1
Lennart G Erickson, Howard E Worne: Wastewater energy recycling method. Townsend and Townsend, July 3, 1979: US04159944 (73 worldwide citation)

An auxiliary process and method for use in wastewater treatment plants, modifying conventional primary and secondary treatment, to condition the effluent for use as agricultural irrigation water containing liquified fertilizer and soil amendment materials. Primary sludge and skimmed materials are co ...


2
Lennart G Erickson, Howard E Worne: Organic sludge-energy recycling method. Townsend and Townsend, August 3, 1982: US04342650 (42 worldwide citation)

A method is described for converting substantially untreated organic sludge into useful substances. The sludge may include primary sludge, a mixture of primary and secondary sludges from municipal wastewater treatment facilities, slurries of agricultural manure, and other organic wastes. The sludge ...


3
Lennart G Erickson, Howard E Worne: Bio-protein feed manufacturing method. Townsend and Townsend, August 9, 1977: US04041182 (40 worldwide citation)

A five-step manufacturing method using broad spectrum hydrolytic enzymes to decompose the volatile fraction of organic waste materials into lower molecular weight, intermediate substrate nutrients to be consumed in turn by selected microorganisms to produce a cellular biomass of microbial cells subs ...


4
Howard E Worne, Irving Rabinovitch: Process of microbial extraction of hydrocarbons from oil sands. Larson and Taylor, September 14, 1982: US04349633 (38 worldwide citation)

A process is described for the separation of hydrocarbon residues from oil and tar sands by microbiological activity. Hydrocarbon residues are released from the sands by contacting with a suspension of oxidase-synthesizing, hydrocarbon-metabolizing microorganisms.


5
Lennart G Erickson, Howard E Worne: Biological sludge-energy recycling method. Townsend and Townsend, May 12, 1981: US04267049 (25 worldwide citation)

A method is described for converting treated sludge into an improved concentrated organic feedstock. The method includes conditioning of sludge with hydrolytic enzymes, the mechanical disintegration of tissue and cell components, the removal of heavy metals, autolysis and dewatering to produce an or ...


6