Soluble microbial products in membrane bioreactors in the presence of ZnO nanoparticles

Mei, Xi; Wang, Zhiwei; Zheng, Xunhua; Huang, Fei; Ma, Jinxing; Tang, Jixu; Wu, Zhichao

doi:10.1016/j.memsci.2013.10.008

Cited by 61 publications

(31 citation statements)

References 44 publications

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“…This is possible because of the presence of both functional group charge which readily initiate deposition and adsorption on to unlike charged surface. Thus, this indicates that irrespective of the type of membrane used, b-EPS can easily get adsorbed on the surface to form a gel-like substance [259].…”

Section: Organic Foulants Generated During Pome Treatmentmentioning

confidence: 97%

“…Then, the fouling developed under this condition is fundamentally referred to as inorganic [161]. In a general view, other factors such as the shear rate (scouring aeration), system configurations, feed physicochemical properties and membrane characteristics (such as surface roughness) could as well immediate the mechanism [259,279].…”

Section: Inorganic Foulants Generated During Pome Treatmentmentioning

confidence: 99%

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Treatment of Palm Oil Mill Effluent Using Membrane Bioreactor: Novel Processes and Their Major Drawbacks

Abdulsalam

Man

Idris

et al. 2018

Water

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Over the years, different types of alternative technologies have been developed and used for palm oil mill effluent (POME) treatment. Specifically, membrane bioreactor (MBR) has been employed to relegate pollutants contained in POME under different operating conditions, and the technology was found to be promising. The major challenge impeding the wider application of this technology is membrane fouling, which usually attracts high operating energy and running cost. In this regard, novel methods of mitigating membrane fouling through the treatment processes have been developed. Therefore, this review article specifically focuses on the recent treatment processes of POME using MBR, with particular emphasis on innovative processes conditions such as aerobic, anaerobic, and hybrid processing as well as their performance in relation to fouling minimization. Furthermore, the effects of sonication and thermophilic and mesophilic conditions on membrane blockage were critically reviewed. The types of foulants and fouling mechanism as influenced by different operating conditions were also analyzed censoriously.

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Section: Organic Foulants Generated During Pome Treatmentmentioning

confidence: 97%

Section: Inorganic Foulants Generated During Pome Treatmentmentioning

confidence: 99%

Treatment of Palm Oil Mill Effluent Using Membrane Bioreactor: Novel Processes and Their Major Drawbacks

Abdulsalam

Man

Idris

et al. 2018

Water

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“…In contrast, the B-stage supernatant did not contain any compounds with RI greater than 3000 indicating that high MW compounds from the A-stage were hydrolyzed. This is relevant since membrane modules (ultrafiltration) are submerged in the B-stage membrane tank and the type of organics, their concentration and molecular weight will affect the fouling because they are the same size as the pore diameter (Mei et al, 2014). From this study, there were clear differences between the A-stage and B stage in terms of number of compounds, the type of organics, their concentration and molecular weight.…”

Section: Gc-ms Analysis Of Recalcitrant Compounds and Smps In Ab Processmentioning

confidence: 75%

“…The SMPs presented a broad molecular weight distribution from smaller than 1 kDa to over 100 kDa. In addition, these compounds constitute the main foulants in membrane bioreactors which are being used more widely around the world (Mei et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Identification of recalcitrant compounds in a pilot-scale AB system: An adsorption (A) stage followed by a biological (B) stage to treat municipal wastewater

Trzcinski

Ganda

et al. 2016

Bioresource Technology

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This manuscript presents a comparison of the A-stage and B-stage sludges in terms of anaerobic biodegradability and low molecular weight compounds present in the supernatant using Gas Chromatography-Mass Spectrometry (GC-MS). The GC-MS analysis of A-stage and B-stage supernatants identified respectively 43 and 19 organic compounds consisting mainly of aromatics (27.9% and 21%), alcohols (25.6% and 15%) and acids (30.2% and 15%). The methane potential was found to be 349±1 mL CH4/g VS and 238±12 mL CH4/g VS, respectively. After anaerobic digestion of these sludges, a greater proportion of aromatics (42% and 58%) and a lower proportion of acids (10% and 10%) and alcohols (16% and 10%) was observed.

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“…10 A recent study conrmed that ZnO NPs were present in sewage sludge and effluents. [12][13][14] Concerns can therefore be raised about whether the NPs in WWTPs have negative impacts on the microbial community in activated sludge, which may eventually hamper the function of WWTPs in removing pollutants from wastewater, such as chemical oxygen demand (COD), nitrogen and phosphorous. 11 The investigations in China in 2011 (139 WWTPs in total) and in 2009 (107 WWTPs in total) showed that the average concentration of Zn in biosolids was 1.03 g kg À1 -SS and that the maximum concentration was 9.14 g kg À1 -SS.…”

Section: Introductionmentioning

confidence: 99%

The impact of zinc oxide nanoparticles on nitrification and the bacterial community in activated sludge in an SBR

Wang

et al. 2015

RSC Adv.

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Zinc oxide (ZnO) nanoparticles (NPs) have been reported to induce adverse effects on organisms. The impacts of ZnO NPs on nitrification and the nitrobacteria community in activated sludge were investigated in a simulated SBR. It revealed that ZnO NPs at low concentrations (5 and 10 mg L À1 ) slightly inhibited nitrification. At these concentrations the activity of ammonia monooxygenase (AMO) and nitrite oxidoreductase (NOR) as well as the cell membrane integrity of Nitrosomonas europaea were almost unaffected. Concentrations of 20 mg L À1 and 50 mg L À1 ZnO NPs had significantly adverse effects on the activity of AMO and NOR and on the transformation of NH 4 + -N to NO 2 À -N and NO 2 À -N to NO 3 À -N. Analysis by denaturing gradient gel electrophoresis (DGGE) revealed that higher concentrations of ZnONPs significantly inhibited the growth of the typical ammonia-oxidizing bacteria (AOB) that were mainly responsible for oxidation of ammonia to nitrate. Moderate concentrations of ZnO NPs could accelerate the growth of some types of denitrifying bacteria and promote the growth of some pathogenic bacteria.Moderate and high concentrations of ZnO NPs could obviously destroy the integrity of the cell membrane of Nitrosomonas europaea. These findings meaningfully assessed the adverse effects of ZnO NPs on activated sludge in wastewater treatment.

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Soluble microbial products in membrane bioreactors in the presence of ZnO nanoparticles

Cited by 61 publications

References 44 publications

Treatment of Palm Oil Mill Effluent Using Membrane Bioreactor: Novel Processes and Their Major Drawbacks

Treatment of Palm Oil Mill Effluent Using Membrane Bioreactor: Novel Processes and Their Major Drawbacks

Identification of recalcitrant compounds in a pilot-scale AB system: An adsorption (A) stage followed by a biological (B) stage to treat municipal wastewater

The impact of zinc oxide nanoparticles on nitrification and the bacterial community in activated sludge in an SBR

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