Fractionation of proteins and carbohydrates of extracellular polymeric substances in a membrane bioreactor system

Malamis, Simos; Andreadakis, A.

doi:10.1016/j.biortech.2009.01.053

Cited by 105 publications

(48 citation statements)

References 24 publications

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“…This was consistent with other literature (Malamis and Andreadakis, 2009). In the 2nd stage, it was clear that the MBR-NF system has an excellent pollutant removal performance (Fig.…”

Section: Pollutant Removalsupporting

confidence: 94%

“…The NF concentrate had the highest UV intensity of all the peaks. Malamis and Andreadakis reported that the macromolecule substances showed limited biodegradation owing to their nonbiodegradable character (Malamis and Andreadakis, 2009), which explain the higher accumulation of proteins and polysaccharides in the MBR effluent at the 2nd stage. These results are consistent with the 3D-EEMs and FT-IR results discussed above.…”

Section: Ft-ir Of Organicsmentioning

confidence: 99%

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Performance and fate of organics in a pilot MBR–NF for treating antibiotic production wastewater with recycling NF concentrate

Jianxing

Wei

et al. 2015

Chemosphere

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h i g h l i g h t sMBR-NF with NF concentrate recycling was tested for antibiotic-wastewater treatment. The system was effective for antibiotic production wastewater treatment and reuse. The MBR-NF process resulted in excellent water quality and a high water yield of 92%. Organic pollutants in the wastewater were almost completely retained by the NF. a r t i c l e i n f o b s t r a c tA double membrane system comprising a membrane bioreactor (MBR) combined with a nanofiltration (NF) membrane was investigated on a pilot scale for the treatment of antibiotic production wastewater over a three-month period at a pharmaceutical company in Wuxi, China. By recycling the NF concentrate, the combined MBR-NF process was shown to be effective for the treatment of antibiotic production wastewater, resulting in excellent water quality and a high water yield of 92 ± 5.6%. The water quality of the pilot-scale MBR-NF process was excellent; e.g., the concentrations of TOC, NH 4 + -N, TP were stable at 5.52, 0.68, 0.34 mg L À1 , respectively, and the values of turbidity and conductivity of the NF permeate were 0.15 NTU and 2.5 mS cm À1 , respectively; these values meet China's water quality standard requirements for industrial use (GB21903-2008). Not only were the antibiotic removal rates of spiramycin (SPM) and new spiramycin (NSPM) over 95%, the acute toxicity was also drastically reduced by the MBR-NF pilot system. The main organics in the MBR effluent were proteins, polysaccharides, and humic-like substances; they were almost completely retained by the NF membrane and further biodegraded in the MBR because the NF concentrate was recycled. The microbial community of the MBR did not significantly change with the recycling of the NF concentrate.

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“…This was consistent with other literature (Malamis and Andreadakis, 2009). In the 2nd stage, it was clear that the MBR-NF system has an excellent pollutant removal performance (Fig.…”

Section: Pollutant Removalsupporting

confidence: 94%

Section: Ft-ir Of Organicsmentioning

confidence: 99%

Performance and fate of organics in a pilot MBR–NF for treating antibiotic production wastewater with recycling NF concentrate

Jianxing

Wei

et al. 2015

Chemosphere

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“…Thus, it is clearly shown that hydrophilic membrane materials are preferable for reducing membrane fouling. Major membrane foulants are believed to be EPS from bacterial cell lysis, microbial metabolites, and unmetabolized wastewater components [26], including proteins, polysaccharides, nucleic acids, and other polymers [26][27][28]. Of these major foulants, we believe that hydrophobic …”

Section: Fouling Behavior In Batch Filtration Testsmentioning

confidence: 99%

The Effect of Membrane Material and Surface Pore Size on the Fouling Properties of Submerged Membranes

Jeon

Rajabzadeh

Okamura

et al. 2016

Water

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Abstract:We aimed to investigate the relationship between membrane material and the development of membrane fouling in a membrane bioreactor (MBR) using membranes with different pore sizes and hydrophilicities. Batch filtration tests were performed using submerged single hollow fiber membrane ultrafiltration (UF) modules with different polymeric membrane materials including cellulose acetate (CA), polyethersulfone (PES), and polyvinylidene fluoride (PVDF) with activated sludge taken from a municipal wastewater treatment plant. The three UF hollow fiber membranes were prepared by a non-solvent-induced phase separation method and had similar water permeabilities and pore sizes. The results revealed that transmembrane pressure (TMP) increased more sharply for the hydrophobic PVDF membrane than for the hydrophilic CA membrane in batch filtration tests, even when membranes with similar permeabilities and pore sizes were used. PVDF hollow fiber membranes with smaller pores had greater fouling propensity than those with larger pores. In contrast, CA hollow fiber membranes showed good mitigation of membrane fouling regardless of pore size. The results obtained in this study suggest that the surface hydrophilicity and pore size of UF membranes clearly affect the fouling properties in MBR operation when using activated sludge.

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“…Although MBR technology has many advantages over the conventional activated sludge process, membrane fouling and the increased energy consumption are a major barrier to further use of this technology [5,6]. Membrane fouling is a severe problem and affects operating cost due to the frequent membrane cleaning and the increased aeration demands [7,8].…”

Section: Introductionmentioning

confidence: 99%

Influence of the Backwash Cleaning Water Temperature on the Membrane Performance in a Pilot SMBR Unit

Lintzos

Chatzikonstantinou

Tzamtzis

et al. 2018

Water

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Abstract:In this work, different backwash (BW) schemes were applied on identical hollow fiber (HF) membranes in a membrane bioreactor (MBR) treating municipal wastewater. The effect of BW duration (1 min, 3 min and 8 min) and water temperature (8 • C, 18 • C, 28 • C and 38 • C) on membrane fouling were investigated. Specifically, the transmembrane pressure (TMP) drop and the membrane permeability increase caused by the BW was investigated. Furthermore, the time required for the membrane to return to the state just before each BW experiment, was also examined. It was found that membranes presented better operating performance, as the BW temperature and the backwash duration were increased. Specifically, for 1 min backwash duration at the BW temperatures of 8 • C, 18 • C, 28 • C and 38 • C, TMP decreased by 7.1%, 8.7%, 11.2% and 14.2% respectively. For 8 min BW duration at 8 • C, 18 • C, 28 • C and 38 • C, TMP values decreased by 12%, 17.5%, 23.7% and 30.2% respectively. Increased BW water temperature and duration also improved the membrane permeability. Using higher BW water temperatures, more hours were required to return the membranes to the condition just before cleaning. The selected BW water temperatures did not adversely affect the permeate quality.

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Fractionation of proteins and carbohydrates of extracellular polymeric substances in a membrane bioreactor system

Cited by 105 publications

References 24 publications

Performance and fate of organics in a pilot MBR–NF for treating antibiotic production wastewater with recycling NF concentrate

Performance and fate of organics in a pilot MBR–NF for treating antibiotic production wastewater with recycling NF concentrate

The Effect of Membrane Material and Surface Pore Size on the Fouling Properties of Submerged Membranes

Influence of the Backwash Cleaning Water Temperature on the Membrane Performance in a Pilot SMBR Unit

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