Accelerated start‐up and microbial community structures of simultaneous nitrification and denitrification using novel suspended carriers

Liu, Tao; Jia, Guangyue; Quan, Xie

doi:10.1002/jctb.5404

Cited by 26 publications

(4 citation statements)

References 37 publications

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“…Meanwhile, the modified PVC has a positive charge, which will attract the bacteria and facilitate the adsorption of bacteria. The increase in the amount of bacteria on the biofilm carrier can effectively improve the ability and efficiency of sewage treatment [15,30,34].…”

Section: Electrophilicity Of Pvc Biofilm Carriermentioning

confidence: 99%

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Enhanced Hydrophilic and Electrophilic Properties of Polyvinyl Chloride (PVC) Biofilm Carrier

Cai

Wang

et al. 2020

Polymers

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Polyvinyl chloride (PVC) biofilm carrier is used as a carrier for bacterial adsorption in wastewater treatment. The hydrophilicity and electrophilicity of its surface play an important role in the adsorption of bacteria. The PVC biofilm carrier was prepared by extruder, and its surface properties were investigated. In order to improve the hydrophilicity and electrophilic properties of the PVC biofilm carrier, polyvinyl alcohol (PVA) and cationic polyacrylamide (cPAM) were incorporated into polyvinyl chloride (PVC) by blending. Besides, the surface area of the PVC biofilm carrier was increased by azodicarbonamide modified with 10% by weight of zinc oxide (mAC). The surface contact angle of PVC applied by PVA and cPAM at 5 wt %, 15 wt % was 81.6°, which was 18.0% lower than pure PVC. It shows the significant improvement of the hydrophilicity of PVC. The zeta potential of pure PVC was −9.59 mV, while the modified PVC was 14.6 mV, which proves that the surface charge of PVC changed from negative to positive. Positive charge is more conducive to the adsorption of bacteria. It is obvious from the scanning electron microscope (SEM) images that holes appeared on the surface of the PVC biofilm carrier after adding mAC, which indicates the increase of PVC surface area.

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Section: Electrophilicity Of Pvc Biofilm Carriermentioning

confidence: 99%

“…At the same time, its surface is relatively smooth, and its specific surface area is relatively small. Moreover, the surface of pure PVC is negatively charged, which is the same as the surface of bacteria [ 6 , 29 , 30 , 31 ]. These disadvantages make it difficult for bacteria and microorganisms to attach to PVC biofilm carriers.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Hydrophilic and Electrophilic Properties of Polyvinyl Chloride (PVC) Biofilm Carrier

Cai

Wang

et al. 2020

Polymers

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“…In a recent study, Zhang et In addition to enhanced biofilm formation, the removal efficiencies of target pollutants (i.e. COD, NH4-N, and total nitrogen) in the biofilm reactor with electrophilic modified carriers are assumed to be better than those with unmodified carriers (Mao et al, 2017;Liu et al, 2018b). For example, Liu et al (2018b) found that that a higher amount of attached biomass was observed on modified carriers (PQAS-10 and Fe2O3 modified PE) compared to unmodified carriers (pure PE).…”

Section: Inert Organic Materials-based Biofilm Carriersmentioning

confidence: 99%

“…COD, NH4-N, and total nitrogen) in the biofilm reactor with electrophilic modified carriers are assumed to be better than those with unmodified carriers (Mao et al, 2017;Liu et al, 2018b). For example, Liu et al (2018b) found that that a higher amount of attached biomass was observed on modified carriers (PQAS-10 and Fe2O3 modified PE) compared to unmodified carriers (pure PE). As a result, the removal efficiency of TN, COD, and NH4-N in biofilm reactor with modified carriers was superior to that with unmodified carriers.…”

Section: Inert Organic Materials-based Biofilm Carriersmentioning

confidence: 99%

Insights into biofilm carriers for biological wastewater treatment processes: Current state-of-the-art, challenges, and opportunities

Zhao

Liu

Huang

et al. 2019

Bioresource Technology

179

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Biofilm carriers play an important role in attached growth systems for wastewater treatment.This study summarizes the traditional and novel biofilm carriers utilized in biofilm-based wastewater treatment technology. The advantages and disadvantages of traditional biofilm carriers are evaluated and discussed in light of basic property, biocompatibility and applicability.The characteristics, applications performance, and mechanism of novel carriers (including slowrelease carriers, hydrophilic/electrophilic modified carriers, magnetic carriers and redox mediator carriers) in wastewater biological treatment were deeply discussed. Slow release 2 biofilm carriers are used to provide a solid substrate and electron donor for the growth of microorganisms and denitrification for anoxic and/or anaerobic bioreactors. Carriers with hydrophilic/electrophilic modified surface are applied for promoting biofilm formation. Magnetic materials-based carriers are employed to shorten the start-up time of bioreactor. Biofilm carriers acting as redox mediators are used to accelerate biotransformation of recalcitrant pollutants in industrial wastewater.

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Effects of Different Polymeric Materials on the Bacterial Attachment and Biofilm Formation in Anoxic Fixed-Bed Biofilm Reactors

Setiyawan

Nur

Fauzi

et al. 2023

Water Air Soil Pollut

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Six biofilm carriers with different polymer were studied in fixed-film systems under anoxic conditions. Different media of polymers influence wastewater treatment performance. The aim of this study was to investigate different polymeric materials, polyethylene terephthalate (PET), polyvinyl chloride (PVC), polypropylene (PP), high-density polyethylene (HDPE), and polymethyl methacrylate (acrylic), that affect bacterial attachment and biofilm formation in biofilm-based wastewater treatment technologies. Water contact angle (WCA) measurement was employed to analyze the role of wetting (hydrophilic/hydrophobic) of polymeric material surfaces in the initial phase of bacterial attachment. The increase of biofilm formation during the observation was determined by gravimetric (total attached solid) and microscopic (SEM and CLSM) analysis. The results showed the value for WCA of PET < HDPE < PVC < PP < acrylic, which indicated that a higher hydrophilicity surface leads to a higher total attached solid (TAS), biofilm formation rate, and biofilm thickness on the surface of media. The hydrophilic material (i.e., PET and HDPE) demonstrated wastewater treatment performance better than slightly hydrophilic material (i.e., PVC, PP, and acrylic) under a steady-state period (over an 80-day operation). The data showed a positive correlation between hydrophilic material and COD, NH4+-N, and TP removal. Hydrophilic material was beneficial for a fast start-up and stable biofilm formation of a fixed-bed biofilm reactor. PET media showed feasible polymer types compared to HDPE, PVC, and PP; thus, it can be used as an alternative biofilm carrier media in a larger-scale application. The findings of this study highlighted the polymeric material type has a significant effect on the performance of fixed-bed wastewater treatment.

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Accelerated start‐up and microbial community structures of simultaneous nitrification and denitrification using novel suspended carriers

Cited by 26 publications

References 37 publications

Enhanced Hydrophilic and Electrophilic Properties of Polyvinyl Chloride (PVC) Biofilm Carrier

Enhanced Hydrophilic and Electrophilic Properties of Polyvinyl Chloride (PVC) Biofilm Carrier

Insights into biofilm carriers for biological wastewater treatment processes: Current state-of-the-art, challenges, and opportunities

Effects of Different Polymeric Materials on the Bacterial Attachment and Biofilm Formation in Anoxic Fixed-Bed Biofilm Reactors

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