The effect of biomass adsorption on the removal of selected pharmaceutical compounds in an immersed membrane bioreactor system

Dialynas, Emmanuel; Diamadopoulos, Evan

doi:10.1002/jctb.2703

Cited by 24 publications

(10 citation statements)

References 27 publications

(32 reference statements)

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“…This way, PSD provides the necessary information for selecting the optimum treatment technology, as it indicates which size fractions are significant within the overall organic matter content and how they relate to the biodegradation characteristics of the corresponding COD fractions. This information is of vital importance for membrane bioreactor applications …”

Section: Milestones For Future Progressmentioning

confidence: 99%

Evolution of the activated sludge process: the first 50 years

Orhon

2014

J of Chemical Tech & Biotech

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The paper presents a critical overview of the first 50 years in the evolution of the activated sludge process. Recognition of the role of aeration and microbial activity in the purification of sewage in the early studies established the basis for the accidental discovery of the process, which was immediately adapted into practice. The problems encountered during operation started a period of empirical expansion with many process modifications. As scientific support lagged behind practice, efforts were then directed towards exploring and understanding the fundamentals of the system related to substrate removal mechanisms, microbiology, process kinetics and stoichiometry, nitrogen transformations and, then, translating accumulated information into design. Extensive research generated remarkable findings which should be regarded as major milestones for future progress in many areas such as fractionation of substrate and biomass, particle size distribution, and substrate storage. A rational foundation of the activated sludge process for the removal of organic carbon could then be established based on mass balance. This approach also defined essential parameters that could relate microbial reactions involved with plant design and operation. Scientific ideas and discoveries have also enabled conceptual development of many emerging technologies such as the sequencing batch reactor, enhanced biological phosphorus removal, the oxic-settling anaerobic process, and the super-fast membrane bioreactor.

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Section: Milestones For Future Progressmentioning

confidence: 99%

Evolution of the activated sludge process: the first 50 years

Orhon

2014

J of Chemical Tech & Biotech

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“…An alternative to the MSBR is the membrane bioreactor (MBR). This technology has been extensively used for the biological treatment of municipal and industrial wastewaters. MBR is an activated sludge process in which the sedimentation tank is replaced with a usually submerged membrane module and, therefore, like MSBR has the advantage of high biomass retention and low effluent turbidity; its particular mode of operation, however, should result in a lower rate of membrane fouling.…”

Section: Introductionmentioning

confidence: 99%

The biological treatment of high salinity synthetic oilfield produced water in a submerged membrane bioreactor using a halophilic bacterial consortium

Sharghi

Bonakdarpour

Roustazade

et al. 2013

J of Chemical Tech & Biotech

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Background Produced water (PW) is the most important wastewater of the oil industry and if disposed of without adequate treatment can cause serious environmental pollution. Biological treatment is one option explored in recent years for treatment of PW but traditional biological processes potentially fail when the salinity level of the PW is high. In the present study, a halophilic bacterial consortium was employed for treatment of high salinity synthetic PW in a membrane bioreactor (MBR). Results During the 112 days operation of the MBR at hydraulic retention time (HRT) and sludge retention time (SRT) of 48 h and 80 days respectively, there was a consistently low turbidity in the MBR effluent. Oil and grease (O&G) content of the effluent was also consistently below international limits for discharge to the sea or re‐injection to oil wells. With increase in organic loading rate from 0.3 to 0.9 kg COD m−3 d−1, O&G removal efficiency increased from 89.2% to 95.5% whereas chemical oxygen demand (COD) removal efficiency (c. 83%) did not change. Also, the transmembrane pressure during operation of the MBR remained in the range 1–2 kPa. Conclusion The results of the present study indicate the very good potential of the MBR, both in terms of removal performance and membrane fouling, for treatment of high salinity PW. © 2013 Society of Chemical Industry

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“…If this research is applied to a continuous flow reactor, the results and suggestions provided by Dialynas and Diamadopoulos (2012) should be considered. Based on their results, the amounts of each compound that were removed by adsorption resulted from their adsorption to freshly grown biomass, which was equal to the amount wasted per day to maintain a constant level of suspended solids in the mixed liquor of the reactor.…”

Section: Activated and Deactivated Sludgementioning

confidence: 99%

Removal of Estrogens by Activated Sludge Under Different Conditions Using Batch Experiments

Bernardelli

Liz

Belli

et al. 2015

Braz. J. Chem. Eng.

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-Wastewater treatment by deactivated and activated sludge was investigated to evaluate the removal of estrogens [estrone (E1), 17β-estradiol (E2), 17α-ethinylestradiol (EE2)] via adsorption and degradation. Different treatment conditions were used, including three mixed liquor volatile suspended solid (MLVSS) concentrations, three methanol concentrations (carbon source) and three types of aqueous media (water, synthetic solution, and supernatant). The E2 was degraded the fastest by the bacterial community. In all cases the removal rate increased when the initial MLVSS and methanol concentrations increased and when the macro-and micronutrients were present in the solution. In the experiments with deactivated sludge, the synthetic compound EE2 was more easily removed via sorption. The bacterial communities of the activated sludge were studied, which indicated a similarity of more than 75% between the different samples. A similarity of only 50% was found between the activated and deactivated sludges.

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The effect of biomass adsorption on the removal of selected pharmaceutical compounds in an immersed membrane bioreactor system

Abstract: BACKGROUND: The performance of a pilot membrane bioreactor system (MBR) was tested for the treatment of municipal wastewater, with emphasis on the capability for removal of selected pharmaceuticals

Cited by 24 publications

References 27 publications

Evolution of the activated sludge process: the first 50 years

Evolution of the activated sludge process: the first 50 years

The biological treatment of high salinity synthetic oilfield produced water in a submerged membrane bioreactor using a halophilic bacterial consortium

Removal of Estrogens by Activated Sludge Under Different Conditions Using Batch Experiments

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