An improved mechanical separator for removing live worms from worm-worked organic wastes

J.S. Price, V.R. Phillips
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引用次数: 12

Abstract

Vermicomposting has the potential to convert many organic wastes into useful plant growth media. However, the rotary screens previously employed to separate worms from vermicompost often became blinded, making worm separation slow and inefficient. An improved method was required. An experimental machine employing a novel combing action to achieve separation was therefore constructed and tested. The comb-type mechanical separator was shown to be effective with vermicomposts which were well-worked and had moisture contents of 80% wet basis or less. For example, using well-worked vermicompost derived from separated cattle solids and containing approximately 5 kg of worms/m3 and with a moisture content (wet basis) of 75%, a throughput of 1·5 m3/h of vermicompost was possible, with a separation efficiency of 95%. Vermicomposting beds are sometimes maintained at moisture contents higher than 80% wet basis, and the degree of worm-working achieved can vary. Further work is therefore required to assess the performance of the comb-type separator over a wider range of conditions.

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一种用于从蠕虫加工的有机废物中去除活蠕虫的改进机械分离器
蚯蚓堆肥有可能将许多有机废物转化为有用的植物生长介质。然而,以前用于从蠕虫堆肥中分离蠕虫的旋转筛经常是盲目的,使得蠕虫分离缓慢且效率低下。需要一种改进的方法。因此,构建并测试了采用新型精梳动作实现分离的实验机器。梳式机械分离机对处理良好且含水量在80%以下的蚯蚓堆肥具有较好的分离效果。例如,使用从分离的牛固体中提取的加工良好的蚯蚓堆肥,含有约5千克蠕虫/立方米,含水量(湿基)为75%,蚯蚓堆肥的吞吐量可能为1.5立方米/小时,分离效率为95%。蚯蚓堆肥床有时保持水分含量高于80%湿基,蚯蚓工作的程度可以有所不同。因此,需要进一步的工作来评估梳式分离器在更广泛的条件下的性能。
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