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Napier-Reid Ltd. 
10 Alden Road, Unit 2,
Markham, Ontario L3R2S1,
Tel: (905) 475 1545
Fax: (905) 475 2021
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Products and Systems

Napier-Reid Ltd. is a leading engineering designer, manufacturer and solution provider for the water and wastewater treatment industry. With over 50 years of experience, the successful completion of over 3000 projects worldwide, a core team of professionals and highly skilled staff, we continue to grow and reach new heights every year. With in-depth engineering knowledge of water and wastewater treatment processes, innovative products, high quality design, continuous improvement and effective research and development, we continue to be a leader in our field.

To get value added products and peace of mind, let Napier-Reid be your one stop solution provider for water and wastewater treatment.


Napier-Reid Ltd. (Napier-Reid) designs and manufactures a wide range of equipment for water treatment.

The proper combination of the following treatment processes and equipment has to be selected based on the source of water and the impurities that need to be removed:

Preliminary Treatment:  It is a physical, chemical or mechanical process that water undergoes before the main treatment process. It may involve mechanical equipment such as fine screen or bar screens to remove big solid particles, clay, debris, leaves and rocks. A presedimentation basin or tank settles and removes sand, grit and gravel from raw feed water. During the preliminary treatment process, chemicals are added to maintain the pH in case the following process is pH sensitive.

Aeration:  Napier-Reid’s aeration equipment includes fine and coarse bubble and diffused aeration systems. They remove taste and odour due to volatile gases such as hydrogen sulphide, algae and related organisms. The process oxidizes iron, manganese and increases the dissolved oxygen content in water. It also removes CO2, methane and other flammable gases.

Coagulation and Flocculation:  The coagulation/flocculation process greatly influences the quantity and quality of the flocs formed which in turn affects the whole water treatment process. Coagulants such as alum when mixed rapidly destabilize and neutralize the charge of colloidal particles present in the water.

In the flocculation process, the coagulated particles clump together in order to form flocs. The following process, either sedimentation or floatation governs the size and weight of flocs. Napier-Reid designs and manufactures a wide range of Static Mixers, Rapid Mixers, In-Line Dynamic Mixers and Flocculators for an optimum coagulation/flocculation process.

Clarification:  Napier-Reid designs and manufactures "Clarifier with tube settlers" and "Dissolved Air Floatation (DAF)" units. These systems have a high efficiency in a reduced footprint. In the Clarifier with tube settlers, the heavy flocs settle at the bottom of tank while clear water is collected from the top. In the DAF unit, the flocs are floated to the top where they are skimmed while clear water is collected from the end of the DAF tank.

Filtration:  Napier-Reid designs and manufactures a wide range of filtration systems according to the client's requirements. All of our systems are custom designed.

Our Conventional Gravity Filters and Pressure Filters have different layers (bed) of granular material such as: sand, gravel, activated carbon, greensand, garnet or other media. They remove the suspended materials when water flows through the bed. They also remove odour, taste, colour and turbidity.

Napier-Reid manufactures vertical and horizontal “Pressure Filters" with a relatively higher hydraulic loading rate and smaller footprint compared to conventional gravity filters.

Napier-Reid’s range of membrane filtration systems removes suspended matter, microorganisms (including Giardia and Cryptosporidium), algae, silt and iron/manganese precipitates from water sources. Based on the filtration requirement and size of the impurity that needs to be removed, a Reverse Osmosis (RO), Nano-filtration, Ultra-filtration or Micro-filtration system can be designed and supplied.

Ion Exchange:  Napier-Reid designs and manufactures Ion exchange systems. These systems are widely used for water softening, demineralization and water purification. All of our systems are designed according to the flow and contaminant that needs to be removed; they come completely automated with their own regeneration system.

Napier-Reid also supplies Chemical Dosing Systems, Disinfection Systems and Control Systems (PLC programming and hardware and/or SCADA packages) for an automaticoperation of the plant.


Napier-Reid designs and manufactures a wide range of equipment for wastewater treatment.

Primary Treatment:  It’s the first step in wastewater treatment that involves all headworks such as screening, grinding and settling by gravity. During this stage, screens remove impurities like sticks, gravels, rags and plastics and other large solids or debris in order to protect the pumps and other equipment of plant.

Napier-Reid manufactures and supplies a wide range of mechanical equipment including arc screens, bar screens, comminutors, screw grit classifiers and vortex grit removal systems.

Secondary Treatment:  The secondary wastewater treatment consists of biological treatment processes or physical-chemical process to remove organic matter and suspended solids from the wastewater.

In all biological wastewater treatment processes, microorganisms are used to absorb organic matter from the wastewater as their food. This process can be further divided in the following types:

  • Fixed Film System: In this type of systems, microorganisms grow on media such as HDPE. The wastewater is allowed to flow past the film of microorganisms that grow on the media; thus, organic matter and nutrients are absorbed from the wastewater. The microorganisms feed from this matter and the film thickens. When the quantity increases beyond a certain point, the film of microorganisms can be sheared off.

    Rotating biological contactors (RBC) and trickling filters are examples of fixed film biological systems.

    Napier-Reid has successfully installed over 300 fixed film systems worldwide.

  • Suspended Film System: In this system, the microorganisms are mixed and suspended in the wastewater. They absorb organic matter and nutrients from the wastewater and grow in size and quantity to form flocs. They are kept suspended in wastewater and all excess sludge is settled.

    Activated sludge, extended aeration and sequencing batch reactor (SBR) are examples of suspended film systems.

    In physical-chemical process, chemicals such as coagulants and flocculants are added to the wastewater in order to aid the formation of flocs. Formed flocs can then be settled as sludge using a clarifier or can be floated using dissolved air floatation (DAF).

    The treated water from the above mentioned process could be further treated using a filter to remove the remaining flocs or suspended solids.

    Napier-Reid is a leading designer and manufacturer of activated sludge systems, extended aeration plants, sequencing batch reactor (SBR), clarifiers, DAF and tertiary filters with over 500 installations worldwide.

Tertiary Treatment:  It is used to further improve the quality of the effluent. Conventional gravity filters, Pressure filters, GAC towers, and membrane filtration systems can all be used in this process.

Napier-Reid’s fabricated equipment has been installed worldwide and all of them are performing efficiently, meeting or exceeding all of our client's expectations.

Besides all of the above, Napier-Reid designs, manufactures and installs package wastewater treatment plant and sewage pumping stations.

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