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2020-09-11
有哪些污水厂常用的除臭技术及应用现状如何?
有人生活的地方就会产生大量的废水,而近年来,由于科技的发展,越来越多的人搬到城市里居住,所以,城市中产生了大量的污水,废水。这些污水都会汇集到污水厂,而这些污水聚集到一起就产生了大量的臭气,本着有问题就要解决,所以就有了除臭设备和除臭技术的产生。
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有哪些污水厂常用的除臭技术及应用现状如何?
Date﹕2020-09-11|Source:Eclear Environmental
       有人生活的地方就会产生大量的废水,而近年来,由于科技的发展,越来越多的人搬到城市里居住,所以,城市中产生了大量的污水,废水。这些污水都会汇集到污水厂,而这些污水聚集到一起就产生了大量的臭气,本着有问题就要解决,所以就有了除臭设备和除臭技术的产生。那么,污水厂除臭的技术有哪些?应用的现状又如何呢?

羿清环保生物滤池除臭设备


       1、生物滤池

       生物滤池主要包括增湿器和生物处理装置两部分。由引风机收集的臭气经增湿装置预处理(有的预处理还包括温度调节、去除颗粒物等)后进入生物处理装置,气体中的污染物从气相主体扩散到填料外层的水膜并被填料所吸附,然后降解为二氧化碳、水等,处理后的气体从生物滤池的顶部排出。

       生物滤池的填料层是具有吸附性的滤料(如土壤、堆肥、活性炭等)。堆肥生物滤池因其较好的通气性和适度的通水和持水性,以及丰富的微生物群落,能有效地去除烷烃类化合物如丙烷、异丁烷,对酯及乙醇等生物易降解物质的处理效果更佳。

       2、生物滤床

       生物滤床除臭原理是将气体收集并加湿后通过管道输入生物滤床底部并使其扩散于土壤内,臭气中多种污染成分溶于水后吸附于土壤颖粒表面。经过一段时间在土壤颗粒表面可逐渐培养出针对致臭物质的微生物,并可不断将致臭物质分解,完成脱臭。

       生物滤床法的工艺流程为:臭气收集→风管输送→抽风机→预洗池加湿→生物滤池→排气。滤床填料可采用海绵、干树皮、干草、木渣、贝壳、果壳及其混合物等。广州猎德污水处理厂采用洗涤-生物滤床联合除臭工艺对污泥浓缩池、脱水间臭气进行处理,NH3去除率大于90%,H2S去除率大于99%。

       3、活性炭吸附

       活性炭吸附的除臭机理主要是利用活性炭的吸附作用,使恶臭气体通过吸附剂填充层而被吸附去除。活性炭除臭工艺是一种效率比较高的除臭技术,对恶臭物质有较大的平衡吸附量,对多种恶臭气体都可达到较好的吸附效果,但运行费用高,需定期维护,常用于低浓度臭气和脱臭的后处理。

            4、化学除臭


       化学除臭法是用化学介质(NaOH、NaOCl)与H2S进行反应,从而达到除臭目的。化学除臭法耐冲击负荷强,可间歇工作,工作方式灵活。但化学除臭法主要是针对H2S而进行的,成本高且臭味中含有多种气体成分很难用单一的化学反应来消除臭味。总之,用化学吸收法来处理臭味不是很成熟,该方法有待进一步来完善。
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