生活垃圾堆肥恶臭气体的生物滴滤净化性能研究

Study on the Performance of A Biotrickling Filter in Purifying Odor Gases Released from Municipal Solid Waste Compost

    摘要
  • 摘要: 城市生活垃圾生物处理过程中会产生并散发大量的恶臭物质. 以纤维表面活性炭(ACOF)生物滴滤器(BTF)为载体，以进气风量及循环液流量为调控参数，对城市生活垃圾生化预处理过程中散发的恶臭气体进行现场试验. 结果表明：高气力负荷时，生物滴滤器对恶臭气体具有较好的净化效果.在空塔气速为1 274 m/h，液气比为1 L/m3左右时，总挥发性有机物(TVOCs)的去除率可保持在70%以上，而臭气浓度的去除率也大于70%，设备压降为2 150 Pa左右，总挥发性有机物(以异丁烯计)的消除能力可达130 g/(m3·h). BTF运行过程中压降保持相对稳定，循环液中ρ(CODCr)和ρ(NH3-N)未出现明显的累积现象，说明BTF对于污染物有良好的降解能力.

     

    Abstract: Large amount of odor gases is usually released during the process of municipal solid waste compost. Field experiments were conducted to treat odor gases with biotrickling filters (BTF) and the packing material is ACOF. The adjusting parameters of air flow and circulating liquid were studied. The results show that better purifying effect was achieved under high gas load. The TVOCs and odor unit (OU) removal efficiency could be kept above 70% when the gas velocity is 1 274 m/h and liquid-gas ratio is about 1 L/m3. The pressure drop of equipment is about 2 150 Pa. The maximum elimination capacity (EC) could reach 130 g/(m3·h). The pressure drop of BTF keeps relatively steady during the running period and the COD, NH3-N of circulating liquid are steady and do not appear to accumulate.

     

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