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两级滴滤去除硫化氢和甲硫醇混合恶臭气体 总被引:11,自引:0,他引:11
把氧化硫硫杆菌(T. thiooxidans)、排硫硫杆菌(T. thioparus)组成的自养菌群和黄单胞菌(Xanthomonas)为主的异养菌群分别接种在两个生物滴滤反应器中,将其依次串联净化处理硫化氢(H2S)、甲硫醇(MT)混合臭气.一级反应器(A#)的复合自养菌在酸性环境下对负荷为7~8g/(m3h)的H2S平均去除率可达94%,且不受混合气体中MT含量的影响.二级反应器(B#)适于中性环境,对负荷为4~5g/(m3h)的MT平均去除率为83%.若H2S在混合气体中浓度过高,经A#处理后的浓度仍高于50mg/m3,可导致后反应器酸化,使MT脱臭效率显著下降. 相似文献
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Volatile organic compounds containing reduced sulphur such as thiols and thioethers are released mostly from biological activities and a number of manufacturing processes, such as papermaking and petroleum refining. Environmentally benign and cost-effective air pollution control technology for reduced sulphur compounds is still a topic of research, e.g., in pulp and paper industry. Due to its advantages, photocatalytic oxidation over titanium dioxide presents a potential alternative for the air treatment strategies. The temperature influence on the reaction pathway and kinetics of gas-phase photocatalytic oxidation and thermal catalytic decomposition of ethanethiol over Degussa P25 TiO2 was established by a continuous flow method in a simple tubular reactor at temperatures from 373 to 453 K. Kinetic parameters for ethanethiol were: adsorption enthalpy −45 kJ mol−1 and activation energy 42 kJ mol−1. Sulphur dioxide, carbon monoxide, carbon dioxide, acetic acid and water were identified as by-products. 相似文献
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气相色谱法测定氨气中的甲硫醇及甲硫醚 总被引:2,自引:0,他引:2
建立了测定氨气中甲硫醇及甲硫醚的气相色谱分析方法。样品充入高纯氮气后,通过磷酸吸收液脱除氨气,有机硫化物由氨气转移到高纯氮气中,收集这部分气体,取1.0~2.0mL采用火焰光度检测填充柱气相色谱法进行分析。方法的相对标准偏差小于7%,甲硫醇和甲硫醚的加标回收率分别为92.1%和87.6%,最低检出量分别为0.11ng和0.17ng,最低检出质量浓度分别为0.11μg/L和0.17μg/L。 相似文献
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Strain JII screened out from different odor origins can efficiently degrade methyl mercaptan and ethanethiol whereas has no ability to remove dimethyl sulfide. The results indicated that the strain JII breaks only the C-SH bond. The optimum temperature and pH of JII are 20-30℃ and 6.0-8.3 respectively. A systematic identificatio nmethod-16S rDNA gene sequence comparison, for deodorizing bacteria was carried out. The 16S rDNA gene sequence analysis of strain JII showed the highest level of 97 % homology to Rape rhizosphere. 相似文献
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Investigation of factors on a fungal biofilter to treat waste gas with ethyl mercaptan 总被引:2,自引:0,他引:2
IntroductionOff gasescontainingVOCandodorsmaydogreatharmtoenvironmentandpeople’shealth .Therearemanymethodsfortreatingthem ,suchasphysicalmethods ,chemicalmethodsandbiologicalmethods.Biologicalmethodsarewidelyappliedintheprocessofoff gasespurificationfor… 相似文献
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甲硫醇泄漏风险控制技术 总被引:1,自引:0,他引:1
牛星钢 《中国安全生产科学技术》2010,6(3):187-190
通过对甲硫醇的危害性分析,利用其物质属性的规律,结合当前相关的先进风险控制理念和技术,采用减少储量、密闭与低温储存、探测传感和应急联动响应控制、设置喷淋、氧化、催化、无害化焚烧等应急处置科学控制技术,针对甲硫醇大量泄漏提出了系统性的风险控制技术措施,可有效降低或减弱甲硫醇泄漏事故的危害与影响。 相似文献
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有机硫化物是环境空气典型恶臭物质,因环境浓度低和化学稳定性差,其定性定量分析是公认的难题。研究筛选5台市场主流有机硫自动分析仪,在石化园区开展实测以考察仪器在复杂环境下的适用性。结果表明:各仪器能对环境空气中有机硫物质持续有效监测,多数仪器所测甲硫醇、甲硫醚、二甲二硫醚和二硫化碳浓度的时间变化趋势较一致,其中D和E仪器的4种有机硫监测数据均呈显著相关,其相关系数分别为0.67、0.80、0.67和0.70(P0.01)。不同仪器测得有机硫数据呈正偏态分布,但浓度分布区间差异较大,表明部分仪器对污染物的富集、脱附和检测等环节仍需改进。D和E仪器监测的有机硫浓度明显升高时,监测点位附近的GC-FID/PID测得总挥发性有机物浓度较其他时段升高,且周边区域异味投诉量增加,说明这2台仪器监测数据能较好地反映该园区有机硫化物的污染特征。研究可为石化园区有机硫自动监测仪的设备选型提供依据。 相似文献