生物过滤塔净化甲醛废气的动力学研究  

作　　者：曹旭 

机构地区：[1]辽宁辐洁环保技术咨询有限公司,辽宁沈阳110161

出　　处：《环境保护与循环经济》2013年第11期28-32,共5页environmental protection and circular economy

摘　　要：选用榛子壳作为反应器的填料,利用沈阳北部污水处理厂的活性污泥对填料进行挂膜,由低到高通入甲醛气体进行驯化。在系统稳定后进行了生物过滤塔净化甲醛气体的实验研究,并建立了生物过滤塔降解甲醛气体的动力学模型。结果表明,入口气体浓度在低于25 mg/m3时,甲醛废气的净化效率可保持在97%以上,超过此浓度值时,效率明显下降。随着进口气体流量的增加,净化率逐渐下降,由入口流量为0.2 m3/h时的97.25%下降到入口流量为0.8 m3/h时的57.2%。根据现有动力学模型及本实验得出数据所建立的生物过滤塔净化甲醛气体的动力学模型,可以较好地模拟系统处理甲醛废气的实验结果,验证了模型的正确性。Hazelnut crust was employed as the carrier in the biofilter,the active sludge oi the normern wastewater treatment plant in Shenyang was filled into the filter, the biofilm was formed by culture on the surface of the carrier and acclimated by using formaldehyde from low concentration to high concentration into the biofilter. After the system is stable, beginning the research on purification of formaldehyde by using biofilter. The experimental results showed that the purification efficiency of formaldehyde was able to be maintained at more than 97% when inlet gas concentration was less than 25 mg/m3, When the inlet concentration was over 25 mg/m3, the removal rate was decreased significantly. As the inlet gas flux was continuously increased, the removal efficiency was gradually declined and the removal efficiency was declined from 97.25% in the inlet gas flux of 0.2 m3/h to 57.2% in the inlet gas flux of 0.8 mg/h. According to the kinetic model and the experimental data derived from the experiment can simulate the results of purification of formaldehyde, and verified the correctness of the model.

关 键 词：生物过滤塔 甲醛 净化效率 动力学模型 

分 类 号：X701.7[环境科学与工程—环境工程]