Accelerated Composting of Grass Clippings By Controlling Moisture Level
Accelerated Composting of Grass Clippings By Controlling Moisture Level
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通过控制湿度加速草屑堆肥
DOI：
10.1177/0734242x9401200103
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发表时间：
1994
影响因子：
3.9
通讯作者：
H. Kubota
中科院分区：
文献类型：
--
作者：
K. Nakasaki;Nobuto Aoki;H. Kubota
使用自热填充床型实验室规模反应器对草屑进行堆肥，其中通过控制空气流量来维持所需的温度（60°C）。通过测量堆肥过程中 CO2 释放速率、碳转化率、水溶性有机物的 HPLC 模式以及堆肥固体中有机物成分浓度的变化，检查控制湿度水平对草屑堆肥的影响。与有机物分解总量相对应的二氧化碳释放速率和碳转化率的时间过程在控制不同湿度水平的实验中存在显着差异。草屑中有机物分解最快的湿度水平约为 50% (W/W)。水溶性有机物的 HPLC 模式和堆肥固体中有机物成分的浓度分析也表明，保持适当的水分水平可以加快堆肥速度。在 50% 湿度条件下，经过 194 小时的堆肥期，大约 75% 的纤维素材料（例如纤维素和半纤维素）被分解。观察到纤维素材料的分解速度相当快，这是草屑堆肥的特征。
Grass clippings were composted with an autothermal packed bed type laboratory-scale reactor in which a desired temperature (60°C) is maintained by controlling air flow rate. Effects of controlling moisture level on composting of grass clippings were examined by measuring changes in CO2 evolution rate, conversion of carbon, HPLC pattern of water soluble organic matter and concentrations of organic matter constituents in the composting solid, during the composting process. Time courses of CO2 evolution rate and conversion of carbon, corresponding to total amount of organic matter decomposed, differed substantially among the experimental runs with controlled different moisture levels. The moisture level yielding the most rapid decomposition of organic matter in the grass clippings was around 50% (W/W). Analyses of HPLC pattern of water soluble organic matter and concentrations of organic matter constituents in the composting solid also indicated that the composting rate could be accelerated by keeping the adequate moisture level. Approximately 75% of cellulosic materials such as cellulose and hemi-cellulose were decomposed during a 194 h composting period under 50% moisture conditions. Rather rapid decomposition of cellulosic materials, which is characteristic of the composting of grass clippings, was observed.