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

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dc.contributor.authorRaper, Eleanor
dc.contributor.authorStephenson, Tom
dc.contributor.authorSimões, Francisco
dc.contributor.authorFisher, Raymond
dc.contributor.authorAnderson, David R.
dc.contributor.authorSoares, Ana
dc.date.accessioned2018-02-13T10:08:38Z
dc.date.available2018-02-13T10:08:38Z
dc.date.issued2018-02-09
dc.description.abstractBACKGROUND Bioaugmentation and biostimulation were investigated for their ability to improve the removal of thiocyanate (SCN-), polycyclic aromatic hydrocarbons (PAHs), phenol and trace metals in coke wastewater. Additionally, the ability of the microorganisms supplemented with the bioaugmentation product to survive in a simulated river water discharge was evaluated. RESULTS A commercially available bioaugmentation product composed mainly of Bacillus sp. was mixed with activated sludge biomass. A dose of 0.5 g/L increased the removal of Ʃ6PAHs (sum of fluoranthene, benzo[b]fluoranthene, benzo[k]fluoranthene, benzo[a]pyrene, indeno[1,2,3-cd]pyrene and benzo[g,h,i]perylene) by 51% and reduced SCN- below 4 mg/L enabling compliance with the EU Industrial Emissions Directive (IED). Biostimulation (supplementing micronutrients and alkalinity) allowed compliance for both SCN- and phenol (<0.5 mg/L). Bacillus sp. accounted for 4.4% of the microbial population after 25 hours (1.5 g/L dose) which declined to 0.06% after exposure to river water (24 hours). Exposure of the activated sludge biomass to river water resulted in a 98.6% decline in viable cell counts. CONCLUSION To comply with the IED, bioaugmentation and biostimulation are recommended for the treatment of coke wastewater to enable an effluent Ʃ6PAHs of 6.6 μg/L, 0.3 mg/L phenol and 1.2 mg/L SCN-. Such techniques are not anticipated to impact on downstream river water quality.en_UK
dc.identifier.citationEleanor Raper, Tom Stephenson, Francisco Simões et al. Enhancing the removal of pollutants from coke wastewater by bioaugmentation: a scoping study. Journal of Chemical Technology and Biotechnology, Volume 93, Issue 9, September 2018, pp. 2535-2543en_UK
dc.identifier.issn0268-2575
dc.identifier.urihttp://dx.doi.org/10.1002/jctb.5607
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/12986
dc.language.isoenen_UK
dc.rightsAttribution-NonCommercial 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/*
dc.subjectBioaugmentationen_UK
dc.subjectBiostimulationen_UK
dc.subjectThiocyanateen_UK
dc.subjectPhenolen_UK
dc.subjectTrace metalsen_UK
dc.subjectPolycyclic aromatic hydrocarbonsen_UK
dc.titleEnhancing the removal of pollutants from coke wastewater by bioaugmentation: a scoping studyen_UK
dc.typeArticleen_UK

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