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首页> 美国卫生研究院文献>International Journal of Environmental Research and Public Health >Treatment of Cattle Manure by Anaerobic Co-Digestion with Food Waste and Pig Manure: Methane Yield and Synergistic Effect
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Treatment of Cattle Manure by Anaerobic Co-Digestion with Food Waste and Pig Manure: Methane Yield and Synergistic Effect

机译：餐厨垃圾与猪粪厌氧共消化处理牛粪的甲烷收率及协同效应

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The management of cattle manure (CM) has become increasingly challenging because its production continues to rise, while the regulations on manure management have become increasingly stringent. In Korea, most farms produce CM as a dry mixture with lignocellulosic bedding materials (mainly sawdust), making it impractical to treat CM by anaerobic digestion. To address this problem, this study examined whether anaerobic co-digestion with food waste (FW) and pig manure (PM) could be an effective approach for the treatment of CM. The batch anaerobic digestion tests at different CM: FW: PM mixing ratios showed that more methane was produced as the FW fraction increased, and as the CM fraction decreased. The response surface models describing how the substrate mixing ratio affects the methane yield and synergistic effect (methane yield basis) were successfully generated. The models proved that the methane yield and synergistic effect respond differently to changes in the substrate mixing ratio. The maximum 30-day methane yield was predicted at 100% FW, whereas the maximum 30-day synergy index was estimated for the mixture of 47% CM, 6% FW, and 47% PM (total solids basis). The synergy index model showed that CM, FW, and PM could be co-digested without a substantial loss of their methane potential at any mixing ratio (30-day synergy index, 0.89–1.22), and that a possible antagonistic effect could be avoided by keeping the FW proportion less than 50%. The results suggest that co-digestion with PM and FW could be flexibly applied for the treatment and valorization of CM in existing anaerobic digestion plants treating FW and PM.
机译：牛粪（CM）的管理由于其产量的持续增长而变得越来越具有挑战性，而有关粪便管理的法规也变得越来越严格。在韩国，大多数农场生产的CM是与木质纤维素垫料（主要是锯末）的干燥混合物，因此通过厌氧消化处理CM是不切实际的。为了解决这个问题，本研究检查了厌氧消化与食物垃圾（FW）和猪粪（PM）的共消化是否可能是治疗CM的有效方法。在不同的CM：FW：PM混合比例下进行分批厌氧消化测试表明，随着FW分数的增加和CM分数的减少，会产生更多的甲烷。成功生成了描述基质混合比如何影响甲烷产率和协同效应（基于甲烷产率）的响应面模型。该模型证明甲烷产量和协同效应对底物混合比的变化有不同的响应。预计最大30天的甲烷产率为100％FW，而对于30％CM，6％FW和47％PM（以总固体计）的混合物，估计最大30天协同指数。协同指数模型表明，在任何混合比例下（30天协同指数，0.89–1.22），CM，FW和PM都可以被共同消化而不会大量损失其甲烷潜能，并且可以避免可能的拮抗作用保持FW比例小于50％。结果表明，在现有的厌氧消化厂中，与PM和FW共同消化可灵活地用于CM的处理和增值。

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