Greenhouse gas emissions from home composting of organic household waste
Greenhouse gas emissions from home composting of organic household waste
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DOI：
10.1016/j.wasman.2010.07.004
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发表时间：
2010-12-01
期刊：
影响因子：
8.1
通讯作者：
Scheutz, C.
中科院分区：
文献类型：
--
作者：
Andersen, J. K.;Boldrin, A.;Scheutz, C.
温室气体（GHG）的排放是家庭堆肥的潜在环境不利因素。由于缺乏可靠的温室气体排放数据，建立了一个全面的实验性家庭堆肥系统。该系统由6个堆肥单元组成，采用静态通量箱法对有机生活垃圾（OHW）堆肥一年的温室气体排放进行了测量和量化。六个堆肥单元中的平均OHW输入为2.6-3.5 kg/周，并且在所有情况下，堆肥单元内的温度仅比环境温度高几度（2-10 ℃）。甲烷（CH 4）和一氧化二氮（N2 O）的排放量被量化为0.4-4.2千克CH 4 Mg-1输入湿废物（ww）和0.30-0.55千克N2 O Mg-1 ww，取决于混合频率。这相当于100-239千克CO2当量的排放系数（仅包括CH 4和N2 O排放量）。MG-1 WW。堆肥单位暴露于每周混合有最高的EF，而没有混合在整个一年的单位有最低的排放量。除了经常混合的单位排放量较高之外，在混合过程中也会立即释放出甲烷，估计占甲烷总排放量的8-12%。OHW负荷较高的实验（每两周高达20公斤）需要更高的排放量和显着增加的总EF（千克物质每毫克-1湿重）。然而，温度发展没有显著变化。温室气体排放量（单位：千克CO2当量）Mg-1 ww）从家庭堆肥的OHW被发现是在同一数量级的集中堆肥厂。(C)2010爱思唯尔有限公司版权所有。
The emission of greenhouse gases (GHGs) is a potential environmental disadvantage of home composting. Because of a lack of reliable GHG emission data, a comprehensive experimental home composting system was set up. The system consisted of six composting units, and a static flux chamber method was used to measure and quantify the GHG emissions for one year composting of organic household waste (OHW). The average OHW input in the six composting units was 2.6-3.5 kg week and the temperature inside the composting units was in all cases only a few degrees (2-10 degrees C) higher than the ambient temperature. The emissions of methane (CH4) and nitrous oxide (N2O) were quantified as 0.4-4.2 kg CH4 Mg-1 input wet waste (ww) and 0.30-0.55 kg N2O Mg-1 ww, depending on the mixing frequency. This corresponds to emission factors (EFs) (including only CH4 and N2O emissions) of 100-239 kg CO2-eq. Mg-1 ww. Composting units exposed to weekly mixing had the highest EFs, whereas the units with no mixing during the entire year had the lowest emissions. In addition to the higher emission from the frequently mixed units, there was also an instant release of CH4 during mixing which was estimated to 8-12% of the total CH4 emissions. Experiments with higher loads of OHW (up to 20 kg every fortnight) entailed a higher emission and significantly increased overall EFs (in kg substance per Mg-1 ww). However, the temperature development did not change significantly. The GHG emissions (in kg CO2-eq. Mg-1 ww) from home composting of OHW were found to be in the same order of magnitude as for centralised composting plants. (C) 2010 Elsevier Ltd. All rights reserved.