Optimizing the logistics of anaerobic digestion of manure
Optimizing the logistics of anaerobic digestion of manure
复制标题
优化粪便厌氧消化的物流
DOI：
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发表时间：
2007
影响因子：
3
通讯作者：
P. Flynn
中科院分区：
文献类型：
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作者：
E. Ghafoori;P. Flynn
粪便厌氧消化（AD）产生的沼气燃烧发电是从动物粪便中回收能量的一种手段。我们评估了为多个受限进料操作提供服务的集中式AD工厂之间移动物料的最低成本方法。以加拿大阿尔伯塔省的莱斯布里奇县和阿尔伯塔省的红鹿县为例，前者是一个集中的肉牛饲养场，后者是一个混合养殖区，拥有生猪、奶牛、鸡和肉牛饲养场和饲养场。我们评估了两种类型的AD工厂：一种是将消化物返回到源限制饲养操作以用于土地扩张（目前的技术），另一种是处理消化物以产生固体肥料和可排放的水流（正在开发的技术）。我们评估了粪便和消化物的运输，通过管道运输粪便和消化物的返回，以及粪便和消化物的管道运输。我们比较了这些方案与基于农场或饲养场的AD设备的总体电力成本。对于集中式AD工厂，粪肥和粪肥最经济的运输方式是混合养殖区用卡车运输，集中式饲养场用管道运输。对于具有消化处理的集中式AD工厂来说，最经济的运输选择是用卡车运输粪便。然而，对于集中的饲养场地区，管道运输粪肥的成本接近卡车运输，卡车拥堵的影响很可能导致选择管道运输。对于混合养殖区，集中式AD比单个养殖场或饲养场更经济。对于集中式饲料场区域，集中式AD装置的经济性不如基于饲料场的AD装置，其经济性大于55,000头（消化液回收）和300,000头（消化液处理）。该研究表明，在大多数农业环境中，集中式AD工厂与基于农场的单位的可行性，并且需要根据具体情况对管道运输与卡车运输粪肥和消化液的成本进行仔细分析。
Electrical power production from the combustion of biogas from anaerobic digestion (AD) of manure is a means of recovering energy from animal waste. We evaluate the lowest cost method of moving material to and from centralized AD plants serving multiple confined feeding operations. Two areas are modeled, Lethbridge County, Alberta, Canada, an area of concentrated beef cattle feedlots, and Red Deer County, Alberta, a mixed-farming area with hog, dairy, chicken and beef cattle farms, and feedlots. We evaluate two types of AD plant: ones that return digestate to the source confined feeding operation for land spreading (current technology), and ones that process digestate to produce solid fertilizer and a dischargeable water stream (technology under development). We evaluate manure and digestate trucking, trucking of manure with return of digestate by pipelines, and pipelining of manure plus digestate. We compare the overall cost of power from these scenarios to farm or feedlot-based AD units. For a centralized AD plant with digestate return for land spreading the most economical transport option for manure plus digestate is by truck for the mixed-farming area and by pipelines for the concentrated feedlot area. For a centralized AD plant with digestate processing, the most economical transport option is trucking of manure for both cases.However, for the concentrated feedlot area, pipeline transport of manure is close in cost to trucking, and the impact of truck congestion would likely lead to selection of pipeline transport. For the mixed-farming area, centralized AD is more economical than for any individual farm or feedlot unit. For the concentrated feedlot area, a centralized AD plant is less economical than a feedlot-based AD unit more than 55,000 head (digestate return) and 300,000 head (digestate processing). The study demonstrates the viability of centralized AD plants vs farm-based units in most farming environments, and that careful analysis of the cost of pipeline vs truck transport of manure and digestate is required on a case-by-case basis.