Acid Red 337

Biodegradation Strategy of Acid Red 337 Dye

Ewida, Ayman YI, et al. Water Science, 2019, 33(1), 154-161.

Acid Red 337 (AR 337) is a single azo dye and is widely used in the textile industry. It is a dangerous recalcitrant agent when released into aqueous environments. Biodegradation has proven to be one of the cost-effective technologies for the removal of complex organic matter, such as textile dyes, from wastewater. Bacillus megaterium KY848339.1 was shown to have good decolorizing ability for AR 337 dye. Under appropriate conditions, the bacteria can remove 91% of dye concentration of 500 mg/L within 24 hours, and the removal rate reaches 98.9% within 10 days.
Biodegradation pathways of acid red 337
· B. megaterium can completely degrade AR337 dye and convert it into small, simple aliphatic compounds.
· The azo bond is broken, forming two intermediate degradation products, namely 2-Trifluro methyl 5-{(aminoxy) phenyl) and 7, 8-diamino-3-{(aminoxy) sodium sulfonyl) naphthalene}-1-ol.
· These intermediates are further degraded into methyl propionate, methyl formate and acetic acid. All intermediate by-products are then ultimately converted into carbon dioxide.