Manure management systems have a major impact on odor from swine operations. A study was conducted to compare deep-pit manure management systems to flushing barn manure management systems for odor reduction and organic matter degradation. Bioreactors were used to mimic manure management systems in which manure and lagoon effluent were loaded initially, and subsequent manure added daily at 5% of its storage capacity (1 L). Final manure to lagoon effluent ratios were 10:0 (deep-pit manure management system), 7:3 (Korean flushing systems), 5:5 (enhanced flushing systems, EFS), and 2:8 (EFS). At the end of the trial, 4 (2:8), 10 (5:5), or 14 (10:0, 7:3) days, both manure and gas concentrations of odorants were measured, including total solids (TS), total nitrogen (TN), and total carbon (TC) of manure. Odor was evaluated using the odor activity values (OAV) and regression analysis was used to determine the effects of dilution and TS on manure properties and OAV. Solids in the manure were positively correlated to TN, TC, straight chain fatty acids (SCFA), branch chain fatty acids (BCFA), total phenols, and total indoles and positively correlated to OAV for SCFA, BCFA, ammonia, total phenols, and total indoles. Reducing TS by 90% reduced BCFA, ammonia, phenols, and indoles by equal amounts in air. Carbon dioxide was the main C source evolved averaging over 90% and methane increased with dilution quadratically. Overall reducing solids in manure by dilution had the biggest impact on both reducing odor and increased organic C degradation. This article is protected by copyright. All rights reserved.

中文翻译：

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猪粪稀释与泻湖污水对气味减少和粪便消化的影响

粪便管理系统对养猪场产生的气味有重大影响。进行了一项研究，将深坑粪肥管理系统与冲洗式谷仓粪肥管理系统进行比较，以减少气味和有机物降解。生物反应器用于模拟粪便管理系统，其中最初装载粪便和泻湖流出物，随后每天添加 5% 的储存容量（1 L）的粪便。最终粪便与泻湖污水的比率为 10:0（深坑粪便管理系统）、7:3（韩国冲洗系统）、5:5（增强冲洗系统，EFS）和 2:8（EFS）。在试验结束时，4 (2:8)、10 (5:5) 或 14 (10:0, 7:3) 天，测量粪便和气体中气味剂的浓度，包括总固体 (TS) 、粪便的总氮 (TN) 和总碳 (TC)。使用气味活性值 (OAV) 评估气味，并使用回归分析确定稀释和 TS 对粪便特性和 OAV 的影响。粪便中的固体与 TN、TC、直链脂肪酸 (SCFA)、支链脂肪酸 (BCFA)、总酚和总吲哚呈正相关，与短链脂肪酸、BCFA、氨、总酚和总酚的 OAV 呈正相关。总吲哚。将 TS 减少 90% 可以减少空气中等量的 BCFA、氨、苯酚和吲哚。二氧化碳是主要的碳源，平均超过 90%，甲烷随稀释二次增加。通过稀释整体减少粪便中的固体对减少气味和增加有机碳降解的影响最大。本文受版权保护。版权所有。