INTRODUCTIONAbout one billion people do not have healthydrinking water. More than six million people (about twomillion children) die because of diarrhea which is causedby polluted water. Developing countries pay a high costto import chemicals including polyaluminium chloride andalum [1, 2]. This is the reason why these countries needlow cost methods requiring low maintenance and skill.Nowadays, polyaluminum Chloride is widely used inwater treatment plants all over the world. Polyaluminiumchloride and alum add impurities such as epichlodine arecarcinogenic [3, 4]. Aluminum is regarded as an importantpoisoning factor in dialysis encephalopathy. Aluminum is
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