生物过滤二甲硫醚、二甲基二硫醚和二甲基三硫醚的混合气体：操作条件和微生物分析的影响。
Biofiltration of gaseous mixtures of dimethyl sulfide, dimethyl disulfide and dimethyl trisulfide: Effect of operational conditions and microbial analysis.
机构信息
Department of Chemical Engineering and Food Technologies, Wine and Agrifood Research Institute (IVAGRO), Faculty of Sciences, University of Cadiz, Cádiz, Spain; Research Group Environmental Organic Chemistry and Technology (EnVOC), Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium.
Research Group Environmental Organic Chemistry and Technology (EnVOC), Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium.
出版信息
J Environ Manage. 2024 Jun;362:121320. doi: 10.1016/j.jenvman.2024.121320. Epub 2024 Jun 5.
The efficient removal of volatile sulfur compounds (VSCs), such as dimethyl sulfide (DMS), dimethyl disulfide (DMDS) and dimethyl trisulfide (DMTS), is crucial due to their foul odor and corrosive potential in sewer systems. Biofilters (BFs) offer promise for VSCs removal, but face challenges related to pH control and changing conditions at full scale. Two BFs, operated under acidophilic conditions for 78 days, were evaluated for their performance at varying inlet concentrations and empty bed residence times (EBRTs). BF1, incorporating 4-6 mm marble limestone for pH control, outperformed BF2, which used NaHCO in the nutrient solution. BF1 displayed better resilience, maintained a stable pH of 4.6 ± 0.6, and achieved higher maximum elimination capacities (EC, 41 mg DMS m h (RE 38.3%), 146 mg DMDS m h (RE 83.1%), 47 mg DMTS m h (RE 93.1%)) at an EBRT of 56 s compared to BF2 (9 mg DMS m h (RE 7.1%), 9 mg DMDS m h (RE 4.8%) and 11 mg DMTS m h (RE 26.6%)). BF2 exhibited pH stratification and decreased performance after feeding interruptions. The biodegradability of VSCs followed the order DMTS > DMDS > DMS, and several microorganisms were identified contributing to VSCs degradation in BF1, including Bacillus (14%), Mycobacterium (11%), Acidiphilium (7%), and Acidobacterium (3%).
由于挥发性含硫化合物（VSCs），如二甲基硫（DMS）、二甲基二硫（DMDS）和二甲基三硫（DMTS）具有恶臭和腐蚀性，因此必须有效地将其去除。生物过滤器（BF）在去除 VSCs 方面具有潜力，但在大规模运行时面临 pH 控制和条件变化的挑战。本研究评估了在不同入口浓度和空床停留时间（EBRT）下，两种在嗜酸条件下运行 78 天的 BF 的性能。采用 4-6mm 大理石石灰石控制 pH 的 BF1 的性能优于采用营养溶液中 NaHCO3 的 BF2。BF1 表现出更好的弹性，保持稳定的 pH 值为 4.6±0.6，在 EBRT 为 56s 时，达到了更高的最大去除容量（EC，41mg DMS m h（RE 38.3%），146mg DMDS m h（RE 83.1%），47mg DMTS m h（RE 93.1%）），而 BF2 则分别为 9mg DMS m h（RE 7.1%），9mg DMDS m h（RE 4.8%）和 11mg DMTS m h（RE 26.6%）。BF2 出现 pH 分层，在进料中断后性能下降。VSCs 的生物降解性遵循 DMTS>DMS>DMDS 的顺序，在 BF1 中鉴定出几种微生物参与 VSCs 的降解，包括芽孢杆菌（14%）、分枝杆菌（11%）、嗜酸菌（7%）和 Acidobacterium（3%）。
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