A review on membrane fouling control in anaerobic membrane bioreactors by adding performance enhancers. (April 2021)

• Record Type: Journal Article
• Authors: Sohn, Weonjung; Guo, Wenshan; Ngo, Huu Hao; Deng, Lijuan; Cheng, Dongle; Zhang, Xinbo
• Is Part Of: Journal of water process engineering. Volume 40(2021)
• Publication Date: 2021-04
• Subjects: AnMBR anaerobic membrane bioreactor -- PAC powder activated carbon -- GAC granular activated carbon -- SRT solids retention time -- VFAs volatile fatty acids -- MBRs membrane bioreactors -- AC activated carbon -- DOM dissolved organic matters -- BAC biologically activated carbon -- EPS extracellular polymeric substance -- DMBR aerobic dynamic membrane bioreactor -- TMP transmembrane pressure -- COD chemical oxygen demand -- SMP soluble microbial products -- SMX sulfamethoxazole -- TC tetracycline -- ETS erythromycin-tetracycline-sulfamethoxazole -- ST erythromycin-tetracycline -- Tmp trimethoprim -- Cbz carbamazepine -- Dcf diclofenac -- Tcs triclosan -- DOC dissolved organic carbon -- EGSB expanded membrane-coupled granular sludge bed -- DIET direct interspecies electron transfer -- UASB upflow anaerobic sludge blanket -- LCWW low-grade coal wastewater -- ZVI zero-valent iron -- ORP oxidation-reduction potential -- MLSS mixed liquor suspended solids -- TP total phosphorous -- EGSB expanded granular sludge bed -- SCFA short chain fatty acids -- LCFA long chain fatty acids -- SS suspended solid -- AOX adsorbable organic halogen; Anaerobic membrane bioreactor -- Membrane fouling -- Enhancers -- Activated carbon; Water-supply engineering -- Periodicals; Saline water conversion -- Periodicals; Seawater -- Distillation -- Periodicals; Sanitary engineering -- Periodicals; Sewage -- Purification -- Periodicals; 627
• DOI: 10.1016/j.jwpe.2020.101867
• Languages: English
• ISSNs: 2214-7144

Abstract

Highlights: Addition of fouling reduction enhancers can mitigate membrane fouling in AnMBRs. Activated carbon, biochar, and zeolite can act as an adsorbent in AnMBRs. Calcium, iron and polyaluminum chloride can act as a flocculant and a coagulant. Waste yeast and beads could act as a co-substrate and biocarriers, respectively. Overdosing or large particle size of enhancers might aggravate fouling. Abstract: Anaerobic membrane bioreactors (AnMBRs), the combination of anaerobic digestion and membrane technology, have gained increasing popularity due to their remarkable advantages over aerobic membrane bioreactors, such as biogas production and potential energy use. However, membrane fouling remains a challenging issue that deteriorates the performance of membrane and shortens its lifespan. Pretreatment of feed wastewater by adding fouling reduction enhancers, such as adsorbents and flocculants, into anaerobic membrane bioreactor can effectively mitigate membrane fouling by altering the feed properties. Activated carbon, such as powdered activated carbon (PAC) and granular activated carbon (GAC), has been widely applied as an adsorbent to aerobic and anaerobic membrane bioreactors for membrane fouling control. Organic enhancers such as biochar and waste yeast, and inorganic enhancers like polyaluminum chloride and zeolite have also been applied to AnMBRs promoting flocculation and coagulation. Thus, this review discusses the impacts of different fouling reduction enhancers under anaerobic conditions as well as AnMBR system. In addition, the mechanisms of the enhancers mitigating the membrane fouling are also summarized for better understanding of the effects of the enhancers in AnMBRs.