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达禹环境-环保百科 当前位置: 达禹环境 > 环保百科 > 微量元素制剂提高黑膜沼气池厌氧产甲烷活性的研究
微量元素制剂提高黑膜沼气池厌氧产甲烷活性的研究
时间 : 2019-04-06 浏览量 : 53

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料化利用方向”。甲烷发酵是农业废弃物资源化和  能源化利用的主要途径之一,具有处理废物和回收  清洁沼气能源双重特点2  甲烷发酵过程中微生物细胞的合成代谢不仅需  要大量元素C,N和P等,也需要多种微量元素Fe  Co,Ni,Cu,Zm和Se等。 Zandvoort()等指出,微量  元素不仅参与合成厌氧微生物细胞,并且参与合成厌氧发酵彩经网过程中多种酶系统,其中Fe,Co和N对产  甲烷菌尤为重要。Fe是产甲烷菌细胞合成和生理代谢的最主要元素之一,参与合成并激活产甲烷菌  中CO脱氢酶和超氧化物歧化酶的活性,提高甲烷发酵系统的运行稳定性。Co是转甲基酶和CO脱氢酶的重要组成元素,对产甲烷菌、巴氏甲烷八叠  球菌等的生物活性也具有重要作用6。N是脱氢酶、乙酰辅酶A等多种辅因子的重要组成成分,甲烷发酵的产气性能与N的含量密切相关。Pobe  heim8等的研究结果表明,青贮玉米甲烷发酵系统中N浓度由0.6mg·L-增至0.8mg·L-1,沼气  产量可以提高25%。同时,多种微量元素在甲烷发酵中具有协同促进作用。向城市有机生活垃圾厌氧发酵批次试验中加入Fe,Co,Ni复合微量元素后,沼  气产量、甲烷浓度和化学需氧量( chemical oxygen  demand,COD)去除率分别提高43.4%,5.1%和  10.2%9。


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近年来,我国大中型沼气工程在数量及质量上取得了瞩目的成绩,然而目前针对沼气工程中营  养元素水平与原料甲烷发酵转化效率的相关研究还  较少。本研究试图从添加微量元素制剂的角度入  手,尝试增强厌氧微生物产甲烷活性,进而提高沼气工程甲烷发酵效率。


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原料和厌氧污泥分别取自以鸡粪、牛粪  玉米秸秆为原料的沼气工程,4座沼气工程均  北京郊区。取样时,各沼气工程均常年连域运行  稳定产气。表1提供了各沼气工程发酵罐的基本  行参数。鸡粪、牛粪、猪粪和玉米秸杆均为气工  的进料样品,取回后置于4℃冷库中保存。厌氧  泥均为沼气工程的新鲜出料,取回后分别置于30  1℃(鸡粪、牛粪和猪粪)或55℃±1℃(玉米  秆)恒温水箱(H60)中保存。原料和厌氧污说  性质如表2所示  1.2甲烷发酵动力学分析  采用批次实验分析各原料(鸡粪,牛粪,猪  玉米秸秆)甲烷发酵产气动力学。试验设计如表  所示,试验流程见图1。试验分为2组,分别为原  +微量元素和微量元素(对照),原料和空白(对  照),每组设置两个平行。黑膜沼气池彩经网厌氧污泥、原料和微量元素加入到120mL玻璃发酵瓶后,充入氮气2min形  成黑膜沼气池厌氧环境。采用水浴(HH60)保持35℃±1℃(鸡粪、牛粪和猪粪)或55℃±1℃(玉米秸秆)恒温。试验进行了53天,前25天每天测定产气量和甲烷含量,25天后每隔3天测定1次产气量和甲烷含量。文中给出的产气数据均为去除对照后的结果

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山东达禹环境工程有限公司已在沼气工程领域深耕十年,有着丰富的行业经验,生产各种沼气设备,承接大中小各种规模的沼气工程,承建黑膜沼气池、红泥膜沼气池等各种软体沼气池及双膜气柜、集雨窑等,同时生产加工各类液袋水囊、桥梁预压水袋、森林消防水袋、可拆卸游泳池等,欢迎新老客户洽谈合作,共谋发展!