Universidad Autónoma Metropolitana, Iztapalapa, México City, México.
Water Sci Technol. 2012;66(8):1641-6. doi: 10.2166/wst.2012.365.
The aim of this paper was to evaluate the performance of biotrickling filters (BTFs) for treating low concentrations of dimethyl disulfide (DMDS), using different bacterial consortia adapted to consume reduced sulfur compounds under alkaline (pH ≈ 10) or neutral (pH ≈ 7) conditions. Solubility experiments indicated that the partition of DMDS in neutral and alkaline mineral media was similar to the value with distilled water. Respirometric assays showed that oxygen consumption was around ten times faster in the neutrophilic as compared with the alkaliphilic consortium. Batch experiments demonstrated that sulfate was the main product of the DMDS degradation. Two laboratory-scale BTFs were implemented for the continuous treatment of DMDS in both neutral and alkaline conditions. Elimination capacities of up to 17 and 24 g(DMDS) m(-3) h(-1) were achieved for the alkaliphilic and neutrophilic reactors with 100% removal efficiency after an initial adaptation and biomass build-up.
本文旨在评估生物滴滤器（BTF）处理低浓度二甲基二硫（DMDS）的性能，使用不同的细菌群落，这些细菌群落适应在碱性（pH ≈ 10）或中性（pH ≈ 7）条件下消耗还原硫化合物。溶出实验表明，DMDS 在中性和碱性矿物介质中的分配与蒸馏水的值相似。呼吸测定表明，与嗜碱性群落相比，中性群落中的氧消耗速度快约十倍。批处理实验表明，硫酸盐是 DMDS 降解的主要产物。在中性和碱性条件下，连续处理 DMDS 时，实施了两个实验室规模的 BTF，嗜碱性和嗜中性反应器的去除容量分别高达 17 和 24 g(DMDS) m(-3) h(-1)，在初始适应和生物量积累后去除效率达到 100%。
