Advanced treatment of municipal wastewater by nanofiltration: Operational optimization and membrane fouling analysis

Li, Kun; Jianxing, Wang; Liu, Jibao; Wei, Yuansong; Chen, Meixue

doi:10.1016/j.jes.2015.09.007

Cited by 29 publications

(12 citation statements)

References 23 publications

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“…Figure S2c exhibited the peaks appeared in fouling layer ( Figure S2b) but with low intensity in the regions around 1375 cm −1 (C−N stretch) bands corresponding to primary and secondary amines. The peaks in the ranges of 3500-3300, 1490-1440, and 850-750 cm −1 could be assigned to N−H stretching and C−N stretching of the amides [58]. All the peaks related to the cleaned membrane exhibited low absorbance intensities, Figure S2c, confirming reduction of foulants.…”

Section: Ftir Analysismentioning

confidence: 88%

Membrane Fouling Characteristics of a Side-Stream Tubular Anaerobic Membrane Bioreactor (AnMBR) Treating Domestic Wastewater

Vincent

Tong

et al. 2018

Processes

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A lab-scale of a side stream anaerobic membrane bioreactor (AnMBR) equipped with a tubular membrane operated at the mesophilic temperature of 37.0 ± 1.2 • C for treating domestic wastewater was tested to investigate its performance and fouling characteristics at two organic loading rates (OLR) of 0.25 kg COD m −3 d −1 , and 0.70 kg COD m −3 d −1 , respectively. The AnMBR was operated for 600 days at sludge retention time (SRT) of 100 days. This AnMBR exhibits excellent chemical oxygen demand (COD) removal of 91% at 0.25 kg COD m −3 d −1 , and 94% at 0.7 kg COD m −3 d −1 respectively, with effluent-soluble COD below 50 mg/L. Chemically-enhanced cleaning method using NaOH, NaOCl, and citric acid solution were introduced for fouling investigation at these two stages. The results showed that sequential chemical cleaning of alkaline and acid were most effective to recover the membrane flux. The alkaline cleaning was effective at removing organic foulants, while citric acid cleaning was effective at removing the scalants. The analyses of the excitation emission matrix, gel permeation chromatography, and extracellular polymeric substances indicated that major components of membrane foulants were proteins, carbohydrates, humic, and fulvic acids. At 0.25 kg COD m −3 d −1 , organic fouling was more prone to be trapped in the cake layers and responsible for membrane pore blockage, inorganic fouling exhibited marginal contribution to the membrane fouling behavior. However, at 0.70 kg COD m −3 d −1 , high concentrations of organic and inorganic foulants supported an essential role of organic and inorganic fouling on membrane fouling behavior.Processes 2018, 6, 50 2 of 17 is a challenge in many parts of the world for domestic wastewater treatment. The application of anaerobic conventional technologies, such as up-flow anaerobic sludge blanket (UASB), expanded granular sludge blanket (EGSB), and strengthened circulation anaerobic (SCA) for low-strength domestic wastewater, have shown poor quality of effluent as a result of biomass loss [5,6]. The anaerobic digestion normally operates at mesophilic temperatures due to low biomass growth rate and the reduction of substrate utilization at low operational temperatures [7,8]. Conventional anaerobic technology has been the driving tool to deal with wastewater produced in different parts of the world [9,10]. However, this conventional anaerobic technology has been limited to meet society's needs.The anaerobic membrane bioreactor (AnMBR) technology appeared to be the suitable emerging technology. AnMBR has gained in popularity for the treatment of both low-and high-strength wastewater [11] as membrane costs have dropped drastically [12]. This is largely because AnMBR has the ability to provide superior effluent quality for reuse [13], has a small footprint of operation [14], and nutrient recovery compared to conventional anaerobic treatment facility that relies on gravity sedimentation. The AnMBR process proved to be a reliable technology in tourist areas and public places for wastewat...

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Section: Ftir Analysismentioning

confidence: 88%

Membrane Fouling Characteristics of a Side-Stream Tubular Anaerobic Membrane Bioreactor (AnMBR) Treating Domestic Wastewater

Vincent

Tong

et al. 2018

Processes

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“…ATR-FTIR spektrumları kirleticilerin karakteristik fonksiyonel ATR-FTIR analizleri ile belirlenen protein ve diğer organik esaslı maddeler muhtemelen atıksu içesindeki mikrobiyal metabolizmalar tarafından salgılanmıştır [18]. Birçok çalışmada protein ve polisakkarit gibi organik maddelerin membran tıkanmasında önemli rol oynadıkları rapor edilmiştir [19], [20].…”

Section: Membranların Atr-ftir Spektrumlarıunclassified

Farklı Özelliklere Sahip Polimerik Membranlarla Evsel Atıksuların Arıtılması

Elcik

Çelik

Çakmakçı

et al. 2016

Nevşehir Bilim Ve Teknoloji Dergisi

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ÖzBu çalışmada, ticari ve laboratuvar ortamında üretilen farklı özelliklere sahip polimerik membranlarla evsel atıksuların arıtılabilirliği araştırılmıştır. Çalışma dikey akışlı düz plaka membran modülünde 4 adet ticari membran (UP005, UP020, US100 ve NF270) ve 5 adet farklı oranlarda hazırlanmış kitosan (Ct) ve Fe3O4 katkılı poliakrilonitril (PAN) membranlar kullanılarak gerçekleştirilmiştir.Evsel atıksu içerisindeki organik madde gideriminde en yüksek verim (%70, KOİ) %2 Fe3O4/PAN membranı ile elde edilmiştir.Membranların filtrasyon akılarına göre, kitosan ve Fe3O4 nanopartiküllerinin akı üzerinde önemli bir etkisinin olmadığını belirlenmiştir. Filtrasyon akısının azalması, büyük oranda atıksu içerisindeki organik ve inorganik askıda katı maddelerin membran yüzeyinde birikmesi sebebiyle meydana gelmiştir. Bu çalışmada ayrıca, taramalı elektron mikroskobu (SEM), zayıflatılmış toplam yansıma fourier dönüşümü kızılötesi (ATR-FTIR) spektroskopisi ve temas açısı cihazları kullanılarak kirlenmiş membranların karakterizasyonu gerçekleştirilmiştir. Karakterizasyon çalışmalarının sonuçlarına göre, kirlenmiş membranların yüzeyinde %57.54 karbon (C), %38.23 oksijen (O) ve eser miktarda, Na, Mg, Al, Si, P, S, Cl, K, Ca, Ti, Fe elementleri tespit edilmiştir. Çalışma sonuçlarına göre, evsel atıksuların arıtılmasında membran özelliklerini iyileştirici katkı maddeleri ile geliştirilmiş polimerik membranların kullanılmasıyla etkili bir arıtımın sağlanacağı sonucuna ulaşılmıştır.Anahtar Kelimeler: Membran, filtrasyon, polimer, evsel atıksu, arıtma Municipal Waswater Treatment with Polymeric Membranes Having Different Characteristics AbstractIn this study, municipal wastewater treatability has been investigated with commercial and laboratory scale fabricated polymeric membranes having different characteristics. Studies were performed using 4 commercial membranes (UP005, UP020, US100 and NF270) and 5 polyacrylonitrile (PAN) membranes prepared with different ratios of chitosan (Ct) and Fe3O4 in a vertical flow flat plate membrane module. The maximum yield for the removal of organic substances in municipal wastewater (70%, COD) was obtained by 2% Fe3O4 / PAN membrane. According to the membrane filtration flux, there is no significant effect of chitosan and Fe3O4 nanoparticles on flux. The reduction of filtration flux have occurred due to the accumulation of the considerable amount of organic and inorganic suspended solids on the membrane surface. Also, in this study, characterization of fouled membranes were performed using scanning electron microscope (SEM), attenuated total reflection-fourier infrared (ATR-FTIR) spectroscopy and contact angle device. According to the results of characterisation studies, 57.54% carbon (C), 38.23% oxygen (O) and trace amounts of Na, Mg, Al, Si, P, S, Cl, K, Ca, Ti, Fe elements were determined on the surface of fouled membranes. The results showed that polymeric membranes which modified with high property additives would be provided efficient municipal wastewater treatment.

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“…However, the hybrid NF-RO process was capable of producing permeate which meets the water quality standards for irrigation of food crops. Li et al (2016) studied the performance of nanofiltration for the treatment of municipal wastewater using various applied pressures and feed solution pH [3]. It was found that the optimum performance was obtained at an applied pressure of 12 bar, a flow rate of 8 LPM and pH = 4.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Nanofiltration with Reverse Osmosis in Reclaiming Tertiary Treated Municipal Wastewater for Irrigation Purposes

et al. 2021

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This study compares the performance of nanofiltration (NF) and reverse osmosis (RO) for the reclamation of ultrafiltered municipal wastewater for irrigation of food crops. RO and NF technologies were evaluated at different applied pressures; the performance of each technology was evaluated in terms of water flux, recovery rate, specific energy consumption and quality of permeate. It was found that the permeate from the reverse osmosis (RO) process complied with Food and Agriculture Organization (FAO) standards at pressures applied between 10 and 18 bar. At an applied pressure of 20 bar, the permeate quality did not comply with irrigation water standards in terms of chloride, sodium and calcium concentration. It was found that nanofiltration process was not suitable for the reclamation of wastewater as the concentration of chloride, sodium and calcium exceeded the allowable limits at all applied pressures. In the reverse osmosis process, the highest recovery rate was 36%, which was achieved at a pressure of 16 bar. The specific energy consumption at this applied pressure was 0.56 kWh/m3. The lowest specific energy of 0.46 kWh/m3 was achieved at an applied pressure of 12 bar with a water recovery rate of 32.7%.

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Advanced treatment of municipal wastewater by nanofiltration: Operational optimization and membrane fouling analysis

Cited by 29 publications

References 23 publications

Membrane Fouling Characteristics of a Side-Stream Tubular Anaerobic Membrane Bioreactor (AnMBR) Treating Domestic Wastewater

Membrane Fouling Characteristics of a Side-Stream Tubular Anaerobic Membrane Bioreactor (AnMBR) Treating Domestic Wastewater

Farklı Özelliklere Sahip Polimerik Membranlarla Evsel Atıksuların Arıtılması

Comparison of Nanofiltration with Reverse Osmosis in Reclaiming Tertiary Treated Municipal Wastewater for Irrigation Purposes

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