Abstract：
Offensive odors from wastewater treatment plants (WWTP) are caused by volatile inorganic compounds such as hydrogen sulfide and ammonia and volatile organic compounds (VOCs), such as toluene. To treat these pollutants, biofiltration is an effective and economical technology used worldwide due to its low investment and environmental impact. In this work, a laboratory-scale prototype biofilter unit for the simultaneous biofiltration of hydrogen sulfide, ammonia, and toluene was evaluated by simulating the emission concentrations of the El Salitre WWTP Bogotá, Colombia, using a compost of chicken manure and sugarcane bagasse as packing material for the biofilter. The prototype biofilter unit was set to an operation flow rate of 0.089 m3/h, an empty bed residence time (EBRT) of 60 s, and a volume of 0.007 m3 (6.6 L). The maximum removal efficiency were 96.9 ± 1.2% for H2S, at a loading rate of 4.7 g/m3 h and a concentration of 79.1 mg/m3, 68 ± 2% for NH3, at a loading rate of 1.2 g/m3 h and a concentration of 2.0 mg/m3, and 71.5 ± 4.0% for toluene, at a loading rate of 1.32 g/m3 h and a concentration of 2.3 mg/m3. The removal efficiency of the three compounds decreased when the toluene concentration was increased above 40 mg/m3. However, a recovery of the system was observed after reducing the toluene concentration and after 7 days of inactivity, indicating an inhibitory effect of toluene. These results demonstrate the potential use of the prototype biofilter unit for odor treatment in a WWTP.
摘要：
污水处理厂（WWTP）的恶臭是由硫化氢和氨等挥发性无机化合物以及挥发性有机化合物（VOC）引起的。如甲苯。为了处理这些污染物，生物过滤是一种有效和经济的技术，由于其低投资和环境影响，在世界范围内使用。在这项工作中,用于同时生物过滤硫化氢的实验室规模原型生物过滤器装置，氨,通过模拟ElSalitreWWTP波哥大的排放浓度来评估甲苯，哥伦比亚,使用鸡粪和甘蔗渣的堆肥作为生物过滤器的包装材料。原型生物过滤器单元设置为0.089m3/h的操作流量，空床停留时间(EBRT)为60s，体积为0.007m3(6.6L)。对H2S的最大去除效率为96.9±1.2%,加载速率为4.7g/m3h，浓度为79.1mg/m3，NH3为68±2%，加载速率为1.2g/m3h，浓度为2.0mg/m3，甲苯为71.5±4.0%，负载速率为1.32g/m3h，浓度为2.3mg/m3。当甲苯浓度增加到40mg/m3以上时，三种化合物的去除效率降低。然而,在降低甲苯浓度和不活动7天后观察到系统的恢复，表明甲苯的抑制作用。这些结果证明了原型生物过滤器单元在WWTP中用于气味处理的潜在用途。
