Water Purification System and Apparatus (Algal Turf Scrubber) Water Purification System and Apparatus (Algal Turf Scrubber)000Adey, Walter H. 1982. "Water Purification System and Apparatus (Algal Turf Scrubber)." United States Patent, 000.More...ID: 24889Type: articleKeywords: NH-Botany; NMNH