Observations of production and emission of greenhouse gases and ammonia during storage of solids separated from pig slurry: Effects of covering
Observations of production and emission of greenhouse gases and ammonia during storage of solids separated from pig slurry: Effects of covering
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DOI：
10.1016/j.atmosenv.2006.02.013
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发表时间：
2006-07-01
影响因子：
5
通讯作者：
Sommer, S. G.
中科院分区：
文献类型：
--
作者：
Hansen, M. N.;Henriksen, K.;Sommer, S. G.
泥浆的分离产生固体部分，该固体部分在用作作物生产中的肥料之前储存在粪肥堆中。在储存期间可能会排放大量的氨（NH3）和温室气体，这具有有害的环境影响。预计排放水平取决于储存的大量粪肥内部的氧化水平，因此也取决于储存条件。因此，建立了一个实验，以研究在存储的固体部分的气体排放量，以及对NH3和各种温室气体的排放量的粪肥堆的氧化的影响。NH3和温室气体甲烷（CH 4），一氧化二氮（N2 O），二氧化碳（CO2）的排放量进行了比较，从一个未覆盖的和覆盖的一堆从猪泥浆中分离的固体，并与内的氧合水平的粪堆。当分离出的固体不加遮盖地储存时，约有15%的初始氮含量损失。在初始氮含量中，4.8%以N2 O形式损失，0.3%以NH3形式损失，而9.6%的未计损失假定为二氮（N-2）。在最初的碳含量中，28%在无遮盖的储存过程中损失;其中大部分以CO2的形式排放（25%），而1.3%以CH 4的形式排放。堆内的氧化水平被发现会影响温室气体的产生和排放。用密封材料覆盖粪堆延迟了大部分储存粪肥的通风，这减少了内部热量的产生，有机物的降解以及NH3和温室气体的排放。NH3，N2 O，和CH 4的排放量分别减少了12%，99%和88%，当粪堆覆盖有密闭材料。(c)2006爱思唯尔有限公司保留所有权利。
Separation of slurry produces a solid fraction that is stored in manure heaps before being used as a fertiliser in crop production. Considerable amounts of ammonia (NH3) and greenhouse gases may be emitted during storage, which has deleterious environmental effects. The emission levels can be expected to depend on oxygenation level inside the bulk of the stored manure and therefore on storage conditions. An experiment was thus set up to study gaseous emissions during storage of the solid fraction, and the effects of the oxygenation of manure heaps on emissions of NH3 and various greenhouse gases. Emissions of NH3 and the greenhouse gases methane (CH4), nitrous oxide (N2O), and carbon dioxide (CO2) from an uncovered and covered heap of solids separated from pig slurry were compared, and related to the oxygenation level inside the manure heap. Approximately 15% of the initial nitrogen content was lost when separated solids were stored uncovered. Of the initial nitrogen content, 4.8% was lost as N2O, 0.3% was lost as NH3, while the 9.6% unaccounted for was assumed lost as dinitrogen (N-2). Of the initial carbon content, 28% was lost during uncovered storage; the majority of this was emitted as CO2 (25%), while 1.3% was emitted as CH4. Oxygenation level inside the heap was found to influence the production and emission of greenhouse gases. Covering the heap with an airtight material delayed aeration of the bulk of the stored manure, which reduced the internal heat production, degradation of organic matter, and emission of NH3 and greenhouse gases. Emissions of NH3, N2O, and CH4 were reduced by 12%, 99%, and 88%, respectively, when the manure heap was covered with an airtight material. (c) 2006 Elsevier Ltd. All rights reserved.