Abstract：
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 NaHCO3 in the nutrient solution. BF1 displayed better resilience, maintained a stable pH of 4.6 ± 0.6, and achieved higher maximum elimination capacities (ECmax, 41 mg DMS m-3 h-1 (RE 38.3%), 146 mg DMDS m-3 h-1 (RE 83.1%), 47 mg DMTS m-3 h-1 (RE 93.1%)) at an EBRT of 56 s compared to BF2 (9 mg DMS m-3 h-1 (RE 7.1%), 9 mg DMDS m-3 h-1 (RE 4.8%) and 11 mg DMTS m-3 h-1 (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%).
摘要：
高效去除挥发性硫化合物(VSCs),如二甲基硫醚(DMS)，二甲基二硫醚（DMDS）和二甲基三硫醚（DMTS），是至关重要的，因为它们在下水道系统中的恶臭和腐蚀潜力。生物过滤器（BFs）为去除VSC提供了希望，但面临与pH控制和全面变化条件相关的挑战。两个BFs,在嗜酸条件下手术78天，评估了它们在不同入口浓度和空床停留时间(EBRT)下的性能。BF1，包含4-6毫米大理石石灰石用于pH控制，性能优于BF2，后者在营养液中使用NaHCO3。BF1表现出更好的弹性，维持4.6±0.6的稳定pH值，并实现更高的最大消除能力(ECmax，41mgDMSm-3h-1（RE38.3%），146mgDMDSm-3h-1（RE83.1%），47mgDMTSm-3h-1（RE93.1％）），与BF2相比，EBRT为56s（9mgDMSm-3h-1（RE7.1％），9毫克DMDSm-3h-1（RE4.8%）和11毫克DMTSm-3h-1（RE26.6%））。BF2在进食中断后表现出pH分层和性能下降。VSC的生物降解性遵循DMTS>DMDS>DMS的顺序，并确定了几种微生物有助于BF1中的VSCs降解，包括芽孢杆菌（14％），分枝杆菌（11%），嗜酸杆菌（7%），和酸杆菌(3%)。
