Application of Polymeric Tubular Ultrafiltration Membranes for Separation of Car Wash Wastewater.

IF 3.3 4区 工程技术 Q2 CHEMISTRY, PHYSICAL Membranes Pub Date : 2024-09-28 DOI:10.3390/membranes14100210
Piotr Woźniak, Marek Gryta
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Abstract

The commercial ultrafiltration tubular polyvinylidene fluoride (PVDF) (100 and 200 kDa) and polyethersulfone (PES) (4 kDa) membranes were applied for filtration of car wash wastewater. Intensive fouling was noticed, which caused an over 50% flux reduction during 3-5 h of the filtration process. This phenomenon was reduced by washing the membranes with an alkaline cleaning agent (pH = 11.5), which is used in car washes to remove insects. The filtration/membrane washing cycle was repeated many times to achieve stable operation of the membrane modules. It has been found that cyclic repeated washing did not deteriorate the performance of the membranes. Despite frequent cleaning of the membranes (every 5-7 h), irreversible fouling occurred, resulting in a 20% reduction in the initial permeate flux. However, the formation of a filter cake definitely improved the separation degree and, for the 200 kDa membranes, separation of the wastewater components was obtained as it was for the 4 kDa membranes, while, at the same time, the permeate flux was 5 times higher.

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应用聚合物管式超滤膜分离洗车废水。
商用超滤管式聚偏二氟乙烯(PVDF)(100 和 200 kDa)和聚醚砜(PES)(4 kDa)膜被用于过滤洗车废水。在过滤过程中发现了严重的结垢现象,在 3-5 小时的过滤过程中,通量减少了 50%以上。用碱性清洗剂(pH=11.5)清洗膜后,这种现象有所缓解,碱性清洗剂在洗车时用于除虫。过滤/膜清洗循环重复多次,以实现膜组件的稳定运行。结果发现,循环反复清洗并没有降低膜的性能。尽管对膜进行了频繁的清洗(每 5-7 小时一次),但仍出现了不可逆的污垢,导致初始渗透通量降低了 20%。然而,滤饼的形成无疑提高了分离度,对于 200 kDa 膜来说,废水成分的分离效果与 4 kDa 膜相同,同时,渗透通量提高了 5 倍。
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来源期刊
Membranes
Membranes Chemical Engineering-Filtration and Separation
CiteScore
6.10
自引率
16.70%
发文量
1071
审稿时长
11 weeks
期刊介绍: Membranes (ISSN 2077-0375) is an international, peer-reviewed open access journal of separation science and technology. It publishes reviews, research articles, communications and technical notes. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. There is no restriction on the length of the papers. Full experimental and/or methodical details must be provided.
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