Adsorption and bioadsorption of granular activated carbon (GAC) for dissolved organic carbon (DOC) removal in wastewater

Xing, W.; Ngo, Huu Hao; Kim, S.H.; Guo, Wenshan; Hagare, Dharmappa

doi:10.1016/j.biortech.2008.04.012

Cited by 92 publications

(39 citation statements)

References 12 publications

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“…Also, the study of adsorption kinetics is highly relevant to the design of an adsorption system because it provides beneficial information in the reaction pathway, rate of adsorption and adsorption mechanism of adsorbate onto adsorbent [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Equilibrium and kinetic studies on free cyanide adsorption from aqueous solution by activated carbon

Behnamfard

Salarirad

2009

Journal of Hazardous Materials

161

106

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Section: Introductionmentioning

confidence: 99%

Equilibrium and kinetic studies on free cyanide adsorption from aqueous solution by activated carbon

Behnamfard

Salarirad

2009

Journal of Hazardous Materials

161

106

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“…Numerous studies have reported that GAC biofilm treatments exhibited simultaneous adsorption and biodegradation mechanisms for the removal of organic compounds from other wastewater matrices (77)(78)(79). This combination indicates the ability of GAC to bioregenerate due to the biodegradation activity of microorganisms colonizing the external surface and macropores of the GAC (80). The combined effect of adsorption and biodegradation on contaminant removal rates is dependent on the microbial abundances and compositions, their metabolic rates, and the biofilm retention time.…”

Section: Characterization Of Biofilm (I) Confocal Imagingmentioning

confidence: 97%

Next-Generation Pyrosequencing Analysis of Microbial Biofilm Communities on Granular Activated Carbon in Treatment of Oil Sands Process-Affected Water

Islam

Zhang

McPhedran

et al. 2015

Appl Environ Microbiol

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The development of biodegradation treatment processes for oil sands process-affected water (OSPW) has been progressing in recent years with the promising potential of biofilm reactors. Previously, the granular activated carbon (GAC) biofilm process was successfully employed for treatment of a large variety of recalcitrant organic compounds in domestic and industrial wastewaters. In this study, GAC biofilm microbial development and degradation efficiency were investigated for OSPW treatment by monitoring the biofilm growth on the GAC surface in raw and ozonated OSPW in batch bioreactors. The GAC biofilm community was characterized using a next-generation 16S rRNA gene pyrosequencing technique that revealed that the phylum Proteobacteria was dominant in both OSPW and biofilms, with further in-depth analysis showing higher abundances of Alpha-and Gammaproteobacteria sequences. Interestingly, many known polyaromatic hydrocarbon degraders, namely, Burkholderiales, Pseudomonadales, Bdellovibrionales, and Sphingomonadales, were observed in the GAC biofilm. Ozonation decreased the microbial diversity in planktonic OSPW but increased the microbial diversity in the GAC biofilms. Quantitative real-time PCR revealed similar bacterial gene copy numbers (>10 9 gene copies/g of GAC) for both raw and ozonated OSPW GAC biofilms. The observed rates of removal of naphthenic acids (NAs) over the 2-day experiments for the GAC biofilm treatments of raw and ozonated OSPW were 31% and 66%, respectively. Overall, a relatively low ozone dose (30 mg of O 3 /liter utilized) combined with GAC biofilm treatment significantly increased NA removal rates. The treatment of OSPW in bioreactors using GAC biofilms is a promising technology for the reduction of recalcitrant OSPW organic compounds.O pen-pit mining of Canada's Athabasca oil sands produces large quantities of bitumen coated sands. The bitumen is extracted from the sands using the Clark hot-water process, in which 1 m 3 of bitumen extracted from oil sands generates 4 m 3 of oil sands process-affected water (OSPW) (1-3). Over a billion cubic meters of this generated OSPW is currently stored in tailing ponds given the no-release policy for OSPW followed by the oil sands companies (4, 5). This volume of OSPW will continually increase as the oil sands bitumen extraction continues in the Athabasca region until suitable treatment technologies become available to allow for OSPW release (2). This OSPW is contaminated with a large number of inorganic and organic compounds during the extraction process that are known to be toxic to aquatic and terrestrial life (6). Thus, the production of OSPW associated with the extraction of oil sands bitumen is a great environmental issue that needs to be addressed in the near future for the remediation of the oil sands region.Fresh OSPW has acute, subchronic, and chronic toxicities to aquatic organisms, and the majority of this toxicity has been previously attributed to naphthenic acids (NAs) (2, 7). NAs are a mixture of organic surfactants containing carboxy...

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“…It enables microorganisms to form a biofilm or biomass that decomposes AOC (Takeuchi et al 1997) in water. The lifetime of GAC in BACF is extended by a biofilm reducing the cost of regeneration (Xing et al 2008). BACF can remove biodegradable organic matter, reduce chlorine dosage, remove bad-smelling substances or other micro-pollutants (TOC, DOC, UV 254 , and AOC), and improve the sensation of drinking water in the taste of mouth (Huang et al 2002).…”

Section: Introductionmentioning

confidence: 99%

Comparing removal of trace organic compounds and assimilable organic carbon (AOC) at advanced and traditional water treatment plants

Lou

Chung-Yi

Han

et al. 2011

Environ Monit Assess

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Stability of drinking water can be indicated by the assimilable organic carbon (AOC). This AOC value represents the regrowth capacity of microorganisms and has large impacts on the quality of drinking water in a distribution system. With respect to the effectiveness of traditional and advanced processing methods in removing trace organic compounds (including TOC, DOC, UV(254), and AOC) from water, experimental results indicate that the removal rate of AOC at the Cheng Ching Lake water treatment plant (which utilizes advanced water treatment processes, and is hereinafter referred to as CCLWTP) is 54%, while the removal rate of AOC at the Gong Yuan water treatment plant (which uses traditional water treatment processes, and is hereinafter referred to as GYWTP) is 36%. In advanced water treatment units, new coagulation-sedimentation processes, rapid filters, and biological activated carbon filters can effectively remove AOC, total organic carbon (TOC), and dissolved organic carbon (DOC). In traditional water treatment units, coagulation-sedimentation processes are most effective in removing AOC. Simulation results and calculations made using the AutoNet method indicate that TOC, TDS, NH(3)-N, and NO(3)-N should be regularly monitored in the CCLWTP, and that TOC, temperature, and NH(3)-N should be regularly monitored in the GYWTP.

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Adsorption and bioadsorption of granular activated carbon (GAC) for dissolved organic carbon (DOC) removal in wastewater

Cited by 92 publications

References 12 publications

Equilibrium and kinetic studies on free cyanide adsorption from aqueous solution by activated carbon

Equilibrium and kinetic studies on free cyanide adsorption from aqueous solution by activated carbon

Next-Generation Pyrosequencing Analysis of Microbial Biofilm Communities on Granular Activated Carbon in Treatment of Oil Sands Process-Affected Water

Comparing removal of trace organic compounds and assimilable organic carbon (AOC) at advanced and traditional water treatment plants

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