Effect of shear stress and carbon surface roughness on bioregeneration and performance of suspended versus attached biomass in metoprolol-loaded biological activated carbon systems

Abromaitis, Vytautas; Račys, Viktoras; Marel, P. van der; Ni, Gaofeng; Dopson, Mark; Wolthuizen, A. L.; Meulepas, Roel J.W.

doi:10.1016/j.cej.2017.02.097

Cited by 13 publications

(4 citation statements)

References 36 publications

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“…GAC exhibits limited service life of approximately 6-12 months (Simpson, 2008). To maximise GAC lifetime, the biofilm should not only prevent GAC from becoming saturated but also regenerate it after a period of net adsorption (Abromaitis et al, 2017). In bioregeneration, microorganisms regenerate the surface of activated carbon using organic substrate as a source of food and energy.…”

Section: Introductionmentioning

confidence: 99%

Effects of pentachlorophenol load on PCP, COD and NH3-N removal in lab-scale multimedia-sequencing batch biofilm reactor treating recycled paper mill wastewater

Muhamad

Abdullah²,

Hasan³

et al. 2019

JEB

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Discharge of improperly treated paper mill wastewater can be dangerous to the environment. In this study, the effects of pentachlorophenol (PCP) load were investigated and monitored for a year using lab-scale multimedia-sequencing batch biofilm reactor for the removal of PCP, chemical oxygen demand (COD) and ammoniacal nitrogen (NH-N) from recycled paper wastewater. An 18 L reactor 3 composed of Perspex column packed with cylindrical plastic media filled with granular activated carbon (GAC; coconut shells) was used to treat real recycled paper mill effluent with initial COD range of 750-1900-1 mg l at a fixed hydraulic retention time of 24 hr. Three different PCP concentrations (5, 10 and 50 mg) were spiked in the real effluent to evaluate the reactor's performance. PCP removal efficiency decreased from 94% to 61% when PCP concentrations were increased-1-1 from 5 mg l to 50 mg l. In addition, more than 88% of COD was removed, and NH-N was completely 3 eliminated. Both COD and NH-N showed stable removal throughout the study. 3 The overall performance results confirmed that the combination of biofilm and GAC was the best configuration for wastewater treatment as this combination showed good performance efficiency and stable treatment process under stern organic load fluctuations. Therefore, this hybrid system is recommended for the treatment of pulp and paper mill effluents. Multimedia, Pentachlorophenol, Recycled paper mill wastewater, Sequencing batch biofilm reactor The present study aimed to evaluate the effect of PCP load on PCP, chemical oxygen demand and ammoniacal nitrogen removal from recycled paper mill effluent in a lab-scale MM-SBBR system.

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Section: Introductionmentioning

confidence: 99%

Effects of pentachlorophenol load on PCP, COD and NH3-N removal in lab-scale multimedia-sequencing batch biofilm reactor treating recycled paper mill wastewater

Muhamad

Abdullah²,

Hasan³

et al. 2019

JEB

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show abstract

“…Additionally, adsorption can buffer shock loads (Bourneuf et al, 2016;Cha et al, 1998;Li and Moe, 2005), remove degradation products and reduce the effect of toxic or inhibitory compounds that might be present in the water (Çeçen and Aktaş, 2012). Moreover, the rough surface of GAC protects the biofilm from shear stress (Abromaitis et al, 2017). Finally, desorption of previously adsorbed molecules results in a second flux of substrate to the biofilm from the GAC, allowing biomass to be active at higher biofilm depths (Herzberg et al, 2006).…”

Section: Synergy Between Adsorption and Biodegradationmentioning

confidence: 99%

“…The backwash regime is an important tool in maintaining a desired level of biomass activity in the filter and removing weakly attached biomass (Flemming, 2020;Gibert et al, 2013). However, a balance needs to be found since high biofilm density caused by elevated shear stress can negatively affect GAC bioregeneration (Abromaitis et al, 2017).…”

Section: In Situ Vs Offline Bioregenerationmentioning

confidence: 99%

“…If adsorption and biodegradation occur simultaneously (in situ bioregeneration), quantifying bioregeneration is less straight-forward. Abromaitis et al (2017) studied GAC bioregeneration in inoculated filters treating influent containing metoprolol. The authors assessed the effects of in situ bioregeneration by comparing adsorption capacity, micropore volume and micropollutant removal after peak load for fresh, bioregenerated and nonbioregenerated GAC.…”

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confidence: 99%

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Micropollutants removal with activated carbon : Adsorption and regeneration by biodegradation

Piai¹

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Hydrophilic organic micropollutants are commonly detected in source water used for drinking water production. Effective technologies to remove these micropollutants from water include adsorption onto granular activated carbon in fixed-bed filters. The ratedetermining step in adsorption using activated carbon is usually the adsorbate diffusion inside the porous adsorbent. The presence of mesopores can facilitate diffusion, resulting in higher adsorption rates. We used two different types of granular activated carbon, with and without mesopores, to study the adsorption rate of hydrophilic micropollutants. Furthermore, equilibrium studies were performed to determine the affinity of the selected micropollutants for the activated carbons. A pore diffusion model was applied to the kinetic data to obtain pore diffusion coefficients. We observed that the adsorption rate is influenced by the molecular size of the micropollutant as well as the granular activated carbon pore size.

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Bioregeneration of spent activated carbon: Review of key factors and recent mathematical models of kinetics

Leong

Loo

Bashir

et al. 2018

Chinese Journal of Chemical Engineering

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Effect of shear stress and carbon surface roughness on bioregeneration and performance of suspended versus attached biomass in metoprolol-loaded biological activated carbon systems

Cited by 13 publications

References 36 publications

Effects of pentachlorophenol load on PCP, COD and NH3-N removal in lab-scale multimedia-sequencing batch biofilm reactor treating recycled paper mill wastewater

Effects of pentachlorophenol load on PCP, COD and NH3-N removal in lab-scale multimedia-sequencing batch biofilm reactor treating recycled paper mill wastewater

Micropollutants removal with activated carbon : Adsorption and regeneration by biodegradation

Bioregeneration of spent activated carbon: Review of key factors and recent mathematical models of kinetics

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