Center for Environmental Remediation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China.
College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China.
Sensors (Basel). 2018 Nov 18;18(11):4017. doi: 10.3390/s18114017.
Oxygen is an important parameter for organic-waste composting, and continuous control of the oxygen in a composting pile may be beneficial. The oxygen consumption rate can be used to measure the degree of biological oxidation and decomposition of organic matter. However, without having a real-time online device to monitor oxygen levels in the composting pile, the adjustment and optimization of the composting process cannot be directly implemented. In the present study, we researched and developed such a system, and then tested its stability, reliability, and characteristics. The test results showed that the equipment was accurate and stable, and produced good responses with good repeatability. The equilibrium time required to detect oxygen concentration in the composting pile was 50 s, and the response time for oxygen detection was less than 2 s. The equipment could monitor oxygen concentration online and in real time to optimize the aeration strategy for the compost depending on the concentration indicated by the oxygen-measuring equipment.
氧气是有机废物堆肥的重要参数，连续控制堆肥中的氧气可能是有益的。耗氧率可用于测量有机物的生物氧化和分解程度。然而，如果没有实时在线设备来监测堆肥中的氧气水平，则无法直接进行堆肥过程的调整和优化。在本研究中，我们研究开发了这样一种系统，然后测试了它的稳定性、可靠性和特性。测试结果表明，该设备准确稳定，具有良好的重复性，响应良好。检测堆肥中氧气浓度所需的平衡时间为 50 秒，氧气检测的响应时间小于 2 秒。该设备可以在线实时监测氧气浓度，根据氧气测量设备指示的浓度优化堆肥的曝气策略。
