生物滤池对堆肥过程中尾沼气耗氧量及净化效果的研究

X. Zhen, Miao Luo, Z. Li, Yongheng Zhang, Weiwei Wang, Jian Kang
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摘要

以新鲜牛粪、猪粪和鸡粪为原料,掺加10%的玉米秸秆作为膨化剂,进行好氧静态堆肥。对不同畜禽粪便堆肥过程中温度、pH、电导率、密度等参数的变化趋势进行了深入研究。结果表明:(1)将牛粪、猪粪和鸡粪堆肥系统的尾气引入生物滤池后,O2浓度略有下降,但CO2浓度升高。这些尾沼气中的臭味明显下降,表明尾沼气的生物降解效果明显。(2) 3种肥料在堆肥过程中不同时期的耗氧量基本相同,3种肥料的平均耗氧量分别为0.928、0.937和0.945 m3/kg。在标准条件下,氧密度为1.429 g/L,三种肥料堆肥过程的平均耗氧量分别为1.326、1.338和1.350 kg/kg。
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Study on the Rate of O2 Consumption and Purification of Tail Biogas with a Biofilter in the Composting Process
Abstract For aerobic static composting, fresh cow, pig, and chicken manures were used as feedstock and mixed with 10 % corn straws, which was considered as the bulking agent. In the composting process of different livestock and poultry manures, the changing trends of temperature, pH, conductivity, density, and other parameters were intensively studied. The results were as follows: (1) after the tail biogases of composting systems - using cattle manure, pig manure, and chicken manure - were introduced into the biofilter, the concentration of O2 decreased slightly, but the concentration of CO2 increased. The odour in these tail biogases declined significantly, and thus the biodegradation of tail biogas was obvious. (2) The oxygen consumption in the different periods of the composting process of these three manures was almost the same, and the average oxygen consumption for the three manures was 0.928, 0.937, and 0.945 m3/kg, respectively. Under standard conditions, the density of oxygen is 1.429 g/L, and the average oxygen consumption in the composting processes of these three manures was 1.326, 1.338, and 1.350 kg/kg, respectively.
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