Enhancing the removal of pollutants from coke wastewater by bioaugmentation: A scoping study

Raper, Eleanor; Stephenson, Tom; Simoes, Francisco; Fisher, Raymond; Anderson, David R.; Soares, Ana

doi:10.1002/jctb.5607

Cited by 11 publications

(7 citation statements)

References 47 publications

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“…Removal efficiencies of SCNwere comparable to those reported by Kim et al (2011Kim et al ( , 2008 in a laboratory-scale anoxic-aerobic ASP. Degradation of SCNhas been reported to be possible by a wide variety of bacteria under a wide range of conditions (Raper et al, 2018a). Removal of SCNwas complete in the anoxic reactor of the pilot-scale anoxicaerobic ASP (Figure 3 and Figure 4) showing capability of the bacteria to degrade SCNunder anoxic conditions.…”

Section: Coke Making Wastewater Composition and Pilot-plant Operationmentioning

confidence: 90%

“…Several factors have been associated with the accumulation of NO 2 --N during the denitrification process including the type of carbon (Rocher et al, 2015), reactor pH (Cao et al, 2013), the rate of NO 3 --N and NO 2 --N reduction (Philips et al, 2002) and the abundance of species present (Philips et al, 2002). representing a significant abundance (11%) in the bacterial composition of the activated sludge used in this study (Raper et al, 2018a). Whilst some species of Rhodanobacter (Rhodanobacter denitrificans) have been associated with complete denitrification (Prakash et al, 2012) (Lee et al, 2007).…”

Section: Nitrite Removal In the Anoxic-aerobic Reactormentioning

confidence: 99%

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Nitrogen removal from coke making wastewater through a pre-denitrification activated sludge process

Raper

Fisher

Anderson

et al. 2019

Science of The Total Environment

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Under the Industrial Emissions Directive (IED), coke production wastewater must be treated to produce an effluent characterised by a total nitrogen (TN) <50 mg/L. An anoxic-aerobic activated sludge pilot-plant (1 m 3) fed with coke production wastewater was used to investigate the optimal operational requirements to achieve such an effluent. The loading rates applied to the pilot-plant varied between 0.198-0.418 kg COD/m 3 .day and 0.029-0.081 kg TN/m 3 .day, respectively. The ammonia (NH 4 +-N) removals were maintained at 96%, after alkalinity addition. Under all conditions, phenol and SCNremained stable at 96% and 100%, respectively with both being utilised as carbon sources during denitrification. The obtained results showed that influent soluble chemical oxygen demand (sCOD) to TN ratio of should be maintained at >5.7 to produce an effluent TN <50 mg/L. Furthermore, nitrite accumulation was observed under all conditions indicating a disturbance to the denitrification pathway. Overall, the anoxic-aerobic activated sludge process was shown to be a robust and reliable technology to treat coke making wastewater and achieve the IED requirements.

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Section: Coke Making Wastewater Composition and Pilot-plant Operationmentioning

confidence: 90%

Section: Nitrite Removal In the Anoxic-aerobic Reactormentioning

confidence: 99%

Nitrogen removal from coke making wastewater through a pre-denitrification activated sludge process

Raper

Fisher

Anderson

et al. 2019

Science of The Total Environment

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“…In the last years, several novel species and genera have been described from such bioreactors (Cao et al 2014;Felföldi et al 2011Felföldi et al , 2014aGeng et al 2014Geng et al , 2015Ren et al 2015). Isolated strains and cocultures contribute to understand the ecology and phenotypic features of bacteria, therefore describing global biodiversity, but they can be also applied for bioaugmentation to enhance the performance of the biological treatment unit and community assembly during reactor setup or after a reactor failure (Raper et al 2018b;Zhu et al 2015Zhu et al , 2018.…”

Section: Conclusion For Future Biologymentioning

confidence: 99%

Biological treatment of coke plant effluents: from a microbiological perspective

et al. 2020

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During coke production, large volume of effluent is generated, which has a very complex chemical composition and contains several toxic and carcinogenic substances, mainly aromatic compounds, cyanide, thiocyanate and ammonium. The composition of these high-strength effluents is very diverse and depends on the quality of coals used and the operating and technological parameters of coke ovens. In general, after initial physicochemical treatment, biological purification steps are applied in activated sludge bioreactors. This review summarizes the current knowledge on the anaerobic and aerobic transformation processes and describes key microorganisms, such as phenol- and thiocyanate-degrading, floc-forming, nitrifying and denitrifying bacteria, which contribute to the removal of pollutants from coke plant effluents. Providing the theoretical basis for technical issues (in this case the microbiology of coke plant effluent treatment) aids the optimization of existing technologies and the design of new management techniques.

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“…The average wastewater volume varies from 0.15 to 0.35 m 3 /t carbon. The application of conventional treatment methods, based on the activated sludge technology, is not always efficient, due to, among other factors, the significant variability in coke wastewater composition, depending on the type of coal and the coal processing technology used [10][11][12][13]. Therefore, in order to ensure the appropriate treatment outcome, it is very important to use (besides the biological activated sludge method) supporting and supplementing physicochemical processes responsible for the preliminary decomposition of these toxic and non-biodegradable organic compounds.…”

Section: Introductionmentioning

confidence: 99%

The Impact of an Ultrasonic Field on the Efficiency of Coke Wastewater Treatment in a Sequencing Batch Reactor

Kwarciak‐Kozłowska

Worwąg

2021

Energies

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The growing production of coke and, consequently, coke wastewater is a significant problem for the environment. Coke wastewater, because it contains high amounts of toxic substances, is classified as an extremely hazardous industrial wastewater. The treatment of such wastewater requires a combination of advanced physicochemical and biological methods. The aim of the research was to investigate the effectiveness of the application of the ultrasonic disintegration of coke wastewater in a sequencing batch reactor (SBR). The tests were conducted in two stages, wherein the first stage involved determining the most favorable sonication conditions, that is, time and amplitude. The authors used the following amplitudes: 31 µm; 61.5 µm; 92 µm; 123 µm and times: 120 s; 240 s; 480 s; 960 s. The second stage focused on treating coke wastewater in SBRs (Reactor A—a proportion of coke wastewater in the mixture: 5%, 10%, and 20%; reactor B—sonicated coke wastewater, proportion in mixture: 5%, 10%, 20%). The efficiency of the treatment process was determined based on the rate of removal of selected parameters: chemical oxygen demand (COD), total organic carbon (TOC), inorganic carbon (IC), ammoniacal nitrogen (N-NH4), total nitrogen (TN), the course of pH changes. The study revealed that sonication of coke wastewater increased biodegradability and reduced its toxicity. The use of the preliminary sonication of coke wastewater before biological treatment improved the degree of removal of the tested parameters by approximately 10%. The volumetric ratio of coke wastewater in the mixture had the greatest impact on the obtained results. The use of an ultrasound field allows the treatment process to be executed with a coke wastewater addition exceeding 10%. In addition, it was found that in order to increase the coke wastewater treatment efficiency, one should optimize individual phases in the SBR and the pollution load.

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Enhancing the removal of pollutants from coke wastewater by bioaugmentation: A scoping study

Cited by 11 publications

References 47 publications

Nitrogen removal from coke making wastewater through a pre-denitrification activated sludge process

Nitrogen removal from coke making wastewater through a pre-denitrification activated sludge process

Biological treatment of coke plant effluents: from a microbiological perspective

The Impact of an Ultrasonic Field on the Efficiency of Coke Wastewater Treatment in a Sequencing Batch Reactor

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