Optimization of Biological Nutrient Removal in a Membrane Bioreactor System

Patel, Jignesh; Nakhla, George; Margaritis, Argyrios

doi:10.1061/(asce)0733-9372(2005)131:7(1021)

Cited by 29 publications

(12 citation statements)

References 27 publications

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“…The entire period represents the period for which the system was run for the SWW and MWW, while the steady‐state run represents the period of last turnover of the SRT. The details of the SWW run are reported elsewhere ( Patel et al, 2005 ), and, for the sake of brevity, the discussion will mainly focus on the MWW data. The system performance was remarkable in terms of effluent NH 4 + ‐N, total nitrogen, and total phosphorus at a total HRT of 6 hours compared with conventional BNR processes.…”

Section: Resultsmentioning

confidence: 99%

Simultaneous Nitrification and Denitrification with Anoxic Phosphorus Uptake in a Membrane Bioreactor System

Patel

Nakhla²

2006

Water Environment Research

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The performance of an innovative membrane bioreactor (MBR) process using anoxic phosphorus uptake with nitrification and denitrification for the treatment of municipal wastewater with respect to operational performance and effluent quality is addressed in this paper. The system was operated at steady-state conditions with a synthetic acetate-based wastewater at a hydraulic retention time (HRT) of 12 hours and on degritted municipal wastewater at a total system HRT of 6 hours. The MBR system was able to achieve 99% biochemical oxygen demand (BOD), chemical oxygen demand (COD), and ammonia-nitrogen (NH 4 1 -N); 98% total Kjeldahl nitrogen (TKN); and 97% phosphorus removal, producing effluent BOD, COD, NH 4 1 -N, TKN, nitrate-nitrogen, nitrite-nitrogen, and phosphate-phosphorus of ,3, 14, 0.2, 0.26, 5.8, 0.21, and ,0.01 mg/L, respectively, at the 6-hour HRT. The comparison of the synthetic and municipal wastewater run is presented in this paper. Steady-state mass balance on municipal wastewater was performed to reveal some key features of the modified MBR system. Water Environ. Res., 78, 2193Res., 78, (2006.

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Section: Resultsmentioning

confidence: 99%

Simultaneous Nitrification and Denitrification with Anoxic Phosphorus Uptake in a Membrane Bioreactor System

Patel

Nakhla²

2006

Water Environment Research

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“…The high P-removal of more than 70% was achieved even with the long solids retention time (SRT) of 72 days without any external carbon sources. Adam et al [15] and Patel et al [16] reported the successful EBPR with the modified MBR systems with the SRT of 20 days and with a high ratio of short chain volatile fatty acids (VFAs) to total phosphorus in the feed [17]. Lesjean et al [18] installed a sidestream membrane unit combined with a University of Cape Town (UCT) process in a pilot plant scale, which provided anaerobic, anoxic, post-anoxic and aerobic stages, consecutively, in a separated reactor with a two-way internal recycle; one was from the anoxic to the anaerobic reactor, and the other from the aerobic to the post-anoxic reactor.…”

Section: Introductionmentioning

confidence: 97%

Contribution of microfiltration on phosphorus removal in the sequencing anoxic/anaerobic membrane bioreactor

Cho

Song

Ahn

2008

Bioprocess Biosyst Eng

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This study investigated the contribution of microfiltration to phosphorus removal in the sequencing anoxic/anaerobic membrane bioreactor. The phosphorus content in activated sludge was fractionated by the Schmidt-Thannhauser-Schneider method. The size distribution of phosphorus in the influent was analyzed to estimate the portion of particulate phosphorus rejected physically by the 0.2 mum microfiltration. The result was that along with the high removal of phosphorus (83%) the phosphorus content of activated sludge was measured as 58.66 mgP/gVSS corresponding to 5.87% on dry weight basis. About 9% of total phosphorus was chemically precipitated phosphates while 56% was stored inside the microbial cell by activity of PAOs, and 35% was the sum of minor intracellular compositions and the particulate residuals, which could be rejected completely by the microfiltration. The biological activity is the dominant way of phosphorus removal in the process. However, the microfiltration also contributed significantly to phosphorus removal by retaining the particulate phosphorus inside the system.

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“…Furthermore, MBR shows its capability to remove both TN and TP by combining membrane technology with the conventional BNR systems (Ahn et al 2003;Patel et al 2005). MBR is now described to sustain a higher effluent quality, less space, stronger disinfection capability, and higher volumetric loading (Adham et al 2001;Wei et al 2003) than conventional processes.…”

Section: Introductionmentioning

confidence: 98%

Enhanced reduction of excess sludge and nutrient removal in a pilot-scale A2O-MBR-TAD system

Ventura

Seo

Chung

et al. 2011

Water Science and Technology

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In this study, a pilot scale anaerobic-anoxic-oxic (A2O) process with submerged membrane (MBR) in the oxic tank was coupled with thermophilic aerobic digestion (TAD) reactor and was operated for longer than 600 days to treat real domestic wastewater. Regardless of the varying conditions of the system, the A2O-MBR-TAD process removed MLSS, TCOD, BOD, TN, TP, and E. coli about 99%, 96%, 96%, 70%, 83%, and 99%, respectively. The additional TP removal of the system was due to the precipitating agent directly added in the oxic reactor, without which TP removal was about 56%. In the TAD reactor, receiving MLSS from the oxic tank (MBR), about 25% of TSS and VSS were solubilized during 2 days of retention. The effluent of the TAD reactor was recycled into the anoxic tank of A2O-MBR to provide organic carbon for denitrification and cryptic growth. By controlling the flowrate of wasting stream from the MBR, sludge production decreased to almost zero. From these results, it was concluded that the A2O-MBR-TAD process could be a reliable option for excellent effluent quality and near zero-sludge production.

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Optimization of Biological Nutrient Removal in a Membrane Bioreactor System

Cited by 29 publications

References 27 publications

Simultaneous Nitrification and Denitrification with Anoxic Phosphorus Uptake in a Membrane Bioreactor System

Simultaneous Nitrification and Denitrification with Anoxic Phosphorus Uptake in a Membrane Bioreactor System

Contribution of microfiltration on phosphorus removal in the sequencing anoxic/anaerobic membrane bioreactor

Enhanced reduction of excess sludge and nutrient removal in a pilot-scale A2O-MBR-TAD system

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