摘要
为了探究不同沼液回用方式下玉米秸秆厌氧消化的产气性能及运行稳定性,利用重力筛网过滤沼液和离心过滤沼液,分别对玉米秸秆进行预处理、用作上料配水、同时作预处理和上料配水,进行沼液回用与无沼液回用对比试验。结果表明:过滤沼液对玉米秸秆厌氧消化性能的提高比离心沼液更加显著,其中用过滤沼液同时作预处理和上料配水的试验组产气效果最佳,总产气量达18 645 m L,完成厌氧消化1个周期内总产气量90%的时间(T_(90))比其他沼液回用试验组提前2~5 d。过滤沼液试验组的物质转化率比离心沼液试验组高。试验组中,消化液的氨氮、碱度等均保持在正常范围,试验系统稳定性良好,沼液回用短时间内不会影响系统的正常运行。
In order to investigate the biogas production performance and operation stability of maize stover anaerobic digestion under different recycling modes of liquid fraction of digestate(LFD), anaerobic digestion of maize stover with and without LFD reuse was studied by using gravity screened filtered LFD and centrifugal LFD as pretreatment, or supplement water, or pretreatment and supplement water at the same time. The results showed that, the improvement efficiency of maize stover anaerobic digestion performance by filtered LFD was more significant than that by centrifugal LFD. The experimental group with filtered LFD as pretreatment and supplemen t water at the same time had the best biogas production performance, and the total biogas production reached18 645 mL, the time that accomplishing 90% of total gas production in 1 period of anaerobic digestion(T_(90)) was2-5 d earlier than that of the other experimental groups. The substance conversion rate of filtered LFD experimental group was higher than that of the centrifugal LFD experimental group. In the experimental group, the ammonia nitrogen and basicity of the digestive fluid remained in the normal range, which indicated that, the experimental system had good stability, and LFD reuse would not affect the normal operation of the system in a short time.
作者
闫香霖
汪炎
梅红
孔韡
YAN Xiang-lin;WANG Yan;MEI Hong;KONG Wei(East China Engineering Science and Technology Co.,Ltd.,Hefei 230024,China)
出处
《工业用水与废水》
CAS
2022年第1期26-31,共6页
Industrial Water & Wastewater
关键词
沼液回用
厌氧消化
玉米秸秆
沼气
预处理
生物质降解
recycling of LFD
anaerobic digestion
maize stover
biogas
pretreatment
biomass degradation
