Search results for ‘Donald M. D. Gray (Gabb)’

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      Cover image for Pathogen Destruction Efficiency In High Temperature Digestion
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      Pathogen Destruction Efficiency In High Temperature Digestion

      Donald M. D. Gray (Gabb)

      The purpose of this research was to evaluate and compare various thermophilic anaerobic digestion processes for meeting U.S. EPA biosolids Class A pathogen standards. The project was split into three…

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      Cover image for Develop and Demonstrate Fundamental Basis for Selectors to Improve Activated Sludge Settleability
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      Develop and Demonstrate Fundamental Basis for Selectors to Improve Activated Sludge Settleability

      Donald M. D. Gray (Gabb),Vincent P. De Lange,Mark H. Chien

      Successful operation of the activated sludge process relies heavily on the ability to effectively separate mixed liquor into return activated sludge (RAS) and a high quality final effluent. Solids separation…

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