Permeate flux recovery and removal foulant performances of hollow fiber polyvinylidene fluoride membrane bioreactor with peroxodisulfate activated iron (II) sulfate as a chemical cleaning agent

Q1 Social Sciences South African Journal of Chemical Engineering Pub Date : 2024-03-23 DOI:10.1016/j.sajce.2024.03.013

Rahadian Abdul Rachman , Nurul Widiastuti , Adi Setyo Purnomo , Arief Widjaja , Zuhriah Mumtazah , Rizki Fitria Darmayanti , Maktum Muharja

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Abstract

The main challenge with membrane bioreactors is fouling, which leads to decreased flux performance and a shortened membrane lifespan. This study aims to provide a solution for the flux recovery and removal of irreversible fouling on Polyvinylidene Fluoride (PVDF) membranes without damaging their structure using sulfate radicals. Sulfate radicals are formed via peroxodisulfate precursors that are activated by Fe²⁺. The membrane flux recovery and irreversible fouling ratio were 88.45-99.04% and 11.60-0.96%, respectively, at operating temperatures of 298-308 K. The PVDF membrane has been tested for microfiltration and washed up to 6 times per cycle. The mechanical properties, XRD, SEM-EDX, and ATR-FTIR characterization of the PVDF membrane after washing with PDS/Fe²⁺ did not show a negative effect on the PVDF structure. Additionally, the results of the kinetic and thermodynamic studies showed that washing with PDS/Fe²⁺ inhibited the formation of fouling particles on the membrane surface. Based on this study, sulfate radical oxidants with PDS precursors activated by Fe²⁺ can be applied as cleaning chemicals for PVDF membranes without damaging their structures.

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以过氧化二硫酸盐活化硫酸铁（II）为化学清洗剂的中空纤维聚偏氟乙烯膜生物反应器的渗透通量回收和除污性能

膜生物反应器面临的主要挑战是污垢，污垢会导致通量性能下降和膜寿命缩短。本研究旨在提供一种解决方案，利用硫酸盐自由基恢复聚偏二氟乙烯（PVDF）膜的通量并去除不可逆污垢，同时不破坏其结构。硫酸根自由基是由过二硫酸盐前体经 Fe2+ 活化形成的。在 298-308 K 的操作温度下，膜通量恢复率和不可逆污垢率分别为 88.45%-99.04% 和 11.60%-0.96%。经 PDS/Fe2+ 洗涤后，PVDF 膜的机械性能、XRD、SEM-EDX 和 ATR-FTIR 表征均未显示出对 PVDF 结构的负面影响。此外，动力学和热力学研究结果表明，用 PDS/Fe2+ 洗涤可抑制膜表面污垢颗粒的形成。基于这项研究，硫酸根自由基氧化剂与被 Fe2+ 激活的 PDS 前体可用作 PVDF 膜的清洗剂，而不会破坏其结构。

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来源期刊

South African Journal of Chemical Engineering Social Sciences-Education

CiteScore

8.40

自引率

0.00%

发文量

100

审稿时长

33 weeks

期刊介绍： The journal has a particular interest in publishing papers on the unique issues facing chemical engineering taking place in countries that are rich in resources but face specific technical and societal challenges, which require detailed knowledge of local conditions to address. Core topic areas are: Environmental process engineering • treatment and handling of waste and pollutants • the abatement of pollution, environmental process control • cleaner technologies • waste minimization • environmental chemical engineering • water treatment Reaction Engineering • modelling and simulation of reactors • transport phenomena within reacting systems • fluidization technology • reactor design Separation technologies • classic separations • novel separations Process and materials synthesis • novel synthesis of materials or processes, including but not limited to nanotechnology, ceramics, etc. Metallurgical process engineering and coal technology • novel developments related to the minerals beneficiation industry • coal technology Chemical engineering education • guides to good practice • novel approaches to learning • education beyond university.