Characterisation of organomineral fertilisers derived from nutrient-enriched biosolids granules
Characterisation of organomineral fertilisers derived from nutrient-enriched biosolids granules
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源自营养丰富的生物固体颗粒的有机矿物肥料的表征
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
R. Godwin
中科院分区：
文献类型：
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作者：
D. Antille;R. Sakrabani;S. Tyrrel;M. S. Le;R. Godwin
将尿素和钾肥包覆在生物固体颗粒上，制成有机无机肥。研制了两种N- ： -P_2O_5- ： -K_2O配方：10 ： 4 ： 4(OMF10)和15 ： 4 ： 4(OMF15)。对四批OMF和生物固体颗粒进行了常规化肥分析，并与尿素样本进行了比较，以确定影响处理和铺展、土壤行为和化肥价值的材料的关键物理和化学性质。堆密度和颗粒密度分别在608到618 kg m−3和1297到1357 kg m−3的范围内。压缩试验表明，当施加垂直载荷时，OMF颗粒经历了变形，随后发生多次破坏，颗粒没有解体。根据颗粒直径的不同，颗粒的静态强度在1.18~4.33 N mm−2之间。使用肥料颗粒分布模型研究表明，有机肥颗粒的直径应在1.10至5.5 mm之间，其中约80%的颗粒在2.25至4.40 mm的范围内，以便能够在18 m的有轨电车间距下使用。这项研究利用新技术来提高生物固体的化肥价值，降低处理成本，并提供与回收相关的一系列环境效益。
Organomineral fertilisers (OMFs) were produced by coating biosolids granules with urea and potash. Two OMF formulations with N : P2O5 : K2O compositions: 10 : 4 : 4 (OMF10) and 15 : 4 : 4 (OMF15) were developed for application in grassland and arable crops. Routine fertiliser analyses were conducted on four batches of OMF and biosolids granules and compared with a sample of urea to determine key physical and chemical properties of the materials which affect handling and spreading, soil behaviour, and fertiliser value. Bulk and particle densities were in the range of 608 to 618 kg m−3, and 1297 to 1357 kg m−3, respectively. Compression tests showed that OMF particles undergo deformation followed by multiple failures without disintegration of the granules when vertical load was applied. Static particle strength was between 1.18 and 4.33 N mm−2 depending on the particle diameter. The use of a model for fertiliser particle distribution studies showed that OMF granules should be between 1.10 and 5.50 mm in diameter with about 80% of the particles in the range of 2.25 to 4.40 mm to enable application at 18 m tramline spacing. This research utilises novel technology to improve the fertiliser value of biosolids, reduce disposal costs, and deliver a range of environmental benefits associated with recycling.