在高固体厌氧消化中，进料原位控制HS的产生。
Feeding controls HS production in situ in high solid anaerobic digestion.
作者信息
Ruxiang Cen, Ruiying Chen, Tianyun Pu, Chunyan Huang, Tengbing He, Guangliang Tian
机构信息
Resource 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.
出版信息
Bioresour Bioprocess. 2022 Aug 4;9(1):79. doi: 10.1186/s40643-022-00567-7.
In this study, a high frequency monitoring method was used to assess how semi-continuous feeding affects HS production in high solid anaerobic digestion. The results showed that HS characteristics at a monitoring frequency of 1 point/3 h were different to that of 1 point/24 h, its concentration decreased from 3449 ± 227 mg/m at 0 h to 298 ± 45 mg/m at 3 h. HS concentration was negatively correlated with volatile fatty acids (VFAs), and oxidation reduction potential (ORP). 72-82% of HS reduction in the first 3 h resulted from the introduction of O during feeding, and 18-28% of that was closely related to the production of a large quantity of soluble acidic matter, such as VFAs. A more accurate HS release model was established according to the content of VFAs. Totally, this study implies that feed carrying air is a promising method for in situ control of HS production in anaerobic digestion.
在本研究中，采用高频监测方法来评估半连续进料如何影响高固体厌氧消化中硫化氢（HS）的产生。结果表明，监测频率为1次/3小时时的HS特性与1次/24小时时不同，其浓度在0小时时为3449±227mg/m³，在3小时时降至298±45mg/m³。HS浓度与挥发性脂肪酸（VFAs）和氧化还原电位（ORP）呈负相关。前3小时内72 - 82%的HS减少是由于进料过程中引入了氧气，18 - 28%与大量可溶性酸性物质（如VFAs）的产生密切相关。根据VFAs的含量建立了更精确的HS释放模型。总体而言，本研究表明携带空气的进料是厌氧消化中原位控制HS产生的一种有前景的方法。
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