WEC Projects Designs, Manufactures, assembles, delivers, installs and commissions potable and clear water treatment plants for domestic or industrial use. These plants can be supplied as containerised, skid mounted or modular units.
The plants are designed according to the Clients needs and for a large range of flow’s. They are typically from as small as 100m3/day (4 m3/hr) up to 5 ML/day (200 m3/hr).
River, dam or borehole water is treated to international standards using conventional treatment and filtration processes. The design of the treatment plants offer flexible capability and capacity to deal with varying raw water quality.
The plants and their components are designed to be containerised and/or ‘modular’ in design. This ensures superior quality in the manufacture and assembly at our workshops, ease of transport and quick, simple installation. The plant is also secure and can be installed on a concrete base or prepared lay-down area.
Where possible the plants and components are designed to fit in or be of equivalent size to standard shipping containers, making them easy to transport and handle. The plants can be transported to remote areas or re-located as and when required.
The package water treatment plants are designed to operate 365 days per year with an availability of 100%. The plants can be fully automated with PLC and touch-screen HMI or manually operated plant by means of daily operator input.
Process Description & Design
The conventional plant incorporates flocculent dosing, in-line mixing, clarification, sand filtration and disinfection (chlorination) treatment processes.
The dosing pumps are typically positive displacement type with mechanical diaphragm and chemical make-up is batch prepared where dry chemicals shall be prepared in tanks with a minimum 24hr cycle. The tanks are equipped with mixers, make-up and injection connections. A flocculation chamber with over-and-under baffles providing specific retention times and velocities. The flocculation chamber is incorporated upfront of the WEC Projects proprietary lamella settlers and forms part of the same structure.
Settling is done by parallel plate (lamella) settler which is a WEC Projects proprietary design. These settlers are modular and offer a small surface areas and footprints to aid in the reduction in size of the overall plant. The lamella packing is typically of plastic inclined tube design. The filters are fed by centrifugal filter feed pumps (suction from the buffer tanks and discharge to the filters).
Reinforced fibre pressure sand filters are supplied and are typically housed in the filter container. The filter backwashing sequence is controlled.
A flow meters are supplied at the inlet and outlet of the plant. Pressure gauges are supplied at the pumps, on the inlet line and on the backwash line.
A flow switch is provided in the inlet line to operate the start/stop of the dosing equipment.
A pressure switch is provided in the filter supply line (after the filter pumps) as an alternate control to the start of the backwash sequence. Pipe work is typically uPVC, Class 9 pipe, giving a velocity of <2m/s. The fittings shall be glued on site.
A wall mounted electrical panel is supplied with low voltage, contactors, control voltage and earth leakage.
WEC Projects is also a supplier of reverse Osmosis Plants and equipment. Reverse osmosis Equipment is often supplied together with complete plants in applications where very high quality water is required.
We include operation & maintenance manuals and operator training with commissioning of the plants.
A standard 12 month warrantee of the plant(s) and all equipment is applicable from date of commissioning of the plant.
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