Fe3O4NPs对模拟大豆蛋白废水厌氧产甲烷的影响及动力学分析  

Effects of Fe3O4 nanoparticles on methanogenesis of simulated soybean protein wastewater and kinetic analysis

作　　者：蔡晓阳 唐仁士 张艳萍[1] CAI Xiaoyang;TANG Renshi;ZHANG Yanping(School of Light Industry of Science and Technology,Beijing Technology and Business University,Beijing 100048,China)

机构地区：[1]北京工商大学轻工科学技术学院

出　　处：《食品与发酵工业》2019年第22期47-53,共7页Food and Fermentation Industries

基　　金：中国轻工业清洁生产和资源综合利用重点实验室建设项目(19008001454)

摘　　要：为了提升大豆蛋白废水厌氧发酵产气性能,通过批式实验探究纳米Fe3O4(Fe3O4nanoparticles,Fe3O4NPs)对模拟大豆蛋白废水厌氧发酵产甲烷的影响,并采用2种不同模型对发酵过程中累积甲烷产量进行动力学分析。结果表明,添加适量的Fe3O4NPs有助于提高大豆蛋白废水厌氧发酵产气量和有机物去除率,促进产甲烷过程。质量浓度为300 mg/L时,累积产气量达到652.12 m L,比对照组提高23.51%,平均甲烷含量为81.63%;可溶性化学需氧量(soluble chemical oxygen demand,SCOD)、生化需氧量(biochemical oxygen demand,BOD5)和蛋白质去除率均最高,分别为89.11%、91.91%和71.52%,甲烷产率达到331.40 m L/g SCOD;添加Fe3O4NPs可以降低厌氧发酵过程中氨氮和总氮浓度。Transference模型和改进的Gompertz模型均可较好地拟合大豆蛋白废水厌氧发酵产甲烷过程,前者拟合度更高(R2>0.96),且Fe3O4NPs质量浓度为300 mg/L时获得的最大甲烷产率为350.84 m L/g SCOD。In order to improve the biogas yield during anaerobic digestion of soybean protein wastewater,the effect of Fe3O4 nanoparticles(Fe3O4 NPs)on methanogenesis of simulated soybean protein wastewater was investigated by batch experiment,and two models were used to analyze the cumulative methane production.The results showed that addition of Fe3O4 NPs could promote the gas production,the removal rate of organic matters and the level of methanogenesis.When the mass concentration of Fe3O4 NPs was 300 mg/L,the cumulative gas production reached 652.12 m L,23.51%higher than the control.The average methane content was 81.63%,and the highest removal rates of SCOD、BOD5 and protein were 89.11%,91.91%and 71.52%,respectively.The methane production rate reached 331.40 m L/g(SCOD).Adding Fe3O4 NPs could reduce the concentration of ammonia nitrogen and total nitrogen during anaerobic digestion.Both the Transference model and the modified Gompertz model could well fit the methanogenesis process while the former fits better(R2>0.96).The maximum yield of methane was as high as 350.84 m L/g(SCOD)with 300 mg/L of Fe3O4 NPs.

关 键 词：纳米Fe3O4(Fe3O4NPs) 大豆蛋白废水 厌氧发酵 甲烷产量 动力学分析 

分 类 号：X70[环境科学与工程—环境工程]