Investigation of the direct utilization possibility of methane fermentation residue sludge as liquid fertilizer by micronization
Investigation of the direct utilization possibility of methane fermentation residue sludge as liquid fertilizer by micronization
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DOI：
10.1080/09593330.2021.2020908
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发表时间：
2021-12
影响因子：
2.8
通讯作者：
Takamasa Mori;Kotaro Murakami;M. Yabe
中科院分区：
文献类型：
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作者：
Takamasa Mori;Kotaro Murakami;M. Yabe
摘要为了建设可持续发展的社会，将有机废弃物作为一种物质资源进行再利用是至关重要的。因此，本文的目标是通过球磨和高速搅拌将甲烷发酵残渣污泥粉碎，直接作为液体肥料利用。通过球磨和高速搅拌，污泥中的固体颗粒可小于100µm，对应于臂架喷雾器的喷嘴直径；球磨1h以上，大于100µm的粗粒率下降幅度不超过10%。此外，污泥中的磷酸盐离子浓度随着污泥中固体粒径的减小而增加，这主要是由于其比表面积的增加。进一步研究了不同实验条件对球磨效率的影响。结果表明，球磨机粉碎污泥中的软固颗粒时，总介质球与污泥的体积比、球与污泥的总体积、内罐容积应较大，转速与临界转速的比值应与无机颗粒粉碎报道中所报道的基本一致，才能达到有效粉碎。图形抽象
ABSTRACT For establishing a sustainable society, it is crucial to reuse the organic waste as a material resource. Therefore, herein, we aim to pulverize the methane fermentation residue sludge by ball milling and high-speed agitation to directly utilize it as a liquid fertilizer. The solid particles in the sludge can be below 100 µm, corresponding to the nozzle diameter of the boom sprayer by both ball milling and high-speed agitation; when ball milling was carried out for at least 1 h, the ratio of coarse particles larger than 100 µm decreased by less than 10%. In addition, the phosphate-ion concentration in the sludge increased with a decrease in the particle size of solid in the sludge mainly due to increase in its specific surface area. Furthermore, we investigated the effects of various experimental conditions for ball milling on the pulverization efficiency. Results suggests that for grinding the soft solid particles in the sludge by ball milling, the volume ratio of the total medium balls and sludge, total volumes of the balls and sludge, and inner pot volume should be larger, while the ratio of the rotation speed to the critical rotation speed should be almost the same as those reported previously in the reports on grinding of inorganic particles to attain an effective pulverization. GRAPHICAL ABSTRACT