Fe^(3+)对厌氧产甲烷体系的影响及生物有效性研究  

Effect of Fe^(3+) on Anaerobic Methanogenic System and Research of Fe^(3+) Bio-availability

作　　者：张瑜 石先阳[1] ZHANG Yu;SHI Xianyang(School of Resources and Environmental Engineering,Anhui University,Hefei 230601,China)

机构地区：[1]安徽大学资源与环境工程学院,安徽合肥230601

出　　处：《水处理技术》2018年第8期76-80,共5页Technology of Water Treatment

基　　金：国家自然科学基金项目(51278001);国家水体污染控制与治理科技重大专项(2012ZX07103-001-02)

摘　　要：通过间歇实验建立厌氧产甲烷体系,研究不同Fe^(3+)含量对厌氧颗粒污泥消化过程的影响。结果表明,当Fe^(3+)的质量浓度为0~40 mg/L时,甲烷产量随着Fe^(3+)含量增加而增加,加快了微生物对挥发性脂肪酸(VFAs)的利用;高含量Fe^(3+)(质量浓度50~100 mg/L)抑制厌氧产甲烷过程。当Fe^(3+)的质量浓度在40 mg/L时,获得最大甲烷气体体积1.578 L,较对照提高了36.32%。利用Gompertz模型拟合可得,最大产甲烷产率和甲烷潜在产量分别达到11.06m L/h和1.640 L,延滞时间缩短了3.98 h。脱氢酶和F420的质量浓度分别为27.23μg/L和54.85μg/L。且Fe^(3+)的质量浓度在40 mg/L时,污泥对Fe^(3+)水溶态和离子交换态利用率分别提高了90.36%和54.55%,总利用率达25.32%,生物有效性得到提升。Anaerobic methanogenic system was built by batch experiment,and the effect of different Fe^3＋content on anaerobic granular sludge digestion process was studied.The results showed that,when methane production increased with the increase of Fe^3＋mass concentration from 0-40 mg/L and accelerated the utilization of microorganisms for volatile fatty acids.However,the methanogenesis was inhibited when Fe^3＋content was high（mass concentration was 50-100 mg/L）.The maximum methane production volume was 1.578 L when of mass concentration Fe^3＋was 40 mg/L and increased by 36.32%compared with the control group.The maximum methane production rate and potential methane production increased to 11.06 m L/h and 1.640 L based on a modified-Gompertz model analysis,respectively,and the delay time shortened 3.98 h.The mass concentrations of dehydrogenases and coenzyme F420 reached 27.23μg/L and 54.85μg/L,respectively.When the Fe^3＋mass concentration was 40 mg/L,the utilization rate of water soluble fraction and exchangeable fraction of Fe^3＋increased by 90.36%and 54.55%resulting in a total Fe^3＋utilization reached 25.32%,suggesting that the Fe^3＋bio-availability was enhanced.

关 键 词：厌氧消化 金属微量元素 产甲烷活性 生物有效性 

分 类 号：X703.1[环境科学与工程—环境工程]