低碳氮比条件下猪粪堆肥氨气和温室气体排放
发布时间：2019-03-28 16:13
【摘要】：针对养殖场粪便产生量大、外加碳源物质成本高,堆肥需要添加大量的碳源物质,并且猪粪堆肥实际生产过程中氨气(NH_3)和温室气体(GHG)排放数据缺乏的问题,开展了低碳氮比(C/N)条件下的猪粪堆肥试验。试验采用箱式堆肥法,使用Innova 1312对氨气(NH_3)、氧化亚氮(N_2O)、甲烷(CH_4)和二氧化碳(CO_2)气体进行24h在线连续监测。结果表明:堆肥箱体内日平均温度超过50℃的持续天数均超过10d,满足国家相关标准的无害化要求;经过31d的好氧发酵,每千克初始原料鲜重的NH_3、N_2O、CH_4和CO_2的累计排放分别为2.27、0.07、0.24、135.72g,NH_3的排放主要集中在堆肥第1周和翻堆后10d,分别占总排放的31.09%和36.15%,GHG排放主要集中在第4周,占总排放的30.9%;在不考虑CO_2时,N_2O是GHG的主要贡献气体,贡献率为72.02%。堆肥过程中物料气体(NH_3、N_2O、CH_4和CO_2)累计排放量均与p H值呈现良好的正相关(P0.01)、与含水率和C/N呈现良好的负相关(P0.01)。建议对猪粪堆肥过程中NH_3的控制应集中在堆肥第1周和翻堆后,GHG减排应重点关注堆肥后期N_2O的排放。
[Abstract]:In view of the large amount of fecal production and the high cost of additional carbon source, it is necessary to add a large amount of carbon source to the compost, and the data of ammonia (NH_3) and greenhouse gas (GHG) emission are lacking in the actual production of pig manure compost. A pig manure composting experiment with low C / N ratio (C / N) was carried out. The on-line monitoring of ammonia (NH_3), nitrous oxide (N _ 2O), methane (CH_4) and carbon dioxide (CO_2) was carried out using Innova 1312 in a box-type composting process. The results showed that the average daily temperature of compost was over 50 鈩，
本文编号：2449028
[Abstract]:In view of the large amount of fecal production and the high cost of additional carbon source, it is necessary to add a large amount of carbon source to the compost, and the data of ammonia (NH_3) and greenhouse gas (GHG) emission are lacking in the actual production of pig manure compost. A pig manure composting experiment with low C / N ratio (C / N) was carried out. The on-line monitoring of ammonia (NH_3), nitrous oxide (N _ 2O), methane (CH_4) and carbon dioxide (CO_2) was carried out using Innova 1312 in a box-type composting process. The results showed that the average daily temperature of compost was over 50 鈩，
本文编号：2449028
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