Synergistic antimicrobial combinations using hydrogen peroxide with complementary agents

Overview

This research investigates synergistic antimicrobial strategies that combine hydrogen peroxide with complementary agents to achieve stronger microbial inactivation at lower doses of each component. Hydrogen peroxide is a reactive oxygen species that degrades into safe byproducts (water and oxygen), making it attractive for sustainable antimicrobial applications. The work focuses on identifying agent combinations that produce hydroxyl radicals and other reactive intermediates, amplifying killing efficiency beyond what any single agent can deliver alone.

The value proposition centers on reducing overall chemical loading, lowering costs, and improving safety profiles in applications such as harmful algal bloom mitigation, water treatment, and disinfection. By validating combinations that work at sub-threshold concentrations, the research supports more sustainable antimicrobial protocols across environmental and industrial settings.

Technical specifications

Core mechanism:

• Hydrogen peroxide acts as a precursor for hydroxyl radical formation, a highly reactive oxidant responsible for microbial inactivation
• Combination with agents such as L-lysine, silver nanoparticles, ammonium salts, or ascorbic acid enhances radical generation and cell membrane disruption
• Lower concentrations of each agent achieve equivalent or superior bactericidal effects compared to single-agent treatments

Validated findings:

• Growth experiments with cyanobacteria demonstrated synergistic effects between H2O2 and L-lysine, with the combination outperforming either agent alone
• Reduced dosing of both agents maintained or improved killing efficacy against toxin-producing cyanobacteria

Future validation approach:

• Screening of at least two additional candidate agents (silver nanoparticles, ammonium salts, ascorbic acids) for synergistic potential
• Literature-guided identification of further candidate combinations
• Evaluation against industry must-have and preferred requirements for target applications

Technology readiness level

The research is currently at an early-to-mid stage of laboratory validation. Proof-of-concept data has been generated in cyanobacterial systems, demonstrating measurable synergy between hydrogen peroxide and L-lysine. Next steps include expanding the agent screening panel, formalizing dose-response characterization, and aligning validation protocols with industry-defined requirements. The work is positioned to advance toward applied testing in water treatment and harmful algal bloom mitigation contexts, with potential for pilot-scale evaluation once candidate combinations are prioritized.