Jones Kim D, Martinez Al, Maroo Ketankumar, Deshpande Sonali, Boswell James
Department of Environmental Engineering, Texas A&M University, Kingsville, Texas 78363, USA.
J Air Waste Manag Assoc. 2004 Jan;54(1):24-35. doi: 10.1080/10473289.2004.10470877.
In this study, biofiltration using a natural wood chip medium and a commercial biofiltration medium was evaluated for the removal of moderate concentrations of hydrogen sulfide (H2S) (up to 100 parts per million by volume [ppmv]) in the presence of significant concentrations of ammonia (NH3). These levels were chosen as representative of wastewater lift station emissions in the Brownsville, TX, area. NH3-removing portions of the biofilms may compete with H2S-removing portions and inhibit H2S removal. H2S process removal efficiencies for the commercial and natural media ranged from 90 to 96% depending on inlet loading and media type and bed height. Kinetic analysis of the H2S removal process followed apparent first-order reaction behavior. The average first-order reaction rates were 0.03 sec(-1) for the commercial medium and 0.09 sec(-1) for the natural medium. Pressure drops across the columns ranged from 0.41 in. H2O/ft for the commercial medium to 1.41 in. H2O/ft for the natural medium. NH3 gas levels of up to 80 ppmv did not affect the H2S removal process efficiency, and calculated kinetic rate constants for H2S removal remained almost the same. The NH3 gas also was removed simultaneously with the H2S up to 98% removal efficiency by the commercial medium.
在本研究中，评估了使用天然木屑介质和商用生物过滤介质进行生物过滤，以去除在存在高浓度氨（NH₃）情况下中等浓度的硫化氢（H₂S）（体积分数高达百万分之一百[ppmv]）。选择这些水平作为德克萨斯州布朗斯维尔地区废水提升站排放的代表。生物膜中去除NH₃的部分可能会与去除H₂S的部分竞争，并抑制H₂S的去除。根据入口负荷、介质类型和床层高度，商用和天然介质对H₂S的处理去除效率在90%至96%之间。H₂S去除过程的动力学分析遵循表观一级反应行为。商用介质的平均一级反应速率为0.03秒⁻¹，天然介质为0.09秒⁻¹。柱内压降范围从商用介质的0.41英寸水柱/英尺到天然介质的1.41英寸水柱/英尺。高达80 ppmv的NH₃气体水平不会影响H₂S去除过程的效率，并且计算得出的H₂S去除动力学速率常数几乎保持不变。商用介质同时去除H₂S时，NH₃气体的去除效率也高达98%。
