Biocides

Biocides

In industrial water treatment, biocides—sometimes referred to as antimicrobial agents or microbicides—are essential for controlling biological activity within process systems. These chemicals are specifically formulated to suppress the growth of bacteria, algae, fungi, and other microorganisms that, if left unmanaged, can severely compromise system performance and integrity.

Uncontrolled microbial activity can result in several operational challenges.

  • Biofouling occurs when microorganisms form biofilms on heat exchangers, pipelines, and equipment surfaces, restricting water flow and diminishing heat transfer efficiency.
  • Microbially Induced Corrosion (MIC) presents another major concern, as certain bacteria accelerate localized corrosion, leading to premature equipment failure and high maintenance costs.
  • Increased Pathogens , excessive microbial growth can elevate the risk of waterborne pathogens, creating potential health hazards for personnel and surrounding environments.

Hydroguards’s comprehensive biocide range offers a variety of options, including:

  • Oxidizing and non-oxidizing biocides
  • Broad-spectrum micro-biocides
  • Antifoulants
  • Bio Dispersants
  • Penetrants
  • Chlorine dioxide

Product Name-

Composition

Comments

Product Details

Bio Guard 35

Chlorine dioxide based biocide

Powerful oxidizing biocide for microbial and Legionella control in cooling systems

Bio Guard 11

Sodium hypochlorite based biocide

General-purpose oxidizing biocide for cooling water and process systems

Bio Guard 39

Bromine-chlorine blended biocide

High-efficiency oxidizer for high-temperature and alkaline cooling system

Bio Guard 41

Glutaraldehyde based biocide

Non-oxidizing bactericide and slime remover for cooling and wastewater systems

Bio Guard 19

DBNPA based fast acting biocide

Quick kill non-oxidizing biocide for cooling towers and RO pre-treatment systems

Bio Guard 45

THPS based biocide

Environmentally friendly non-oxidizing biocide for oilfield and industrial applications

Bio Guard 47

Isothiazolinone + glutaraldehyde blend

Dual-action non-oxidizing biocide for severe biofouling conditions

Bio Guard 49

Quaternary ammonium compound (QAC) blend

Non-oxidizing algaecide and slime control for cooling towers

Bio Guard 31

Biodispersant with polymeric surfactant

Slime control and deposit removal in open and closed recirculating systems

Bio Guard 36

Organic biodispersant and surfactant blend

Biofilm remover and scale control agent for cooling and heat exchanger systems

Bio Guard 31

Biodispersant based on non-ionic surfactants

Biodispersent

Bio Guard 33

Hydrocarbon dispersants for cooling systems

Biodispersent

Product Name-

Composition

Comments

Product Details

Bio Guard 35

Chlorine dioxide based biocide

Powerful oxidizing biocide for microbial and Legionella control in cooling systems

Bio Guard 11

Sodium hypochlorite based biocide

General-purpose oxidizing biocide for cooling water and process systems

Bio Guard 39

Bromine-chlorine blended biocide

High-efficiency oxidizer for high-temperature and alkaline cooling system

Bio Guard 41

Glutaraldehyde based biocide

Non-oxidizing bactericide and slime remover for cooling and wastewater systems

Bio Guard 19

DBNPA based fast acting biocide

Quick kill non-oxidizing biocide for cooling towers and RO pre-treatment systems

Bio Guard 45

THPS based biocide

Environmentally friendly non-oxidizing biocide for oilfield and industrial applications

Bio Guard 47

Isothiazolinone + glutaraldehyde blend

Dual-action non-oxidizing biocide for severe biofouling conditions

Bio Guard 49

Quaternary ammonium compound (QAC) blend

Non-oxidizing algaecide and slime control for cooling towers

Bio Guard 31

Biodispersant with polymeric surfactant

Slime control and deposit removal in open and closed recirculating systems

Bio Guard 36

Organic biodispersant and surfactant blend

Biofilm remover and scale control agent for cooling and heat exchanger systems

Bio Guard 31

Biodispersant based on non-ionic surfactants

Biodispersent

Bio Guard 33

Hydrocarbon dispersants for cooling systems

Biodispersent

FAQ

How does microbiological fouling affect system performance, and how is it treated?

Microbial growth can form biofilms that decrease heat transfer efficiency, increase corrosion risk, and harbor harmful bacteria like Legionella. HydroGuard addresses this by using oxidizing and non-oxidizing biocides, combined with continuous monitoring and periodic shock dosing to control bacterial populations.

How can microbiological growth in wastewater systems be managed?

Excessive microbial activity can cause slime deposits, odors, and operational inefficiencies. HydroGuard uses targeted biocides and continuous monitoring to control microbial populations without disrupting beneficial bacteria in biological treatment units.

How does fouling occur in RO membranes, and how is it prevented?

Fouling results from particulates, biofilms, and organic matter building on membranes. HydroGuard implements antiscalants, periodic cleaning, and biocide dosing to prevent fouling, maintaining consistent water flow and salt rejection.

What causes microbiological fouling in chilled water systems, and how is it controlled?

Stagnant water, warm temperatures, and nutrient presence lead to biofilm formation. HydroGuard applies oxidizing and non-oxidizing biocides, combined with regular monitoring, to prevent fouling and ensure clean and efficient chiller operation.

How can microbiological growth in boilers be controlled?

Microbial contamination can form biofilms and contribute to corrosion under deposits. HydroGuard uses biocides and system monitoring to control microbial populations, complemented by proper water chemistry management to maintain safe operational conditions.

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