从食物垃圾厌氧消化物中增强营养物质的回收。
Enhancing nutrient recovery from food waste anaerobic digestate.
机构信息
UWA School of Agriculture and Environment, The University of Western Australia, Perth, WA 6009, Australia; Cooperative Research Centre for High Performance Soil, Newcastle, Callaghan, NSW, 2308, Australia; The UWA Institute of Agriculture, The University of Western Australia, Perth, WA 6001, Australia.
UWA School of Agriculture and Environment, The University of Western Australia, Perth, WA 6009, Australia; The UWA Institute of Agriculture, The University of Western Australia, Perth, WA 6001, Australia; Richgro Garden Products, 203 Acourt Rd, Jandakot, WA 6164, Australia.
出版信息
Bioresour Technol. 2023 Dec;390:129869. doi: 10.1016/j.biortech.2023.129869. Epub 2023 Oct 14.
The study synthesised the raw liquid fraction of digestate into a nutrient rich solid digestate through acidification whilst preventing nitrogen loss through ammonium volatilisation during evaporation. To stabilise ammonium in the digestate, it was acidified with sulphuric, nitric, and phosphoric acid to produce solid digestate with ammonium sulphate, ammonium nitrate and ammonium phosphate, respectively. These treatments were compared against urea ammonium nitrate, raw digestate, and unacidified solid digestate. To evaluate the effect of these transformed digestate products in soil, a plant growth experiment (Kikuyu; Cenchrus clandestinus) was conducted, and characterised, plant growth, soil chemistry, and rhizosphere bacterial communities. Plant growth was enhanced by all digestate treatments compared to control and urea ammonium nitrate. Ammonium phosphate solid digestate plant growth was significantly higher than all other acidified treatments due to the high P content. Moreover, digestate-amended soil had elevated Proteobacteria and putative denitrification genes.
本研究通过酸化将消化液的原始液态部分转化为营养丰富的固态消化液，同时防止在蒸发过程中通过氨挥发造成氮损失。为了稳定消化液中的铵，使用硫酸、硝酸和磷酸将其酸化，分别产生硫酸铵、硝酸铵和磷酸铵形式的固态消化液。将这些处理方法与尿素硝铵、原始消化液和未酸化的固态消化液进行了比较。为了评估这些转化后的消化液产物对土壤的影响，进行了一项植物生长实验（肯塔基百慕大草；Cenchrus clandestinus），并对植物生长、土壤化学和根际细菌群落进行了特征分析。与对照和尿素硝铵相比，所有消化液处理均促进了植物生长。由于高磷含量，磷酸铵形式的固态消化液的植物生长显著高于所有其他酸化处理。此外，添加消化液的土壤中富含变形菌门和可能的反硝化基因。
Zotero 插件