中温条件下驴粪厌氧消化产甲烷潜力及特性分析
Analysis of Potential and Characteristics of Methane Production by Anaerobic Digestion of Donkey Manure under Medium Temperature Conditions
柳金虎 1张箭 2张云杰 2张无敌 1尹芳 1赵兴玲 1杨斌1
作者信息
- 1. 云南师范大学,云南 昆明 650500
- 2. 中国电建集团昆明勘测设计研究院有限公司,云南 昆明 650032
- 折叠
摘要
实验采用批量式厌氧消化工艺,在中温(35±1)℃、接种物浓度30％的条件下,选取驴粪作为发酵底物,设计沼气发酵TS浓度分别为5％、6％、7％、8％,探究了驴粪厌氧消化的产气潜力和产气规律,并通过修正的Gompertz模型对累积产甲烷量进行了相关性拟合.结果表明,驴粪发酵时间为40 d,以TS浓度8％的实验组产气量、甲烷含量最好,平均甲烷含量为54％,TS产气率为241.11 mL·g-1,VS产气率为286.29 mL·g-1,TS产甲烷率为130.48 mL·g-1,VS产甲烷率为154.93 mL·g-1.各实验组拟合数据的R2值在0.9714～0.9958,与模型拟合良好.从结果可以得出,以驴粪单独作为沼气发酵原料,产气量多,甲烷含量稳定.因此,在用厌氧消化工艺处理畜禽粪便产生沼气时,驴粪是可供选择的原料之一.
Abstract
In this experiment,a batch anaerobic digestion process was used.Under the conditions of medium temperature(35±1)℃ and 30％inoculator concentration,donkey dung was selected as fermentation substrate,and the TS concentra-tion of biogas was designed to be 5％,6％,7％and 8％,respectively.The gas production potential and gas production rule of donkey dung anaerobic digestion were explored.A modified Gompertz model was used to fit the cumulative methane production.The results showed that the fermentation time of donkey manure was 40 days,and the experimental group with 8％TS concentration had the best gas and methane content,the average methane content was 54％,the TS gas production rate was 241.11 mL·g-1,the VS gas production rate was 286.29 mL·g-1,the TS methane production rate was 130.48 mL·g-1,and the VS methane production rate was 154.93 mL·g-1.The R2 values of the fitted data of each experimental group ranged from 0.9714 to 0.9958,which was well fitted to the model.It can be concluded that using donkey dung as raw material of biogas fermentation alone can produce more gas and stable methane content.Therefore,donkey manure is one of the available raw materials to produce biogas from livestock manure treated by anaerobic digestion process.
关键词
驴粪发酵/厌氧消化/产甲烷/动力学Key words
donkey manure fermentation/anaerobic digestion/methane production/dynamics引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据