Hong Kong Baptist University, Hong Kong; College of Land Science and Technology, China Agricultural University, Beijing 100193, China.
Bioresour Technol. 2021 Dec;341:125759. doi: 10.1016/j.biortech.2021.125759. Epub 2021 Aug 12.
Direct land application of food waste digestate (FWD) leads to 60-70% of nitrogen loss through NH volatilization due to its innate characteristics like high ammonium nitrogen (NH-N) (6000 mg/kg dry matter) and high moisture content (75%). Hence, bio stabilization of FWD through composting is a promising solution to curb the environmental and occupational hazards. Hence the aim of this study was to assess the feasibility of using sawdust and/or mature compost as a bulking agent to achieve effective composting. The results showed that mixing of FWD with sawdust alone or together with mature compost could produce quality compost with reduced NH-N (<700 mg/kg dry matter) and increased seed germination index (>80%) within 2 weeks of co-composting. Composting FWD with both sawdust and mature compost effectively reduced ~ 83% of NH volatilization demonstrating that this approach can effectively produce mature nitrogen enriched FWD compost.
由于食物垃圾沼渣（FWD）具有诸如高铵态氮（NH₄⁺-N）（约6000毫克/千克干物质）和高含水量（约75%）等固有特性，直接将其用于土地会导致60%-70%的氮通过NH₃挥发而损失。因此，通过堆肥对FWD进行生物稳定化处理是遏制环境和职业危害的一个有前景的解决方案。因此，本研究的目的是评估使用锯末和/或成熟堆肥作为膨松剂以实现有效堆肥的可行性。结果表明，在共堆肥2周内，单独将FWD与锯末混合或与成熟堆肥一起混合，能够生产出质量合格的堆肥，其中NH₄⁺-N含量降低（<700毫克/千克干物质），种子发芽指数提高（>80%）。将FWD与锯末和成熟堆肥一起进行堆肥有效地减少了约83%的NH₃挥发，表明这种方法能够有效地生产出成熟的富氮FWD堆肥。
