The challenge – Biofilms as the starting point of microbial growth

Approximately 5 % of water-borne microorganisms are present in planktonic or free-floating form. However, the major proportion of microorganisms lives stationary on surfaces. Under normal environmental conditions they start to form biofilms. They remain metabolically active in these deposits and are protected from physical and chemical hazards.

Deposits of biofilm are especially common in industrial, technical, medical-technical, and commercial water transport systems, such as cooling water systems in cooling towers or in water transport elements in medical-technical plants as well as drinking water systems. In order to resolve these problems, many antimicrobial substances and systems have been developed for disinfecting water. Furthermore, procedures have been developed for the elimination or control of microbial growth.
Many of the available substances with antimicrobial effects are produced synthetically to ensure their chemical purity, are expensive to manufacture, not biodegradable, and ecologically questionable. Depending on their application, these substances could be unsafe. For plausible reasons the substances are met with rejection. Thus, there is an increasing need for natural, ecologically acceptable, and economical substances. Quite frequently, such natural substances are rather poorly soluble in water and may have an obnoxious smell or taste. In technically permissible concentrations these substances may penetrate the existing biofilms inadequately or not penetrate them at all.

Peroxide, especially hydrogen peroxide (H₂O₂), hypochlorite and hypochlorous acids have been traditionally used for many years for the treatment of water in technical plants. However, these compounds are highly volatile. Biofilms cannot be degraded efficiently with these compounds alone.

HYDRO L.O.G. - Very simple and highly effective

The Solution - Natural enhancement of the active substance, biodegradable

L.O.G. TECHNOLOGY® is a composition with enhanced efficacy for antimicrobial and antioxidative treatment of aqueous liquids and biofilms in water. The exclusive use of naturally biodegradable substances makes L.O.G. TECHNOLOGY® a leader in terms of sustainability.

The outstanding feature of L.O.G. TECHNOLOGY® is its composition; it consists of a micelle-forming solute of plant extracts, an emulsifier, water, and a biodegradable antimicrobial active substance from the group of peroxycarbonic acid, hypochlorites and hypochlorous acids. The combination of such micelle-forming solutes with an antimicrobial active substance achieves a highly enhanced effect on microorganisms; the effect is significantly greater than the anticipated additive antimicrobial effect of the individual components because the micelle-forming solutes facilitate the penetration of the active substance into the biofilm. Results obtained after the application of L.O.G. TECHNOLOGY® in water transport systems have shown that HYDRO L.O.G.® has a markedly better inhibitory effect on L. pneumophila than other non-micelle-forming antimicrobial substances. Furthermore, the results obtained in the laboratory were confirmed by practical applications in the most diverse water transport systems.

Results of the enhanced effect of the active substance - on biofilm

The aim of a study performed at the University Clinic of Hospital Hygiene and Infection Control at the Medical University of Vienna was to investigate the antibacterial efficacy of H2O2 alone compared to H2O2 using the L.O.G. TECHNOLOGY® on bacteria in a model of mature biofilm.
The effect of test solutions of 1.7 % H2O2 reformulated with L.O.G. TECHNOLOGY® was compared with that of a 1.7% H2O2 solution with no micelle-forming solute and water as controls, given an exposure time of 5 minutes. The effects on S. aureus, S. epidermidis and P. aeruginosa were studied
Results are shown in the figure below.

Antimicrobial effect

The results clearly show that water alone has no antimicrobial effect on the test bacteria in biofilm. 1.7% H₂O₂ has a mild antimicrobial effect of about one power of ten, which is hardly different from that of water. In contrast, owing to the enhancement of the active substance, H₂O₂ reformulated with L.O.G. TECHNOLOGY® was able to kill the bacteria of all test strains on biofilms within 5 minutes (reduction of 8 log10 units).



  • HYDRO L.O.G.® - a finished product based on H₂O₂
  • Amplified effect and biodegradable components (ecological advantages)
  • Greatest antimicrobial efficacy in biofilms (reduction of 8 log10 units)
  • Low concentrations of the active substance because of its enhancement (protection of material)
  • Short exposure times (economical)
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