Algal Turf Scrubbing (ATS) is applicable to the cleaning of a wide range of degraded point sources including municipal, agricultural and industrial waste waters. We provide three examples of a large number of possibilities.

Figure 1:
500 foot, 400,000 gpd ATS floway for tertiary treatment of municipal sewage at Patterson, California. The yearly mean average productivity of this ATS was 35g (dry wgt. of algae)/m2/day. Nitrogen was removed at 1.11gN/m2/day and phosphorus at 0.73gp/m2/day, as yearly means.

Figure 2:
Test system for the complex waste of a large pharmaceutical plant. The oxygen saturated ATS output, when treated with U.V. lighting, broke down a complex of carcinogenic synthetic chlorinated hydrocarbons, including trichloroethylene and vinyl chloride, as well as up-taking a variety of heavymetals. The carbon released by the degradation of the hydrocarbons was taken up by the algal biomass.

Figure 3:
Walter Mulbry and his team at the U.S. Dept. of Agriculture in Beltsville, Maryland have been experimenting with ATS cleanup of dairy manure wastewater. Starting with small ATS units, like the one shown here, they have expanded to larger raceways similar to the one shown above for Patterson. They have shown that the algal biomass derived through ATS from a 100 cow dairy farm can provide a high grade fertilizer for 15 acres of corn. This process would be “double duty” in preventing farm nutrients from reaching rivers and bays.