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食控制 H₂S 在高固体无氧消化中在现场生产

Cen Ruxiang¹, Chen Ruiying¹, Pu Tianyun¹

¹Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), College of Agriculture, Institute of New Rural Development, Engineering Laboratory for Pollution Control and Resource Reuse Technology of Livestock and Poultry Breeding in Plateau Mountain (Guizhou Province), Guizhou University, Guiyang, 550025, China.

Bioresources and bioprocessing

|April 22, 2024

概括

在高固体无氧消化过程中,带入空气的半连续养显著减少了硫化 (H2S) 的产生. 这种方法为 H2S 排放的现场控制提供了一个有希望的方法.

科学领域:

环境工程环境工程
生物技术是生物技术.
化学工程是化学工程的重要组成部分.

背景情况:

高固体无氧消化 (HSAD) 是废物处理和生物气生产的高效工艺.
硫化 (H2S) 是无氧消化过程中产生的有毒和腐蚀性气体,对运营和环境构成挑战.
有效控制H2S生产对于优化HSAD流程至关重要.

研究的目的:

调查半连续养与空气导入对HSAD中H2S产生的影响.
评估高频监测在描述H2S动态方面的有效性.
根据过程参数开发一个更准确的模型来预测H2S释放.

主要方法:

使用高频监控技术 (1点/3小时) 来跟踪H2S生产.
实现了半连续养与受控的空气导入.
测量了H2S度,挥发性脂肪酸 (VFA) 和氧化降解潜力 (ORP).
建立了一个基于VFA的H2S释放模型.

主要成果:

高频监测显示,与低频相比,H2S具有明显的特征.
在3小时内,H2S度从3449 ± 227 mg/m3显著下降到298 ± 45 mg/m3.
H2S度显示与VFA和ORP的负相关性.
在养过程中引入氧气占H2S减少的72-82%,而VFA生产贡献了18-28%.

结论:

含有空气的半连续养是一种非常有效的策略,用于在HSAD中对H2S进行现场控制.
高频监测可以更准确地了解快速的H2S波动.
开发的基于VFA的模型增强了H2S释放的预测,有助于过程优化.

关键词:

无氧消化消化无氧消化在H2S中释放H2S.高强度的固体高强度的固体短时间的时间尺度.挥发性脂肪酸是挥发性的脂肪酸.

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