Solid-state anaerobic digestion of livestock manure and reuse of digested dried manure solids as bedding for dairy cows

Bio-Terre Systems Inc.(BTS)的目标是为畜牧业开发节能解决方案，并保护 通过减少温室气体(GHG)排放来改善我们的环境质量，并回收养分来生产 有机肥。很明显，良好的牲畜铺垫来源对农场来说变得更加困难。到期 由于对生物燃料日益增长的需求，这些来源已经开始消失；因此，现有的 消息来源有所增加。因此，除了可再生能源生产外，BTS正在研究一种替代方案 经济的床上用品来源，对环境没有不利影响。 牛粪和垫料是一种可再生的有机生物质，在奶牛场常年可用。发展中 高效且具有成本效益的嗜冷干式厌氧消化(PDAD)工艺可以解决 寒冷气候地区与农业有关的环境、能源和粪便管理问题，如 加拿大。在本项目中提出了在嗜冷温度(~20oC)下的固态AD，因为它导致了 除绿色能源生产外，还可出口干有机肥。 与此同时，农场里仍然有大量的粪便，如果经过处理，可能会起到铺垫的作用。 通过分离、消化/合成。一些奶牛场实施了分离或干燥的消化粪便 固体作为床上用品的替代来源。然而，重复使用可能携带病原体和其他物质的被褥 细菌数负荷对牛群健康和牛奶质量有重要意义。研究表明，液体AD 这些系统有可能减少进入环境的病原体。因此，这一拟议的项目旨在 验证消化干粪便固体作为奶牛垫料的可行性 无臭材料。因此，该项目的成果将造福于BTS和加拿大农业 行业也是如此。

Bio-Terre Systems Inc. (BTS) aims to develop energy efficient solutions for livestock sectors and preserve the quality of our environment by reducing greenhouse gas (GHG) emissions, and recover nutrients to produce organic fertilizer. It is evident that good livestock bedding sources have become harder for farms to secure. Due to the growing demand for biofuels, these sources have started to disappear; consequently, price of the existing sources has increased. Hence, in addition to the renewable energy production, BTS is investigating an alternate economical bedding source that has no adverse effects on the environment. Cow manure with bedding is renewable organic biomass, available around the year on dairy farms. Developing efficient and cost-effective psychrophilic dry anaerobic digestion (PDAD) processes could resolve the farm-related environmental, energy, and manure management problems in cold-climate regions such as Canada. Solid-state AD at psychrophilic temperature (~20oC) is proposed in this project as it results in exportable dry organic fertilizer in addition to the green energy production. At the same time, there is still plenty of manure on farms that might serve the purpose of bedding if processed by separation, digestion/compositing. Some dairies have implemented separated or dried digested manure solids as an alternate source of bedding. However, re-using bedding that may carry a pathogen and other bacterial count load is significant for the herd health and milk quality. Research has shown that liquid AD systems have the potential to reduce pathogens entering the environment. Thus, this proposed project aims to validate the feasibility of using digested dried manure solids as dairy cow bedding in terms of pathogen and odor free material. Accordingly, the outcomes of this project will benefit BTS and the Canadian agricultural sectors as well.