Impact of methanogenic pre-treatment on the performance of an aerobic MBR system

Sánchez, Antonio F. Rial; Buntner, Dagmara; Garrido, Juan Manuel Méndez

doi:10.1016/j.watres.2012.11.042

Cited by 17 publications

(8 citation statements)

References 28 publications

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“…Therefore, adequate removal of the solids before the submerged HF module is key to mitigating blocking. Methanogenic [125] and chlorinated [126] pretreatments have also been explored, as well as hybrid processes, both of which add an additional unit operation before the membrane module [127][128][129][130]. With respect to (ii), physical cleaning tends to remove reversible fouling while chemical cleaning can remove some irreversible fouling.…”

Section: Blocking and Blocking Mitigation In Submerged Hf Modulesmentioning

confidence: 99%

The Performance and Fouling Control of Submerged Hollow Fiber (HF) Systems: A Review

et al. 2017

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Abstract:The submerged membrane filtration concept is well-established for low-pressure microfiltration (MF) and ultrafiltration (UF) applications in the water industry, and has become a mainstream technology for surface-water treatment, pretreatment prior to reverse osmosis (RO), and membrane bioreactors (MBRs). Compared to submerged flat sheet (FS) membranes, submerged hollow fiber (HF) membranes are more common due to their advantages of higher packing density, the ability to induce movement by mechanisms such as bubbling, and the feasibility of backwashing. In view of the importance of submerged HF processes, this review aims to provide a comprehensive landscape of the current state-of-the-art systems, to serve as a guide for further improvements in submerged HF membranes and their applications. The topics covered include recent developments in submerged hollow fiber membrane systems, the challenges and developments in fouling-control methods, and treatment protocols for membrane permeability recovery. The highlighted research opportunities include optimizing the various means to manipulate the hydrodynamics for fouling mitigation, developing online monitoring devices, and extending the submerged HF concept beyond filtration.

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Section: Blocking and Blocking Mitigation In Submerged Hf Modulesmentioning

confidence: 99%

The Performance and Fouling Control of Submerged Hollow Fiber (HF) Systems: A Review

et al. 2017

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“…Volatile fatty acids (VFA) were determined using gas chromatography with a flame ionization detector following the method described elsewhere . Biogas production was measured using a Milli GasCounter MGC‐10 (Ritter, Germany) and its composition was measured in a gas chromatograph as described previously …”

Section: Methodsmentioning

confidence: 99%

“…26 Biogas production was measured using a Milli GasCounter MGC-10 (Ritter, Germany) and its composition was measured in a gas chromatograph as described previously. 23 Biomass concentration in the biofilm attached to the plastic support was also determined. Ten plastic supports were sonicated for 10 min in 100 mL of permeate at 65% of amplitude using a probe sonicator (UP200s, Dr. Hielscher).…”

Section: Experimental Set-upmentioning

confidence: 99%

“…22 Moreover, Kampman et al 19 estimated that approximately 50% of the produced biomass was washed from a sequencing batch reactor in which the growth of the newly discovered anaerobic denitrifying methanotrophic biomass was promoted. Thus, membrane reactor (MBR) systems could enhance denitrification coupled to methane oxidation due to the high sludge concentrations in these systems (typically between 8 and 12 gMLVSS L −1 for submerged MBR systems), 23,24 allowing complete microbial retention in the system by the membrane. 20,23 The main objective of this research was to study denitrification coupled with methane oxidation in an MBR by using the dissolved methane present in the effluent of an anaerobic UASB system.…”

Section: Introductionmentioning

confidence: 99%

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Denitrification coupled with methane oxidation in a membrane bioreactor after methanogenic pre‐treatment of wastewater

Sánchez

Rodríguez-Hernández

Buntner

et al. 2016

J of Chemical Tech & Biotech

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BACKGROUND The presence of dissolved methane is an important environmental problem related to greenhouse gas emissions from wastewater treated in methanogenic bioreactors. Methane has a global warming potential of 28. For low‐strength wastewaters, such as sewage, dissolved methane could account for up to 50% of the total methane produced. Dissolved methane is easily desorbed from effluents when released into the environment or post‐treated in aerobic bioreactors. The use of dissolved methane as a carbon source for biological denitrification has been proposed as an alternative for reducing both greenhouse gas emissions and nitrogen concentrations in treated wastewater. RESULTS The effluent of a methanogenic reactor operating at ambient temperature was post‐treated in a two‐compartment biological membrane bioreactor (MBR). The first compartment consisted of an anoxic denitrification reactor in which dissolved methane was oxidized. The second compartment was an aerobic membrane filtration reactor. Up to 60% nitrogen removal and 95% methane consumption were observed. Batch experiments indicated the presence of microorganisms that were capable of denitrification using dissolved methane. CONCLUSIONS Denitrification using dissolved methane as a carbon source was feasible in an anoxic–aerobic MBR system. Denitrification resulted from a mixture of aerobic and anaerobic methane oxidizing bacteria, anammox and heterotrophic bacteria activity. © 2016 Society of Chemical Industry

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“…The latter along with simple operation, limited land requirements and the ability to 8 treat at high rate (i.e. at low HRTs) justify the wide UASB application in developing tropical countries [41][42][43].…”

Section: Technologies For the Biological Treatment Of Industrial Wastmentioning

confidence: 99%

A Mini Review of the Techno-environmental Sustainability of Biological Processes for the Treatment of High Organic Content Industrial Wastewater Streams

Massara

Komesli

Sözüdoğru

et al. 2017

Waste Biomass Valor

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Industrial wastewater contains complex and slowly biodegradable compounds often ineffectively treated by conventional activated sludge (CAS) systems. Alternatively, advanced anaerobic technologies are implemented. The current study reviews different potential anaerobic schemes, factors influencing their final performance and optimum combinations of operational/design parameters. Anaerobic membrane bioreactors, upflow anaerobic sludge blanket reactors, expanded granular sludge beds, anaerobic hybrid reactors and inverse fluidized bed reactors are discussed. Their major advantages include: low energy requirements, energy recovery through biogas generation and high organic load removal. pH~7, operation in a mesophilic environment and a hydraulic retention time long enough to enable anaerobic digestion in economically accepted reactor volumes are conditions that optimize the performance of anaerobic configurations. The evaluation additionally considers environmental aspects. The life cycle assessment of anaerobic industrial wastewater treatment reveals its positive environmental effect in terms of greenhouse gases emissions. Methane (a greenhouse gas) primarily contained in the biogas, despite being produced during anaerobic digestion, is utilized for energy production (heating, electricity) instead of being emitted to the atmosphere. Finally, anaerobic wastewater treatment is analyzed as part of the European Commission Innovation Deal that aims at converting conventional wastewater treatment plants to water resource recovery facilities able to combine sustainable wastewater treatment and water reuse. Response to Reviewers: Reviewer #1: The topic and the results of the current study are generally very

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Impact of methanogenic pre-treatment on the performance of an aerobic MBR system

Cited by 17 publications

References 28 publications

The Performance and Fouling Control of Submerged Hollow Fiber (HF) Systems: A Review

The Performance and Fouling Control of Submerged Hollow Fiber (HF) Systems: A Review

Denitrification coupled with methane oxidation in a membrane bioreactor after methanogenic pre‐treatment of wastewater

A Mini Review of the Techno-environmental Sustainability of Biological Processes for the Treatment of High Organic Content Industrial Wastewater Streams

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