Production of indigo by recombinant bacteria

Area of Science:

• Biotechnology
• Industrial Microbiology
• Chemical Engineering

Background:

• Indigo dye is crucial for the textile industry, particularly denim.
• Current chemical production relies on non-renewable petrochemicals and generates toxic byproducts.
• Microbial fermentation presents a sustainable and environmentally friendly alternative for indigo biosynthesis.

Purpose of the Study:

• To evaluate the feasibility of industrial-scale indigo biosynthesis.
• To address research gaps hindering the translation of biochemical indigo production.
• To assess the business potential of recombinant indigo biosynthesis.

Main Methods:

• Identification of five classes of potential biocatalysts for indigo synthesis.
• Design of two bioprocess flowsheet options for dye production (pre-reduced solution or dry powder).
• Estimation of platform and process values based on available technological data and bioprocess facilities.

Main Results:

• Projected a realistic annual output of 540 tonnes for a potential indigo biosynthesis platform.
• Determined this output is sufficient for a single industrial-size denim dyeing plant.
• Sensitivity analysis indicated reaction titer as the most critical factor influencing output.

Conclusions:

• Recombinant indigo biosynthesis is a viable and attractive option for industrial application.
• The technology requires further optimization for real-life implementation.
• Biological indigo production shows potential for both luxury and mass-market segments.