Textile　wastewater　is　characterized　by　high　salinity　and　high　temperature,　and　azo　dye　decolorization　by　mixed　cultures　under　extreme　salinity　and　thermophilic　environments　has　received　little　attention.　High　salinity　and　temperature　inhibit　the　biodecolorization　efficiency　in　textile　wastewater.　In　the　present　study,　a　halo-thermophilic　bacterial　consortium　(HT1)　that　can　decolorize　azo　dye　at　10%　salinity　and　50　degrees　C　was　enriched.　Bacillus　was　the　dominant　genus,　and　this　genus　may　play　a　key　role　in　the　decolorization　process.　HT1　can　decolorize　metanil　yellow　G　(MYG)　at　a　wide　range　of　pH　values　(6-8),　temperatures　(40-60　degrees　C),　dye　concentrations　(100-200　mg/L)　and　salinities　(1-15%).　Laccase,　manganese　peroxidase,　lignin　peroxidase　and　azoreductase　are　involved　in　the　decolorization　process　of　MYG.　In　addition,　the　decolorization　pathway　of　MYG　was　proposed　based　on　GC-MS　and　FTIR　results.　The　toxicity　of　MYG　decreased　after　decolorization　by　HT1.　A　metagenomic　sequencing　approach　was　applied　to　identify　the　functional　genes　involved　in　degradation.　Overall,　this　halo-thermophilic　bacterial　consortium　could　be　a　promising　candidate　for　the　treatment　of　textile　wastewater　under　elevated　temperature　and　salinity　conditions.　(C)　2021　Published　by　Elsevier　Ltd.