水葫芦与猪粪堆肥化过程CO_2与NH_3释放特征研究

Characteristics of Carbon Dioxide and Ammonia Generation and Emission during Composting of Water Hyacinth and Swine Manure

为探讨水葫芦与猪粪在交替式好氧厌氧堆肥作用下CO2与NH3产生与释放特征,将水葫芦、猪粪与木屑以1.7:1.0:0.3(湿重比)的比例混合均匀,进行为期56 d交替式好氧厌氧堆肥化处理。结果表明,交替好氧厌氧条件下水葫芦与猪粪混合堆肥尾气中CO2浓度随堆肥进行先增加后缓慢减少,前14 d CO2释放量占该阶段总有机碳(TOC)减少量的92.75%。NH3的释放浓度随堆肥进行而逐渐降低,堆肥NH3释放浓度与温度变化具有明显相关性。NH3挥发是堆肥氮损失的主要根源,占堆肥过程前14 d总氮(TN)损失的73.79%。

Water hyacinth, swine manure and sawdust were mixed at the ratio of 1.7：1.0：0.3 （on wet weight basis） and 56 days altemative aerobic and anaerobic composting was conducted for the investigation of carbon dioxide and ammonia generation and emission characteristics. Results showed that carbon dioxide concentration in the exhaust of water hyacinth and swine manure composted in alternative aerobic and anaerobic condition increased initially and reduced gradually after thermopile phase. Carbon loss caused by carbon dioxide emission accounted for 92.75% of total organic carbon loss during the initial 14 days composting. Ammonia emission concentration decreased with the composting, which had significant correlation with temperature, accounted for 73.79% of nitrogen loss during the initial 14 days composting as a principal source of nitrogen loss of composting.