不同有机负荷下混合蔬菜废物厌氧消化性能分析

发布时间：2018-06-03 01:16

本文选题：废弃物 + 厌氧消化　；参考：《农业工程学报》2016年18期

【摘要】：为优化蔬菜废物厌氧消化工艺,提高蔬菜废物厌氧消化处理效率,该文以混合蔬菜废物为原料,通过逐级提高厌氧反应的有机负荷,分析研究了蔬菜废物在不同有机负荷下的厌氧消化性能及相应的物质转化规律。试验在有机负荷率OLR 1.0、1.5、1.75、2.0、2.25、2.5、3.0、3.25、3.5 g/(L·d)条件下共运行170 d。研究结果表明:最优有机负荷率为2.75 g/(L·d),极限有机负荷率为3.5 g/(L·d);在2.75 g/(L·d)条件下有机负荷产气率达到最高,达到0.54 L/(g/(L·d)),甲烷体积分数稳定在51%~59%。有机负荷2.75和3.0 g/(L·d)条件下挥发性固体去除率最高达66.81%。有机负荷率在1.0~3.25 g/(L·d)时,挥发性有机酸质量浓度在409~481 mg/L,乙醇浓度在380~490 mg/L,属乙醇型发酵。该研究结果可为提高蔬菜废物厌氧消化处理效率提供理论依据,具有重要意义。
[Abstract]:In order to optimize the anaerobic digestion process of vegetable waste and improve the efficiency of anaerobic digestion of vegetable waste, the organic load of anaerobic reaction was increased step by using mixed vegetable waste as raw material. The anaerobic digestibility of vegetable waste under different organic loading and the corresponding transformation law were studied. The experiment was carried out for 170d under the condition of organic loading rate (OLR 1.0 ~ 1.5g / L ~ (-1) / L ~ (-1) / L ~ (-1) ~ (-1) ~ (-1) ~ (2.25) ~ (2.5) ~ 3.25 ~ (3.5) g / L ~ (-1). The results show that the optimum organic loading rate is 2.75 g / L ~ (-1) L ~ (-1), the limit organic loading rate is 3.5 g / L ~ (-1) d ~ (-1), the gas production rate is the highest at 2.75 g / L ~ (-1) L ~ (-1), and the volume fraction of methane is stable at 51g / L ~ (59). Under organic loading of 2.75 and 3.0 g / L ~ d, the highest removal rate of volatile solids was 66.81%. When the organic loading rate was 1.0 ~ 3.25 g / L ~ d, the mass concentration of volatile organic acid was 409g / L, and the concentration of ethanol was 380g / L ~ 490 mg / L, which belonged to ethanol-type fermentation. The results can provide theoretical basis for improving the efficiency of anaerobic digestion of vegetable waste.
【作者单位】：北京化工大学环境科学与工程系;北京国能中电节能环保技术有限责任公司;
【基金】：“十二五”科技支撑项目(2015BAD21B03,2014BAC24B01)
【分类号】：X799.3;S216.4

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