Decoupling a novel Trichormus variabilis-Synechocystis sp. interaction to boost phycoremediation

Area of Science:

• Environmental Microbiology
• Biotechnology
• Phycology

Background:

• Conserving freshwater resources necessitates wastewater recycling.
• Algal systems (phycoremediation) offer efficient, low-cost wastewater treatment.
• Industrial wastewater often contains inhibitory compounds, limiting algal applications.

Purpose of the Study:

• Isolate and characterize extremophyte algae for phycoremediation of industrial wastewater.
• Investigate the adaptive mechanisms of Synechocystis sp. in response to wastewater stress.
• Evaluate the efficiency of a stress-acclimated Synechocystis sp. monoculture for nutrient removal and biomass generation.

Main Methods:

• Isolation of extremophyte algal strains.
• Co-culture experiments with Synechocystis sp. and Trichormus variabilis.
• Gradual acclimation of the algal culture to increasing industrial wastewater concentrations.
• Monitoring of nutrient removal (ammonium, phosphate) and biomass production.

Main Results:

• A novel Synechocystis sp. strain demonstrated adaptability to wastewater.
• Wastewater acclimation led to a stress-tolerant Synechocystis sp. monoculture.
• High removal efficiencies achieved: 99.4% ammonium and 97.5% phosphate.
• Rapid biomass generation potential identified for industrial applications.

Conclusions:

• The isolated Synechocystis sp. strain is a promising candidate for phycoremediation.
• Adaptive acclimation is crucial for utilizing algae in challenging wastewater environments.
• The generated algal biomass can serve as a sustainable feedstock for bio-products.