Novel staged anaerobic fluidized bed ceramic membrane bioreactor: Energy reduction, fouling control and microbial characterization

Aslam, Muhammad; Yang, Peixian; Lee, Po‐Heng; Kim, Jeong‐Hwan

doi:10.1016/j.memsci.2018.02.038

Cited by 89 publications

(21 citation statements)

References 58 publications

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“…Rather young applications for ultrafiltration of biological suspensions are anaerobic membrane bioreactors [7][8][9] and the recovery of nutrients from manure and anaerobic digestates [10,11]. Anaerobic digestate is a side product of sewage sludge, animal waste, or energy crop fermentation in biogas plants.…”

Section: Introductionmentioning

confidence: 99%

Influence of Ozone Treatment on Ultrafiltration Performance and Nutrient Flow in a Membrane Based Nutrient Recovery Process from Anaerobic Digestate

Gienau¹,

Ehrmanntraut

Kraume

et al. 2020

Membranes

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Membrane filtration of biological suspensions is frequently limited by fouling. This mechanism is well understood for ultrafiltration of activated sludge in membrane bioreactors. A rather young application of ultrafiltration is the recovery of nutrients from anaerobic digestates, e.g., from agricultural biogas plants. A process chain of solid/liquid separation, ultrafiltration, and reverse osmoses separates the digestate into different products: an organic N-P-fertilizer (solid digestate), a recirculate (UF retentate), a liquid N-K-fertilizer (RO retentate) and water. Despite the preceding particle removal, high crossflow velocities are required in the ultrafiltration step to overcome fouling. This leads to high operation costs of the ultrafiltration step and often limits the economical application of the complete process chain. In this study, under-stoichiometric ozone treatment of the ultrafiltration feed stream is investigated. Ozone treatment reduced the biopolymer concentration and apparent viscosity of different digestate centrates. Permeabilities of centrate treated with ozone were higher than without ozone treatment. In a laboratory test rig and in a pilot plant operated at the site of two full scale biogas plants, ultrafiltration flux could be improved by 50–80% by ozonation. Nutrient concentrations in the fertilizer products were not affected by ozone treatment.

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Section: Introductionmentioning

confidence: 99%

Influence of Ozone Treatment on Ultrafiltration Performance and Nutrient Flow in a Membrane Based Nutrient Recovery Process from Anaerobic Digestate

Gienau¹,

Ehrmanntraut

Kraume

et al. 2020

Membranes

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“…However, production of biofuel through microalgae is impeded by many commercialization challenges such as deficiency of energy and cost-intensive processes for algae growth and harvesting with a significant amounts of nutrients needed like nitrogen (N) and phosphorous (P), with conventional cultivation methods [5]. Moreover, membrane integrated systems are emerging as potential alternatives not only in microalgae cultivation and harvesting but also to produce and recover biofuels such as biogas, bio-hydrogen, biodiesel, bioethanol, and other value-added products [6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Microalgae-based biofuels, resource recovery and wastewater treatment: A pathway towards sustainable biorefinery

Javed

Aslam

Rashid

et al. 2019

Fuel

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165

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Intense utilization of natural fuel resources is threatening the global environment and societal sustainability. It triggers up the need for finding environmental-friendly and sustainable sources of energy. In this perspective, microalgae have emerged as a potential alternative. Microalgae are featured with distinct ability to provide ecological services and respond to the sustainability challenges simultaneously. Microalgae can fix atmospheric CO2, valorize waste resources, and can produce a wide variety of bio-products. The promising features of microalgae pitch the idea of establishing a sustainable bio-refinery to draw multifaceted benefits and reinforce the objectives of resource efficient bio-economy. Unfortunately, in the last few years, preferential studies have been carried out to assess the potential of microalgae-based integrated bio-refinery. This review critically discussed the recent developments, opportunities, and barriers in the microalgae bioindustry and wastewater treatment. Particularly, microalgae potentials for biofuels and resources recovery are addressed towards sustainable biorefinery. Moreover, techno-economic and 2 commercial viability of microalgae-led bio-refinery is reviewed to drive this technology towards practicality.

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“…Several authors reported fluxes < 10 L/m 2 h [4][5][6][7]. Many efforts have been done to improve the flux of AnMBRs such as dosing powdered activated carbon (PAC), applying turbulence promoters and gas-liquid two-phase flow [6,[8][9][10][11][12][13][14][15]. The effect of dosing PAC on membrane fouling in AnMBR was found to be insignificant [7].…”

Section: Introductionmentioning

confidence: 99%

Impact of adding aluminum hydroxyl chloride on membrane flux in an anaerobic membrane bioreactor

Yang

Spanjers

Lier

2020

Journal of Water Process Engineering

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Coagulant addition and improved mixing conditions have been used in anaerobic membrane bioreactors (AnMBR) to improve membrane performance. Before coagulant was added, a flux of 8 L/m 2 h was applicable and transmembrane pressure (TMP) increased from 1 kPa to 10 kPa in 5 days. However, after the coagulant was added, a flux as high as 50 L/m 2 h was achieved with no noticeable increase in TMP during six hours of operation. Furthermore, at the same high flux, a long-term experiment showed that TMP increased to approximately 3 kPa in 20 days. Apparently, the applied coagulant significantly improved membrane performance. The reduction in the number of small particles was identified as the main cause for the high flux. However, the number of submicon particles increased in the long-term experiment. In addition, a model was developed that adequately described the TMP development in the short-term and long-term experiments. According to this model, the deterioration in specific cake resistance resulted in a sharp TMP increase in the long-term experiment. In addition, experiments showed that the effect of coagulant on sludge activity was minimal. This study demonstrated that the applied coagulant and reactor operation conditions (mixing properties) have potentials of interest for improving the membrane flux in AnMBR.

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Novel staged anaerobic fluidized bed ceramic membrane bioreactor: Energy reduction, fouling control and microbial characterization

Cited by 89 publications

References 58 publications

Influence of Ozone Treatment on Ultrafiltration Performance and Nutrient Flow in a Membrane Based Nutrient Recovery Process from Anaerobic Digestate

Influence of Ozone Treatment on Ultrafiltration Performance and Nutrient Flow in a Membrane Based Nutrient Recovery Process from Anaerobic Digestate

Microalgae-based biofuels, resource recovery and wastewater treatment: A pathway towards sustainable biorefinery

Impact of adding aluminum hydroxyl chloride on membrane flux in an anaerobic membrane bioreactor

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