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2021-09-13
生物除臭技术
生物除臭技术是用自然界的有机生物分解过程处理工业废气,特别是有机废气(臭气)的净化处理,是运行费用低、有效的方法。
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生物除臭技术
Date﹕2021-09-13|Source:Eclear Environmental

生物除臭技术

一、生物除臭原理

生物除臭技术是用自然界的有机生物分解过程处理工业废气,特别是有机废气(臭气)的净化处理,是运行费用低、有效的方法。

其过程是利用固定附着在多孔介质填料表面的微生物,使气味在填料床上气。挥发性有机物等污染物吸附在孔表面,被孔中的微生物消耗,微生物的新陈代谢生命活动将废气中的有害物质转化为简单的无机物和细胞质,分解成CO2、H2O和中性盐。从而达到净化异味的目的。

臭气污染物+O2微生物细胞=CO2+H2O。

可处理的污染物有苯、甲苯、二甲苯、醇、醛、酮、酚、酯、四氢呋喃、硫醇等。此外,还可用于处理氨、H2S、NOX等无机气体。生物膜法适合治理浓度一般是≤1000mg/m3。

二、生物填料的选择。

火山岩比表面积大,亲水性强,表面有正电荷,开孔率高,惰性,有利于微生物的生长,维持微生物量多,有利于微生物代谢所需的氧气、营养物质和代谢产生的废弃物的物质传递过程。火山岩(Φ3~5mm),堆积高度500mm。

三、除臭系统说

曝气后,水中的气味进入填料层,火山岩上附着有气味作为营养物质的微生物。气味通过微生物的一系列生理生化反应迅速转化为无毒无害的CO2、H2O和中性盐。使用者可选择在生物填料层上方加入砂石层,在砂石层上种植花草,以美化环境。1m2火山岩臭气处理能力为3m3/m2min,风扇臭气输送能力为2.66m3/min,生物除臭系统设有3个处理口,每个处理口面积为600×600mm,总臭气处理能力为3.24m3/min。

四、特点

①生物除臭的异味处理效果非常好,可以在任何季节满足各地最严格的环境保护要求。

②净化效率高,一般≥90%;无二次污染。

③微生物可以依靠填料中的有机物生长,所以停机后启动速度快。周末停机或停机1-2周后启动,可以立即达到良好的处理效果,几小时后达到最佳处理效果。停止运行3-4周后启动,几天内恢复最佳处理效果。

④微生物在环境条件改变后部分死亡,部分经过短期繁殖后可发展为优势菌。因此,生物除臭系统具有抗冲击负荷,污染物浓度上升后,短时间内处理效果下降,但可迅速恢复正常。

⑤生物除臭系统的运行不需要额外的动力和专人操作,运行成本低。

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