CLARIFIER SYSTEMS
This package clarifier unit from Colloide Engineering Systems offers an extremely effective solution for a variety of applications in a stand alone packaged format which minimizes lead times and cost while maximizing efficiency and process performance.
This treatment unit can be used in a range of applications as either a stand alone unit or as a component of a complete plant. Applications include:
- Potable water treatment
- Solids precipitation
- Tertiary treatment
- Solids recovery and removal
A wide range of standard sizes can be catered for with a single unit capable of going up to 250 cubic metres per hour.
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Main Process Stages
1. CHEMICAL DOSING
Chemicals are generally added to precipitate particles from the flow. Typically, these chemicals are used for pH control, flocculation and coagulation. These chemicals are dosed at strategic points in the process prior to settlement and are mixed thoroughly using the system provided.
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 2. MIXING - THREE STAGE
The chemicals are dosed at certain locations in the mixing phase. The mixing tanks offer an excellent dosing system whereby the optimum contact times and mixing regimes are achieved. The first mixing tank is a high speed flash mixer providing an aggressive mixing. The second and third are slow speed paddle mixers to build the floc. as much as possible.
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 3. SETTLEMENT
Lamella tubes/plates are used to settle the coagulated particles into the collection hoppers at the bottom of this settlement tank. This design ensures maximum efficiency in terms of upward flow velocities. The clarified water weirs over into the troughs at the top of this tank for immediate use or for further treatment.
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 4. DESLUDGING
The solids settle into collection hoppers positioned below the lamella tubes/plates. The number of collection hoppers will depend on the capacity of the plant and the material being processed. The sludge is discharged from these hoppers periodically via actuated valves, the duration and frequency of which is fully adjustable.
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General - Package clarifier system
This unit can be designed in a wide range of sizes and configurations, to suit the Clients needs. The clarifier requires only a level base and can therefore be quickly and economically installed into any plant.
The clarifier can be used as a stand alone system, taking the full plant flow, with or without additional equipment such as sand filters, screens, etc.
It can also be used effectively to provide additional capacity to an existing plant. In this type of application the clarifier would take a percentage of the flow with the existing plant taking the balance.
Typical applications include:
- Potable water treatment, for both solids and colour removal
- Solids precipitation and removal from industrial wastewater
- Tertiary treatment of wastewater
- Recovery of solids from process streams within food and drinks industry
- Removal of fibrous materials from industrial process/waste streams
Various configurations are available. A standard plant would have the dosing points, mixing system and settlement areas. Variations include; having the mixing and settlement sections separate; pumping directly from the outflow of the clarifier; clarifier access walkways built into existing walkways; variations on the chemical dosing systems and points of dosing; operating more than one unit in parallel to achieve large through flows with one (or more) mixing system(s).
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System Main Features
Retained design means quality
Standard designs are used for every plant. This means that the designs are proven, there is no need for costly engineering time on every plant and the plant can be delivered to site in a much shorter time than conventional units.
No civil requirements
The clarifier is self supporting and can be positioned on a flat surface, without the need for walls, access platforms, tanks, etc. This reduces cost and, again, time.
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 Lead time
Due to the standard nature of these plants, lack of civils and other site work, the lead time is minimized. A typical unit can be delivered to site in 10 weeks, having been fully factory tested and commissioned.
Transportation
The system is designed with both transportation and the minimization of site work in mind. Therefore, the unit’s cross sectional area will always be suitable for road transport and can be delivered in one or two sections (dependent on capacity of unit).
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 Installation & commissioning
The actual installation period on site is taken up by offloading and bolting together of the parts. This takes a maximum of one day for each unit - no longer. Once the pipework is connected, the plant is ready for commissioning.
In built flexibility
The system is as flexible as possible from a process point of view. Chemicals can be dosed at several locations, mixer speeds can be varied, both the de-sludging frequency and duration are adjustable, etc.
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