Veolia Water and ASE to source potable water from the sea

WINDHOEK: Aqua Services and Engineering (ASE), a company of Veolia Water Solutions and Technologies secured a contract to upgrade and refurbish a 400 cubic meters per day seawater desalination plant in Walvis Bay.

The project will help increase potable water supply for domestic use, and provide enough process water to a Walvis Bay factory, according to ASE Managing Director Christian Stöck in a media statement issued and published on ASE website on Wednesday.

“Our engineers will introduce a vortex mixer to generate micro bubbles, which are fed into the flocculated raw seawater stream. This will help lighter organic particles float to the surface, and allow for heavier particles to settle,” he explained.

The plant should be operational within five to six months, and will provide much needed relief to Walvis Bay, where water scarcity has been a longstanding problem.

Stöck said the source seawater’s high organic content requires that ASE adapts an air flotation filtration system design, making it suitable for use as a pre-treatment step.

These settled particles will then be filtered by an ultrafine filtration bed where, unlike with an additional pumping step, minimal break-up of the flocculated particles will occur.

This pre-treatment will ensure that the raw seawater, often affected by red tide and sulphur eruptions, meets the required standards for effective desalination in reverse osmosis membranes, according to Stöck.

To help the plant optimise its energy consumption, ASE will install an energy recovery system to the reverse osmosis membrane system.

This high-end technology will help the plant reduce its reliance on municipal power sources by up to 42 per cent.

“Over the last 15 years, we have built up detailed knowledge of the Namibian coastal waters, and we have gained valuable experience from building and operating numerous seawater treatment plants. This will help ASE deliver the best possible solution to treat the often tricky Namibian seawater,” added Stöck.

Veolia Water, the water division of Veolia Environment, is the world leader in water and wastewater services. Specialized in outsourcing services for municipal authorities, as well as industrial and service companies, it is also one of the world’s major designers of technological solutions and constructor of facilities needed in water and wastewater services.

Leading water treatment company, Aqua Services and Engineering (ASE), has secured a contract to upgrade and refurbish a 400 cubic metres per day seawater desalination plant in Walvis Bay.

The project will help increase potable water supply for domestic use, and provide enough process water to a Walvis Bay factory.

The plant should be operational within five to six months, and will provide much-needed relief to Walvis Bay, where water scarcity has been a longstanding problem.

ASE Managing Director Christian Stöck explained in a media statement published on the Veolia Water Solutions and Technologies website on Wednesday that their engineers will introduce a vortex mixer to generate micro bubbles, which are fed into the flocculated raw seawater stream.

This process will help lighter organic particles float to the surface, and allow for heavier particles to settle.

Stöck said the source seawater’s high organic content requires that ASE, a Namibian-owned company, adapts an air flotation filtration system design, making it suitable for use as a pre-treatment step.

These settled particles will then be filtered by an ultrafine filtration bed where, unlike with an additional pumping step, minimal break-up of the flocculated particles will occur.

“This pre-treatment will ensure that the raw seawater, often affected by red tide and sulphur eruptions, meets the required standards for effective desalination in reverse osmosis membranes,” according to Stöck.

To help the plant optimise its energy consumption, ASE will install an energy recovery system to the reverse osmosis membrane system.

This high-end technology will help the plant reduce its reliance on municipal power sources by up to 42 per cent.

“Over the last 15 years, we have built up detailed knowledge of the Namibian coastal waters, and we have gained valuable experience from building and operating numerous seawater treatment plants.

This will help ASE deliver the best possible solution to treat the often tricky Namibian seawater,” he added.

Veolia Water, the water division of Veolia Environment, is the world leader in water and wastewater services.

Specialising in outsourcing services for municipal authorities, as well as industrial and service companies, it is also one of the world’s major designers of technological solutions and constructor of facilities needed in water and wastewater services.

ASE merged with VWS Envig (PTY) Ltd, the South African subsidiary of Veolia Water Solutions and Technology, on 14 November 2008.

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