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Publish Date : 01-Aug-2014

The reverse osmosis filter elements of the specialty chemicals company LANXESS are helping to supply clean drinking water in northern Ghana. The water-treatment plant of Mazareka Co. Ltd., which is based in Tamale/Kanshegu, is equipped with Lewabrane RO B400 HR membrane elements. It has a capacity of 40 cubic meters per hour and supplies water for approximately 600,000 persons. That includes the 400,000 residents of Tamale, the capital of Northern Region, and neighboring communities within a radius of 200 kilometers. Application technology from the Liquid Purification Technologies (LPT) business unit at LANXESS helped with the design of the filter system used by the plant. “We also taught the employees of Mazareka how to use the Lewaplus design software, so that any necessary adjustments can be made to the equipment if there is a change in parameters,” says Dr. Jens Lipnizki, Head of Technical Marketing Membranes at LPT.

The spiral-wound Lewabrane RO B400 HR module consists of a polyamide composite membrane and was developed for industrial water treatment and the purification of drinking water. The outstanding feature of the Lewabrane HR (high rejection) membrane is its high retention of critical components such as nitrates and organic compounds. It delivers excellent permeate quality and satisfies NSF/ANSI Standard 61 for drinking water system components.

Water is a rare good – and it is rarely good straight from the tap
Mazareka’s modern drinking water treatment plant is the first of its kind in the northern region of Ghana. The supply of drinking water is especially poor in this part of the country, with approximately half of the population having no access to clean drinking water at all, according to official statistics. Because of infrastructure problems and aging pipes — the current water distribution system is 80 years old in some places — more and more households are depending on water from plastic containers and tanker deliveries. Water commonly comes in the form of one-half-liter plastic bags of normal tap water, from which only the suspended solids have been filtered out. These "sachets" cost the equivalent of about three euro cents and are easy to use: Bite off a corner, suck out the water, and throw it away. But the quality of the water and its taste often leave something to be desired. Mazareka has therefore set itself the goal of combining the best hygienic practices with modern reverse osmosis technology to produce high-quality water for safe consumption. "We have a major competitive advantage over the few producers in the south of the country, who have to pay high transportation costs to bring their products north," says Dieter Heinrich, an industrial foreman from Saarland, Germany.

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