Aeromonas hydrophila strain:LZ-MG14 Genome sequencing and assembly. Aeromonas hydrophila strain:LZ-MG14

Textile industry wastewater comprises refractory components, such as highly toxic dyes and hexavalent chromium (Cr(VI)). Aeromonas hydrophila LZ-MG14 was isolated and characterized to develop an effective bioaugmentation strategy for the bioremediation of malachite green (MG) and Cr(VI) from textile wastewater. Strain LZ-MG14 removed 96.8% of MG (200 mg L-1) and 93.71% of Cr(VI) (0.5 mmol L-1) within 12 h with a significant increase in biomass. The mechanism underlying MG mineralization by LZ-MG14 involved N-demethylation and decomposition of conjugated structure, while that underlying Cr(VI) removal was reduction. LZ-MG14 bioaugmentation in a membrane bioreactor (MBR) significantly enhanced the efficiency of MG degradation and Cr(VI) removal in textile wastewater. Additionally, LZ-MG14 successfully colonized the activated sludge and shaped the effective microbiota for MG degradation and Cr(VI) removal. LZ-MG14 bioaugmentation can be potentially used for MG degradation and Cr(VI) removal in the textile wastewater.