ALGAL REMOVAL IN UNIT PROCESSES

THE ern Iowa streams, River, supports like most an midwestabundant ern streams, supports an abundant algal flora, frequently exceeding 10,000 organisms/ml of water and reaching maximum populations as high as 80,000 organisms/ml of water. Since the University of Iowa water treatment plant uses the river as a source of supply, these organisms must be removed in order to produce a potable water. It is desirable to increase the effi-