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达禹环境-环保百科 当前位置: 达禹环境 > 环保百科 > 湿贮存对玉米秸秆黑膜沼气池厌氧消化性能的影响
湿贮存对玉米秸秆黑膜沼气池厌氧消化性能的影响
时间 : 2019-04-10 浏览量 : 34

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秸秆的生产具有季节性,所以秸秆贮存是保证沼气工程全年连续运营的关键环节。我国的秸秆沼  气工程由于原料收获方式、输送方式和资源分配等  原因2),造成原料特性复杂,且多以风干玉米秸秆  为主。因而在贮存方式上,也存在多种技术选择。


国外研究者 Shinners对比了玉米秸秆的干贮存与湿  贮存,发现将收获的水分含量44%玉米秸秆青贮8  个月其干物质损失为3.9%,而干秸秆(初始平均含  水量26%)的户外贮存的干物质损失可高达30%以  上3。最大程度的降低原料贮存过程的干物质损  失,可保证后续甲烷黑膜沼气池发酵阶段的原料产气率,提高沼  气工程的经济效益。而我国关于沼气工程生物质原  料的保护与贮存的研究正处于起步阶段。  湿贮存是依靠原料附生的微生物主要是乳酸菌  进行乳酸黑膜沼气池发酵产生小分子有机物迅速降低原料中  pH值来抑制微生物活性,防止干物质大量损失的  种贮存技术4。具有贮存过程中干物质损失低;水  分含量稳定,贮存后原料均一性好;发生火灾的危险


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黑膜沼气池厌氧消化试验采用5组玉米秸秆  个平行共计15个:1)华北地区的玉来究  存60天玉米秸秆:2)东北地区的玉米秸杆  60天玉米秸秆和湿贮存365天玉米杆。  照组为只接种污泥,用于计算污泥产气量和  气净产量。  该批次黑膜沼气池厌氧发酵试验于带有一次性铝盖的  mL玻璃黑膜沼气池发酵瓶中进行。污泥添加量与玉米  加量为2:1(基于挥发性固体质量浓度),将格杆  污泥加入黑膜沼气池发酵瓶中,充分混匀后,充入氮气,随后  即盖好硅胶塞,标号后置于37℃恒温水浴锅中  验期间使用玻璃注射器测量日均产气量,并分析  算累积产气量。产气潜能用修正的Cmm有  进行拟合,如下式所示:

p=Poexpi-exp[D.(A-1)+11

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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、可拆卸游泳池彩经网等,欢迎新老客户洽谈合作,共谋发展!