Combined biological and ballasted flocculation process for treating wastewater: U.S. Patent No. 7,323,108
Method of treating stormwater runoff and domestic waste with coal ash: U.S. Patent No. 7,311,844
Method for treating water by ballasted flocculation and decantation: U.S. Patent No. 7,311,841
Non- toxic hydrophobic elastomeric polymer chemistry system for wood preservation: U.S. Patent No. 7,008,997