畜禽粪污好氧发酵多参数监测系统设计与试验

doi:10.16174/j.issn.1673-4645.2024.03.004

摘要/Abstract

摘要： 为解决畜禽粪污好氧发酵监测系统的参数单一、缺少罐体强度与监测数据有效性分析等问题，研究设计了畜禽粪污好氧发酵多参数监测系统，并开展测试与试验。该系统基于多点分布的气体要温度传感器，采集粪污发酵过程中CO2、O2 及不同堆层温度的实时数据，利用DWIN DGUS 开发平台搭建本地操作系统，实现监测信息的显示、存储等，并采用ANSYS 软件对发酵罐体及搅拌机构的结构强度进行分析。结果表明，在机械结构强度仿真分析过程中，发酵罐体及搅拌机构最大等效应力分别为0.837 MPa、0.276 MPa，最大变形量分别为（1.61×10-3）mm、（4.44×10-4）mm，强度符合设计要求；在预试验过程中，发酵罐内在不同堆层的温度变化一致，其中罐内温度传感器A~E 采集温度的平均值分别为28.60℃、28.64℃、27.82℃、28.73℃和28.21℃，均显著高于罐外温度传感器F 的平均值25.51℃（P＜0.05），罐内CO2、O2浓度最大差值分别为221 ppm、0.5%；在正式试验过程中，粪污好氧发酵过程经历了完整的升温、高温、降温阶段，且粪污发酵高温期持续时间在5 d 以上，罐内CO2 浓度与O2 浓度呈相反的增减趋势变化；借助hampel 滤波识别方法分别构建了罐体中、下层的粪污发酵温度与发酵时间的回归模型，相关系数R2 分别为0.85 和0.79。说明该系统中各传感器采集的数据稳定，发酵过程符合好氧发酵的变化规律，发酵温度与发酵时间具有较好的相关性，可满足规模化好氧发酵过程参数在线监测需求。

关键词: 畜禽粪污, 发酵, 堆肥, 温度, 气体监测, 发酵罐, hampel 滤波, 仿真分析

中图分类号: S818.9；TP391.4；X713

赵文文, 仇天雷, 朱君, 王海峰, 贾楠, 李斌. 畜禽粪污好氧发酵多参数监测系统设计与试验[J]. 中国猪业, 2024, 19(3): 34-46.

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