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, China.
Gujarat Pollution Control Board, Gandhinagar 382010, Gujarat, India.
Bioresour Technol. 2022 Sep;359:127465. doi: 10.1016/j.biortech.2022.127465. Epub 2022 Jun 11.
Composting of food waste digestate (FWD) is challenging as it requires more bulking agents, and the nitrogen loss is inevitable. To address these issues, FWD composting was conducted at a relatively lower C/N ratio of 15 with zeolite amendment in the dosage range of 5-15%. The impact of zeolite addition on nitrogen loss, NH and NO emissions was assessed during FWD composting. The results showed that the addition of 10-15% zeolite could significantly reduce the phytotoxic nature of FWD and the compost maturity level could be reached in 10-21 days. Furthermore, ∼45% total nitrogen loss could be reduced by mitigating NH and NO emissions upon 10 and 15% zeolite amendment. The outcome of the present study could be used as an effective strategy for composting FWD in any part of the world as the FWD characteristics are similar irrespective of the type of food waste.
厨余垃圾消化物（FWD）的堆肥具有挑战性，因为它需要更多的膨松剂，而且氮的损失是不可避免的。为了解决这些问题，在相对较低的 C/N 比 15 下进行了 FWD 堆肥，并在 5-15%的剂量范围内添加沸石作为改良剂。评估了沸石添加对 FWD 堆肥过程中氮损失、NH 和 NO 排放的影响。结果表明，添加 10-15%的沸石可以显著降低 FWD 的植物毒性，并且在 10-21 天内可以达到堆肥成熟度水平。此外，通过减轻 10%和 15%沸石添加时的 NH 和 NO 排放，可减少约 45%的总氮损失。本研究的结果可作为在世界任何地方进行 FWD 堆肥的有效策略，因为无论食品废物的类型如何，FWD 的特性都相似。
