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当前位置: 首页 > 文章 > 鸭粪厌氧消化过程的质能平衡研究 农业环境科学学报 2013,32 (09) 1886-1892
Position: Home > Articles > The Mass and Energy Balance Research on the Anaerobic Digestion of Duck Droppings Journal of Agro-Environment Science 2013,32 (09) 1886-1892

鸭粪厌氧消化过程的质能平衡研究

作  者：
王星;刘惠萍;周俊;罗伟中
单  位：
上海齐耀动力技术有限公司;上海市发展改革研究院
关键词：
鸭粪;厌氧消化;质能平衡
摘  要：
以鸭粪为原料,利用小型厌氧装置开展了厌氧消化工艺的实验研究。实验建立了3个进料浓度梯度,通过逐步提高进料料浆的浓度,研究了在不同进料负荷率情况下,厌氧消化系统的变化趋势,分析了进料负荷率与挥发性脂肪酸、总碱度、氨氮浓度的变化关系。通过建立质量平衡模型发现,当进料负荷率在4.17、8.33、12.5 kg TS·m-3·d-1时,单位TS产气率分别为0.34、0.26、0.19 m3·kg-1TS,对应的一级反应动力学常数k值分别为0.29、0.17、0.06 d-1,鸭粪理论TS产气率为0.44 m3·kg-1TS。经过对进料、出料热值的分析,当有机负荷率为8.33 kg TS·m-3·d-1,进入厌氧系统的鸭粪有45.36%转变为甲烷、47.05%转变为残余物、7.6%转化为热量散失(或被微生物自身利用)。研究认为当单位TS产气率达到理论TS产气率的60%~70%时,此时的停留时间、进料负荷是最为经济的,这一原则适合普通厌氧消化工程的设计及运行。
译  名：
The Mass and Energy Balance Research on the Anaerobic Digestion of Duck Droppings
作  者：
WANG Xing;LIU Hui-ping;ZHOU Jun;LUO Wei-zhong;Shanghai Micropowers Ltd.,;Shanghai Academy of Development and Reform;Shanghai Micropowers Ltd.;
关键词：
duck droppings;;anaerobic digestion;;mass and energy balance
摘  要：
To investigate the fermentation features of duck droppings at different loading rates,a lab scale fermentation process for the anaerobic treatment of duck droppings was carried out with an integrated bio-reacor.The experiment set up three step-wisely increased loading rates.The effects of volatile fatty acid,total alkalinity,ammonia nitrogen,retention time and loading rates on fermentation process were studied.With the mass balance equations,a theoretical yield of biogas(0.44 m3·kg-1TS)was achieved.At steady state,the yields of biogas were found to be 0.29 d-1,0.17 d-1,0.06 d-1,values for first order kinetics were obtained as 0.29 d-1、0.17 d-1、0.06 d-1when loading rates were set at 4.17 kg TS·m-3·d-1(TS=5%),8.33 kg TS·m-3·d-1(TS=10%),12.5 kg TS·m-3·d-1(TS=15%),respectively.According to the energy value analysis,45.36% heat value from duck droppings were converted to methane,47.05% to residues and 7.6% were lost as waste heat when loading rate was set at 8.33 kg TS·m-3·d-1.The research shows that the optimal loading rate and retention time can be obtained when biogas yield is equivalent to 60%~70% of the theoretical biogas yield.The present research achievements can apply for dimensioning completely stirred tank reactors digestion organic wastes from food processing industries,animal waste slurries or biogas crops.

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