Water Treatment Chemicals

Water-treatment chemicals help control scaling, corrosion, fouling, suspended solids, microorganisms, pH and other water-quality conditions that can affect treatment performance and equipment reliability.

Hydroxy supplies treatment chemicals for applications ranging from RO membrane protection and raw-water clarification to boiler, cooling-water and wastewater treatment.

Chemical selection is based on the water analysis, treatment process, target contaminant, equipment materials and operating conditions, helping ensure that the chemistry supports rather than interferes with the overall treatment system.

Treatment Chemicals

Water chemistry can significantly influence treatment performance and equipment life. Appropriately selected treatment chemicals can support:

Scale Control
Corrosion Protection
Membrane Fouling Control
Suspended-Solids Removal
Coagulation & Flocculation
pH Adjustment
Microbiological Control
Chlorine Control
Membrane Cleaning
Boiler-Water Conditioning
Cooling-Water Treatment
Wastewater Clarification
Sludge Dewatering
Foam Control

The correct chemical programme should address the actual water chemistry and treatment objective, rather than applying the same product to every installation.

Key Selection Parameters

Water-treatment chemicals should be selected according to the process and water characteristics. Typical selection parameters include:

Water Analysis
Treatment Application
Target Contaminant / Problem
Chemical Function
Active Ingredient / Chemistry
Product Concentration
pH Range
Operating Temperature
Water Flow Rate
System Recovery, where applicable
Hardness & Alkalinity
Silica
Iron & Metals
Organic Loading
Microbiological Conditions
Membrane Compatibility
Equipment Material Compatibility
Required Product Grade
Packaging Requirement
Storage & Handling Requirements
Safety Data Sheet — SDS

Chemical Selection Matters

A chemical that performs effectively in one application may be unsuitable for another. For example, RO chemistry must be membrane-compatible, while boiler and cooling-water programmes must consider operating temperature, concentration cycles, metallurgy and corrosion conditions.

Products

RO Antiscalants & Dispersants

Protect membrane systems against mineral scaling and deposit formation.

RO antiscalants are dosed into membrane feed water to help control precipitation of scale-forming salts and maintain membrane performance. The appropriate formulation is selected according to feed-water chemistry, recovery and scaling potential.

Typical Applications:

Brackish-water RO, seawater RO, industrial RO, high-recovery RO, wastewater-reuse RO and process-water systems.

RO Membrane Cleaning Chemicals

Specialised cleaners for restoring membrane performance.

Membrane cleaners are formulated to remove specific deposits and foulants accumulated during RO operation. Depending on the fouling condition, appropriate acidic, alkaline or speciality cleaning formulations may be selected.

Typical Applications:

Mineral scaling, organic fouling, biological deposits, metal deposits and general RO membrane cleaning.

Coagulants

Chemical conditioning for improved suspended-solids separation.

Coagulants destabilise fine suspended and colloidal particles so they can combine into larger, more easily separable particles. Both inorganic and organic coagulant chemistries may be selected according to water characteristics.

Typical Applications:

Raw-water clarification, surface-water treatment, industrial wastewater, colour removal, turbidity reduction and solids separation.

Flocculants & Polymers

Improve floc formation, settling and solids separation.

Flocculants are high-molecular-weight polymers that help small destabilised particles form larger flocs, improving clarification and dewatering. Products can be selected according to ionic charge, molecular structure and wastewater characteristics.

Typical Applications:

Clarifiers, DAF systems, raw-water treatment, industrial wastewater, sludge thickening and sludge dewatering.

pH Adjustment Chemicals

Controlled chemistry for maintaining the required treatment pH.

pH correction chemicals are used to raise or lower water pH so downstream treatment processes can operate within the required range. Correct pH control can influence coagulation, disinfection, scaling, corrosion and biological treatment performance.

Typical Applications:

Raw-water treatment, RO pretreatment, neutralisation, ETP, STP, process water and industrial wastewater.

Disinfection & Oxidation Chemicals

Chemical treatment for microbiological control and oxidation.

Disinfection chemicals are used to control susceptible microorganisms and maintain hygienic water conditions where chemical disinfection is required. Appropriate oxidising chemistry may also assist selected oxidation processes.

Typical Applications:

Drinking water, treated-water storage, process water, cooling water, wastewater reuse and distribution systems.

Boiler Water Treatment Chemicals

Control scale, corrosion and deposits throughout boiler and steam systems.

Boiler-water chemistry helps protect heat-transfer surfaces, feed-water systems and condensate circuits from conditions that can reduce efficiency or damage equipment. Product programmes may include: Scale & Deposit Control · Oxygen Scavenging · Corrosion Control · Alkalinity / pH Conditioning · Condensate Treatment

Typical Applications:

Industrial boilers, steam generators, process boilers and boiler-feed-water systems.

Cooling Water Treatment Chemicals

Protect cooling systems against scale, corrosion and biological fouling.

Cooling-water chemistry is used to maintain heat-transfer performance and protect recirculating water systems. Treatment can include: Scale Inhibitors · Corrosion Inhibitors · Dispersants · Biocides · Biodispersants

Typical Applications:

Cooling towers, open recirculating systems, closed-loop cooling systems and industrial cooling-water networks.

Biocides & Microbiological Control Chemicals

Control biological growth in water-treatment and utility systems.

Biocides are selected to control bacteria, algae, fungi and other microorganisms that can contribute to slime, biofilm, fouling or deterioration of water quality. Oxidising or non-oxidising products may be selected according to application.

Typical Applications:

Cooling towers, process water, industrial water systems, membrane pretreatment and selected wastewater applications.

Wastewater Treatment Chemicals

Chemical conditioning for improved wastewater treatment and solids separation.

Wastewater-treatment chemicals can support physical, chemical and biological treatment processes where contaminant characteristics require additional conditioning. Products may be selected for: Coagulation · Flocculation · Emulsion Breaking · Precipitation · Odour Control · Solids Separation

Typical Applications:

ETP, industrial wastewater, oily wastewater, process effluent and tertiary treatment.

Sludge Dewatering Chemicals

Improve water release and reduce sludge-handling volume.

Dewatering polymers help condition sludge before mechanical dewatering by improving solids aggregation and water separation. The appropriate polymer is selected according to sludge type, solids concentration and dewatering equipment.

Typical Applications:

Filter presses, centrifuges, belt presses, wastewater sludge and biological sludge.

Defoamers & Antifoams

Control unwanted foam within water and wastewater processes.

Defoamers and antifoams reduce or prevent excessive foam that can interfere with plant operation, tank capacity and solids separation.

Typical Applications:

ETP, biological treatment, industrial wastewater, process-water systems and sludge treatment.