Exploring the effect of aeration intensity on a modified PVDF-PEG membrane incorporated with nano-MgO: antifouling and AnT-POME treatment

IF 2.3 4区工程技术 Q3 CHEMISTRY, MULTIDISCIPLINARY

Separation Science and Technology Pub Date : 2023-07-16 DOI:10.1080/01496395.2023.2237181

H. Man, Mohammed Abdulsalam, Fikri Ahmad Abdullahi, Murni Marlina Abd-Karim, Khairul Faezah Yunos, M. Aida Isma

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Abstract

ABSTRACT Aeration effects on membrane filtration of wastewater remain partially explored, as lesser or excessive application often aggravates the fouling. Furthermore, most polymeric membranes are hydrophobic, which facilitates the deposition of foulants and layer formation. There is a need for further investigation on the use of aeration and membrane modifications with a better antifouling property. This study focused on investigating the influence of aeration intensity on the antifouling performance of a modified co-polymerized polyvinylidene-fluoride (PVDF-PEG) fiber using a hydrophilic nano-MgO to treat anaerobically digested palm oil mill effluent (AnT-POME). The aeration intensity was varied to three levels (3,4,5Lmin-1). Both neat and modified membranes obtained their best AnT-POME permeate flux at 4Lmin-1 with a relatively stable value of 28.67 and 89.85 Lm-2 h-1 after 5 h filtration, respectively. The irreversible fouling percentage (IFP) for the neat and modified membrane at 4Lmin-1 aeration intensity, was 66.67% and 12.42%, respectively. This indicates that the neat membrane is more susceptible to fouling. To investigate the changes in the membranes, the fouled membranes were characterized using SEM, FTIR and porosity, then compared with that of the pristine samples. Cake-scaly layers were noticed on the neat membrane. Additionally, both membranes successfully reduced the COD, TDS, TSS, and TN above 60%. GRAPHICAL ABSTRACT

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探讨曝气强度对纳米氧化镁改性PVDF-PEG膜的防污和抗聚甲醛处理的影响

曝气对废水膜过滤的影响尚不完全清楚，因为较少或过多的曝气往往会加重污染。此外，大多数聚合物膜是疏水的，这有利于污染物的沉积和层的形成。有必要进一步研究使用具有较好防污性能的曝气和膜改性。研究了曝气强度对改性聚偏氟乙烯-聚偏氟乙烯(PVDF-PEG)纤维处理棕榈油厂厌氧消化废水(AnT-POME)防污性能的影响。曝气强度分为3、4、5min -1 3个等级。净膜和改性膜在4lm -1时均获得最佳的AnT-POME渗透通量，过滤5 h后相对稳定的值分别为28.67和89.85 Lm-2 h-1。在4min -1曝气强度下，净膜和改性膜的不可逆污染率(IFP)分别为66.67%和12.42%。这说明整洁的膜更容易受到污染。为了研究膜的变化，利用扫描电镜(SEM)、红外光谱(FTIR)和孔隙率对污染膜进行了表征，并与原始样品进行了比较。整齐的膜上可见饼状鳞状层。此外，两种膜都能成功地将COD、TDS、TSS和TN降低60%以上。图形抽象

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来源期刊

Separation Science and Technology 工程技术-工程：化工

CiteScore

6.10

自引率

3.60%

发文量

131

审稿时长

5.7 months

期刊介绍： This international journal deals with fundamental and applied aspects of separation processes related to a number of fields. A wide range of topics are covered in the journal including adsorption, membranes, extraction, distillation, absorption, centrifugation, crystallization, precipitation, reactive separations, hybrid processes, continuous separations, carbon capture, flocculation and magnetic separations. The journal focuses on state of the art preparative separations and theoretical contributions to the field of separation science. Applications include environmental, energy, water, and biotechnology. The journal does not publish analytical separation papers unless they contain new fundamental contributions to the field of separation science.