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Analysis of volatile organic compounds in compost samples: A potential tool to determine appropriate composting time

文献类型： 外文期刊

作者： Zhu, Fengxiang 1 ; Pan, Zaifa 2 ; Hong, Chunlai 1 ; Wang, Weiping 1 ; Chen, Xiaoyang 1 ; Xue, Zhiyong 1 ; Yao, Yanlai 1 ;

作者机构： 1.Zhejiang Acad Agr Sci, Inst Environm Resource Soil & Fertilizer, Hangzhou 310021, Zhejiang, Peoples R China

2.Zhejiang Univ Technol, Coll Chem Engn & Mat Sci, Hangzhou 310014, Zhejiang, Peoples R China

关键词： Compost;Composting time;Volatile organic compounds;Pig manure;SPME;GC/MS

期刊名称：WASTE MANAGEMENT （ 影响因子：7.145； 五年影响因子：7.907 ）

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收录情况： SCI

摘要： Changes in volatile organic compound contents in compost samples during pig manure composting were studied using a headspace, solid-phase micro-extraction method (HS-SPME) followed by gas chromatography with mass spectrometric detection (GC/MS). Parameters affecting the SPME procedure were optimized as follows: the coating was carbon molecular sieve/polydimethylsiloxane (CAR/PDMS) fiber, the temperature was 60 degrees C and the time was 30 min. Under these conditions, 87 compounds were identified from 17 composting samples. Most of the volatile components could only be detected before day 22. However, benzenes, alkanes and alkenes increased and eventually stabilized after day 22. Phenol and acid substances, which are important factors for compost quality, were almost undetectable on day 39 in natural compost (NC) samples and on day 13 in maggot-treated compost (MC) samples. Our results indicate that the approach can be effectively used to determine the composting times by analysis of volatile substances in compost samples. An appropriate composting time not only ensures the quality of compost and reduces the loss of composting material but also reduces the generation of hazardous substances. The appropriate composting times for MC and NC were approximately 22 days and 40 days, respectively, during the summer in Zhejiang. (C) 2016 Elsevier Ltd. All rights reserved.

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