Improved precision and efficiency of a modified ORG0020 dynamic respiration test setup for compost stability assessment
Improved precision and efficiency of a modified ORG0020 dynamic respiration test setup for compost stability assessment
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改进的 ORG0020 动态呼吸测试装置用于堆肥稳定性评估的精度和效率得到提高
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发表时间：
2017
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通讯作者：
T. Aspray
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作者：
D. Ferrari;G. Howell;T. Aspray
与其他标准测试相比，ORG0020 动态呼吸测试可有效区分源头分离的有机废物衍生堆肥的各种稳定性；然而，使用原来的隔膜泵和歧管设置，测试会受到流速随时间和样品复制容器之间的变化的影响。在这里，我们演示了如何使用多通道蠕动泵向各个容器提供更一致的气流。使用来自不同地点、具有不同稳定性的成品和未成品工业堆肥样品，我们提供的证据表明，与原始设置相比，修改后的设置具有更高的精度。此外，气流调节需求的减少提高了运行成本效率，同时减少了劳动力需求。堆肥样品需氧量分析支持当前 25–75 mL min−1 的测试空气流量，尽管改进的空气流量控制将使未来缩小可接受的范围，以获得更好的实验室间性能。
The ORG0020 dynamic respiration test is effective at distinguishing source segregated organic waste derived composts across a wide range of stabilities when compared to other standard tests; however, using the original diaphragm pump and manifold setup, the test is affected by variability in flow rate with time and across sample replicate vessels. Here, we demonstrate the use of a multichannel peristaltic pump to deliver a more consistent air flow to individual vessels. Using finished and unfinished industry compost samples from different sites with varying stabilities, we provide evidence of greater precision of the modified setup compared to the original. Furthermore, the reduced need for air flow adjustment resulted in improved running cost efficiency with less labour demand. Analysis of compost sample oxygen demand supports the current test air flow rate of 25–75 mL min−1, although the improved air flow control will enable future narrowing of the acceptable range for better inter-laboratory performance.