酸性洗涤塔-生物滤塔-生物曝气池组合工艺处理恶臭气体NH3和H2S

采用酸性洗涤塔、生物滤塔和生物曝气池的组合工艺处理NH3、H2S恶臭混合气体,研究表明,该组合工艺对NH3和H2S有很好的去除效果,在进气流量为35 L/min,喷淋量45 L/h时,NH3进气浓度50.15~525.4 mg/m3,H2S进气浓度10.23~110.36 mg/m3时,NH3单一进气去除率稳定在99%以上,H2S单一进气去除率90%以上。混合进气后,NH3去除率几乎为100%,H2S的去除率提高至98%以上。在一定的浓度范围内,NH3和H2S之间的相互作用对两者的去除效果没有明显的影响,而且起到了相互促进降解的作用。同时,进气流量和填料层高度都会影响NH3、H2S的去除率。系统对进气容积负荷变化的缓冲能力强,在偶尔超负荷条件下运行并不能使系统崩溃,并且微生物对高负荷逐渐表现出适应性。大部分溶于水的氨由生物曝气池去除,去除率达到96.9%。

Treatment of odors mixed with hydrogen sulfide and ammonia by combined biofilter

A novel combined biofitter, which is composed of acidic scrubber, biofilter and biological aeration basin,was used to treat the odors mixed by NH₃ and H₂S. The results indicated that the removal rate of NH₃ and H₂S were over 99% and 90%, respectively with the odors entering singly,when the flow rate of odor was 35 L/h, the fitting spraying quantity of nutriend fluids was 45 L/h, the mass concentration of NH₃ was 50.15~525.4 mg/m³ and H₂S was 10.23~110.36 mg/m³. The removal rate of NH₃ and H₂S increased to 100% and 99%, respectively when the odors intaked mixed. In a certain concentration range, the interaction between NH₃ and H₂S had little influence on their removal efficiency, but promoted the degradation mutually. The removal rate of NH₃ and H₂S also could be affected by the flow rate and the packing layer height. The combined biofilter had a wide buffering capacity and could recover quickly in a short time of shock loading. And the microorganism in the system would adapt to the high intake volume load gradually. The ammonia solubled in liquid could be removed 96.9% by the biological aeration basin.