摘要
研究了玉米秆和稻壳在固体浓度为6%时的高温(50℃)发酵性能,并分析了发酵过程中氨氮浓度、碱度及挥发性脂肪酸等参数的变化情况。结果表明,玉米秆和稻壳的挥发性物质产甲烷率接近,分别为(157.67±3.00)mL/g VS和(155.83±6.25)mL/g VS,挥发性物质去除率分别为(53.38±0.81)%和(42.67±0.3)%。但稻壳相比于玉米秆无需粉碎,降低了输入能耗。发酵过程中氨氮浓度及挥发性脂肪酸数值低于抑制浓度,且碱度对发酵系统酸浓度变化具有很好的缓冲能力,可见玉米秆和稻壳适宜作为沼气工程的原料,并可在6%的固体浓度及高温条件下稳定发酵。
The anaerobic digestion performance of corn stalk and rice husk was studied at solids concentration of 6% andhigh-temperature （50oC）, and process parameters such as the concentration of ammonia, alkalinity and volatile fatty acidswere analyzed. The results showed that specific methane yields of corn stalk and rice husk were （157.67 ± 3.00） mL/g VSand （155.83 ± 6.25） mL/g VS, the removal rate of volatile solid were （53.38 ± 0.81）% and （42.67 ± 0.3）%, respectively.However, compared to the corn stalk, rice husk needs less input energy. The concentrations of ammonia and volatile fattyacid below the inhibitory concentration, and the alkalinity has good buffering capacity for the change of acid concentration.So corn stalk and rice husk are suitable as raw material for biogas plant, which are stable at high temperature and solidsconcentration of 6%.
出处
《新能源进展》
2014年第4期264-269,共6页
Advances in New and Renewable Energy
基金
国家863计划(2012AA101803)
关键词
厌氧发酵
稻壳
玉米秆
高温
anaerobic fermentation
rice husk
corn stalk
thermophilic
