Membrane Separation Bioreactors for Wastewater Treatment

Visvanathan, C.; Aïm, R. Ben; Parameshwaran, K.

doi:10.1080/10643380091184165

Cited by 447 publications

(199 citation statements)

References 52 publications

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“…It should be noted that MBR works at relatively high dissolved oxygen concentrations. The shortest HRT mentioned in the literature, not requiring clogging preventing aeration, are in the range of 2-3 h (Visvanathan and Abeynayaka, 2012;Visvanathan et al, 2000). On the other hand, there were noted longer hydraulic retention times preferred for attached biomass reactors (e.g.…”

Section: Hydraulic Retention Timementioning

confidence: 99%

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Effect of thickness of textile filter on organic compounds and nutrients removal efficiency at changeable wastewater surface level

Spychała

Lucyk²

2015

Nauka Przyr. Technol.

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Summary. The aim of the study was to identify the innovative filters' (textile filters for wastewater treatment) thickness impact on dissolved compounds removal efficiency and related: biomass concentration, hydraulic capacity and hydraulic retention time. The study was conducted on septic tank effluent (STE) which was filtered at changeable wastewater surface between 7 cm and 20 cm of height under hydrostatic pressure. The research was performed on filters of thickness: 1.8 mm, 3.6 mm and 7.2 mm. The thinner the filter layer, the lower the total solids content and the higher the hydraulic capacity. The thicker the filter layer, the higher the dissolved compounds removal efficiency. The most efficient in removal were the thickest (eight-layers) filters. The calculated hydraulic retention times were: 0.5, 1.1 and 3.3 h for two-, four-and eight-layer filters, respectively.

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Section: Hydraulic Retention Timementioning

confidence: 99%

“…Other relatively short HRTs (about 4 h) mentioned in the literature are related mostly to submerged membrane bioreactor (Jadhao and Dawande, 2013;Visvanathan et al, 2000). These reactors can be operated at short HRT thanks to the presence of membrane as a device for activated sludge collection.…”

Section: Hydraulic Retention Timementioning

confidence: 99%

Effect of thickness of textile filter on organic compounds and nutrients removal efficiency at changeable wastewater surface level

Spychała

Lucyk²

2015

Nauka Przyr. Technol.

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“…Thus, sewage treatment plant effluents are important sources responsible for occurrence of many micropollutants in downstream water bodies. Compared to CAS, membrane bioreactors (MBR) can achieve better effluent quality regarding basic water quality parameters such as total organic carbon (TOC) and total nitrogen (TN) (Visvanathan et al, 2000). However, the superiority of MBR over CAS in the case of poorly biodegradable micropollutants remains uncertain (Bernhard et al, 2006;Clara et al, 2005;Weiss and Reemtsma, 2008).…”

Section: Introductionmentioning

confidence: 99%

Removal of carbamazepine and sulfamethoxazole by MBR under anoxic and aerobic conditions

Hai

Price

et al. 2011

Bioresource Technology

119

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This study reveals for the first time that near-anoxic conditions (dissolved oxygen, DO = 0.5 mg/L) can be a favourable operating regime for the removal of the persistent micropollutant carbamazepine by MBR treatment. The removal efficiencies of carbamazepine and sulfamethoxazole by an MBR were systematically examined and compared under near-anoxic (DO = 0.5 mg/L) and aerobic (DO > 2 mg/L) conditions. Preliminary batch tests confirmed that sulfamethoxazole is amenable to both aerobic and anoxic biotransformation. However, carbamazepine-a known persistent compound-showed degradation only under an anoxic environment. In good agreement with the batch tests, during near-anoxic operation, under a high loading of 750 µg/L.d, an exceptionally high removal (68±10%) of carbamazepine was achieved. In contrast, low removal efficiency (12±11%) of carbamazepine was observed during operation under aerobic conditions. On the other hand, an average removal efficiency of 65% of sulfamethoxazole was achieved irrespective of the DO concentrations.

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“…Submerged membrane bioreactor, since its introduction in 1980s [2] as a costeffective alternative to sidestream membrane bioreactor (by virtue of eliminating need of recirculation of mixed liquor between bioreactor and membrane unit), over the years has been successfully used to different domestic and industrial wastewater treatment, involving, among others, hollow fiber and flat sheet membranes [3]. Membrane fouling, an inevitable consequence of interactions between membrane and the mixed liquor, however, impedes widespread use of MBR technology.…”

Section: Introductionmentioning

confidence: 99%

Different fouling modes of submerged hollow-fiber and flat-sheet membranes induced by high strength wastewater with concurrent biofouling

2005

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K. (2005). Different fouling modes of submerged hollow-fiber and flat-sheet membranes induced by high strength wastewater with concurrent biofouling. Desalination, 180 (1-3), 89-97. Different fouling modes of submerged hollow-fiber and flat-sheet membranes induced by high strength wastewater with concurrent biofouling Abstract Exploration of two major commercialized flat-sheet and hollow-fiber membranes in a submerged membrane fungi reactor fed with a synthetic textile wastewater revealed striking differences in the extent and mechanism of fouling between the two types, indicating a case-specific scope of choice between the two for industrial wastewater treatment. The hollow-fiber membrane exhibited fouling with a cake layer composed of fungi and starch, intensity being proportional to the operating flux (0.05-0.3 m/d). Conversely, the flat-sheet membrane suffered from immediate internal pore blocking beyond a critical flux of 0.2 m/d. During the experiment with major constituents of the synthetic wastewater separately, while media containing only starch and only dye induced negligible fouling, flux-dependent pore blocking was evident for both the hollow-fiber (0.288 m/d) and flat-sheet membranes (1.3 m/d) for the mixture of starch and dye. Despite a remarkable 99% color and 97% TOC removal achieved by both membranes, fouling with different modes and intensity for the two types under similar conditions and for the same type of membrane under different exposure conditions warrants development of suitable modules for such recalcitrant wastewater. Tokyo, Tokyo,, Japan. AbstractExploration of two major commercialized flat sheet and hollow fiber membranes in a submerged membrane fungi reactor fed with a synthetic textile wastewater revealed striking difference in extent and mechanism of fouling between the two types, indicating case-specific scope of choice between those for industrial wastewater treatment. The hollow fiber membrane exhibited fouling by cake-layer composed of fungi and starch, intensity being proportional to the operating flux (0.05-0.3 m/d). Conversely, the flat sheet membrane suffered from immediate internal pore-blocking beyond a critical flux of 0.2 m/d. During experiment with major constituents of the synthetic wastewater separately, while media containing only starch and only dye induced negligible fouling, flux-dependent pore-blocking emerged in case of both the hollow fiber (0.288 m/d) and flat sheet membranes (1.3 m/d) for the mixture of starch and dye. Despite a remarkable 99% color and 97% TOC removal achieved by both the membranes, fouling with different mode and intensity for the two types of membranes under similar condition, and for the same type of membrane under different exposure condition warrants development of suitable modules for such recalcitrant wastewater.

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Membrane Separation Bioreactors for Wastewater Treatment

Cited by 447 publications

References 52 publications

Effect of thickness of textile filter on organic compounds and nutrients removal efficiency at changeable wastewater surface level

Effect of thickness of textile filter on organic compounds and nutrients removal efficiency at changeable wastewater surface level

Removal of carbamazepine and sulfamethoxazole by MBR under anoxic and aerobic conditions

Different fouling modes of submerged hollow-fiber and flat-sheet membranes induced by high strength wastewater with concurrent biofouling

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