Enhancing nutrient removal efficiency by changing the internal recycling ratio and position in a pilot-scale MBR process

Kim, Hyoung-Gun; Jang, Ha Nee; Kim, Hye-Min; Lee, Daesung; Eusebio, Ramon Christian; Kim, Han-Seung; Chung, Tae‐Ho

doi:10.1016/j.desal.2010.05.040

Cited by 17 publications

(10 citation statements)

References 21 publications

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“…The average ABR effluent TN was 14 mg L −1 with the removal efficiency of 63% under the high temperature, and the average effluent TN was 9 mg L −1 with the removal efficiency of 77%, revealing that about 14% of TN reduced through SND. It was consistent with the results of Kim et al [16] and Chen et al [17]. Thus, the process has a stable performance on TN removal.…”

Section: Tn Removals In the Processsupporting

confidence: 91%

Effects of temperature on nutrient removal performance of a pilot-scale ABR/MBR combined process for raw wastewater treatment

et al. 2015

Desalination and Water Treatment

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2015):Effects of temperature on nutrient removal performance of a pilot-scale ABR/MBR combined process for raw wastewater treatment, Desalination and Water Treatment, A B S T R A C TFor the purpose of achieving relatively high efficiency, low energy demands, and easy maintenance for nutrient removal, the performance of a pilot-scale biological nutrient removal process consisting of anaerobic baffled reactor and membrane bioreactor has been evaluated for 301 d in treating two kinds of raw wastewaters. The results showed that the process enabled a relatively stable and high performance in both organics and nutrient removals, and high quality effluent was achieved under temperature of 25 ± 5˚C. When the ambient temperature were 10 ± 5 and 35 ± 5˚C, average COD, NH þ 4 -N, TN, and TP removal efficiencies of both kinds wastewaters were more than 88, 87, 70, and 75%, respectively. Analysis of the results by fluorescence in situ hybridization showed that ammonia-oxidizing bacteria, nitrite-oxidizing bacteria, and phosphorus-accumulating organisms were always the enriched micro-organisms in the process during the change of temperature, ensuring the efficient nutrient removal under ambient environment with low energy exhaustion.

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Section: Tn Removals In the Processsupporting

confidence: 91%

Effects of temperature on nutrient removal performance of a pilot-scale ABR/MBR combined process for raw wastewater treatment

et al. 2015

Desalination and Water Treatment

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“…Varying the input of the nitrified sludge to the anoxic tank had no substantial impact on COD elimination probably because organic matter is readily consumed by either anoxic or aerobic microorganisms. [13,15] MEA removal was also unaffected, and complete depletion was observed in all conditions. Lei et al [6] had similar findings, and reported that high MEA biodegradation is feasible in the anoxic tank.…”

Section: Effect Of Sludge Recirculation On Anoxic Denitrification Of mentioning

confidence: 81%

“…Therefore, the better approach is to optimize the sludge recycle ratio R from the aerobic tank to anoxic tank. [13][14][15]35] A certain R exists such that the oxygen consumption of denitrifying bacteria is prevented while nitrogen removal is maximized. The sludge characteristics of the AOMBR were stable by the 70th day of operation, and remained within the range listed in Table 3 from the 90th to 120th day when R was adjusted.…”

Section: Effect Of Sludge Recirculation On Anoxic Denitrification Of mentioning

confidence: 99%

“…Nitrogen removal could be enhanced by modifying bioreactor configuration or parameters, [12][13][14][15] but improvements are limited by the innate characteristics of the waste water. Another way to increase nitrogen removal is to combine the MBR with an advanced oxidation process (AOP) that will convert recalcitrant pollutants into more biodegradable intermediates or mineralize unwanted residues in the effluent.…”

Section: Introductionmentioning

confidence: 99%

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Combined photocatalysis and membrane bioreactor for the treatment of feedwater containing thin film transistor-liquid crystal display discharge

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Semblante

Chen

et al. 2015

Environmental Technology

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The nitrogen content of waste water generated by the thin film transistor-liquid crystal display (TFT-LCD) industry is not satisfactorily removed through the conventional aerobic-activated sludge process. In this study, the performance of three reactors – suspended type TiO2 membrane photoreactor (MPR), anoxic/oxic membrane bioreactor (AOMBR), and their combination (MPR-AOMBR) – was evaluated using feedwater containing TFT-LCD discharge. The parameters that maximized monoethanolamine (MEA) removal in the MPR were continuous ultraviolet (UV) irradiation and pH 11. Among the tested loadings, 0.1 g/l of TiO2 promoted MEA removal but degradation rate may further increase with photocatalyst concentration. The nitrified sludge recycle ratio R of the AOMBR was adjusted to 1.5 to minimize the amount of nitrate in the effluent. The AOMBR greatly decreased chemical oxygen demand and MEA, but removed only 32.7% of tetramethyl ammonium hydroxide (TMAH). The MPR was configured as the pre-treatment unit for AOMBR, and the combined MPR-AOMBR has improved TMAH removal by 80.1%. The MPR bolstered performance by decomposing slowly biodegradable compounds, and had no negative effects on denitrification and carbon removal.

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“…In the MBR tank, phosphorus was removed by means of the biological uptake of phosphorus by the activated sludge bacteria (Kim et al 2010;Peng and Ge 2011). In this study, a steady-state condition was considered to be reached when the variation of the measurements was less than 10 %.…”

Section: Experimental Approachmentioning

confidence: 99%

Mechanism of efficient nutrient removal and microbial analysis of a combined anaerobic baffled reactor–membrane bioreactor process

Song

et al. 2013

Int. J. Environ. Sci. Technol.

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A combined ABR-MBR process consisting of an anaerobic baffled reactor (ABR) combined with an aerobic membrane bioreactor (MBR) treating municipal wastewater was investigated at controlled pH range 6.5-8.5 and at constant temperature 25 ± 1°C. Total nitrogen (TN), ammonia (NH 4 ? -N), total phosphorus (TP), and chemical oxygen demand (COD) removal performances were evaluated by analyzing the mechanism for efficient nutrient removal. The results showed that the average removal rates of COD, NH ? -N, TN, and TP removal rates of 13, 10, and 18 %, respectively, and the membrane retention reduced TP 0.17 mg/L. The process was able to maintain a stable performance with high-quality effluent. Analysis of the results by fluorescence in situ hybridization showed that the abundance of ammonia-oxidizing bacteria, nitriteoxidizing bacteria, and phosphorus accumulating organisms as percentages of all bacteria in each compartment was stable. The enriched microorganisms in the system appear to be the main drivers of the process efficient for nutrient removal.

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Enhancing nutrient removal efficiency by changing the internal recycling ratio and position in a pilot-scale MBR process

Cited by 17 publications

References 21 publications

Effects of temperature on nutrient removal performance of a pilot-scale ABR/MBR combined process for raw wastewater treatment

Effects of temperature on nutrient removal performance of a pilot-scale ABR/MBR combined process for raw wastewater treatment

Combined photocatalysis and membrane bioreactor for the treatment of feedwater containing thin film transistor-liquid crystal display discharge

Mechanism of efficient nutrient removal and microbial analysis of a combined anaerobic baffled reactor–membrane bioreactor process

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