Characterisation of thiocyanate degradation in a mixed culture activated sludge process treating coke wastewater
作者： Eleanor Raper , Tom Stephenson , Raymond Fisher , David R. Anderson , Ana Soares
DOI: 10.1016/J.BIORTECH.2019.121524
关键词:
摘要: Abstract Microbial degradation of thiocyanate (SCN−) has been reported to suffer from instability highlighting the need for improved understanding underlying mechanisms and boundaries. Respirometry, batch tests DNA sequencing analysis were used improve a mixed culture treating coke wastewater rich in SCN−. An uncultured species Thiobacillus was most abundant (26%) displayed similar metabolic capabilities denitrificans thioparus. Thiocyanate hydrolysed/oxidised NH4+-N, HCO3− SO42−. Nevertheless, at 360–2100 mg SCN−/L breakdown pathway observed. Respirometry demonstrated that NH4+-N inhibitory SCN− (IC50: 316 mg/L). Likewise, phenol (180 mg/L) hydroxylamine (0.25–16 mg/L) reduced by 41% ca. 7%, respectively. The pathways can enable stable treatment efficiencies compliance with effluent
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