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5366558 Method of treating biomass material
PATENT ABSTRACTS
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sludge, which is settleable, and treated wastewater from the aerobic culture in the second chamber. In the system, one portion of the activated sludge from the activated sludge separator is fed to the first chamber, to seed culture growth there, and another portion of the activated sludge is recycled to the second chamber, to seed culture growth there.
5364787
GENES AND E N Z Y M E S I N V O L V E D IN THE M I C R O B I A L D E G R A D A T I O N OF PENTACHLOROPHENOL Orser Cindy S: Xun Luyin, Moscow, ID, UNITED STATES - Idaho Research Foundation Three purified proteins, PcpA, PcpB and PcpC, are disclosed. These proteins are involved in the breakdown of pentachlorophenol and other halogenated phenols by the bacterium Flavobacterium sp. Strain ATCC 39723. Three cloned genes, pcpA, pcpB and pcpC, which encode these proteins are also disclosed. The pure proteins and cloned genes can be used in bioremediation applications.
5366558 M E T H O D OF T R E A T I N G BIOMASS M A T E R I A L Brink David, Berkeley, STATES
stages are selected to maximize production of the desired monosaccharide or monosaccharides.
5366633
PROCESS FOR THE T R E A T M E N T OF W A T E R CONTAINING SULPHUR COMPOUNDS Buisman Cees J Paques B V -
PCT No. PCT/NL91/00059 Sec. 371 Date Nov. 19, 1991 Sec. 102(e) Date Nov. 19, 1991 PCT Filed Apr. 11, 1991 PCT Pub. No. WO91/16269 PCT Pub. Date Oct. 31, 1991.A process is provided for the treatment of water containing sulphide wherein the sulphide is oxidized in an aerobic reactor having a minimum sulphide sludge load. The minimum sulphide load is at least 10 mg of sulphide per mg of the nitrogen present in the sludge per hour, the sludge load being calculated on the basis of the sulphide oxidizing part of the biomass. The minimum sulphide load may also be defined as 25 mg of sulphide per liter of reactor material per hour. The sulphide can be largely oxidized to elemental sulphur which is then separated and reused. Waste water also containing organic matter in addition to varying levels of sulphide is purified without interference of filamentous bacteria using a two step aerobic process. The process for sulphide removal can be used for the treatment of waste water having high levels of sulphur compounds such as sulphate, sulphite and thiosulphate by first reducing these sulphur compounds in an aerobic step. Heavy metals are removed from water by adding sulphide to the water and precipitating the metals as sulphides; the sulphide can be added by reducing sulphur compounds already present.
CA, 94708, UNITED
Two stage hydrolysis of lignocellulosic material, conditions during the first stage being such as to hydrolyze or depolymerize the hemicellulosic component without substantial degradation of resulting monosaccharides, conditions during the second stage being s u c h as to hydrolyze the cellulose to glucose without substantial degradation of the glucose. The solids left after first stage hydrolysis are disintegrated mechanically thereby greatly facilitating second stage hydrolysis. Hydrolysis in both stages is preferably accomplished by the use of nitric acid. The pH retention time and temperature in both
5366891 BIOCHEMICAL S O L U B I L I Z A T I O N OF TOXIC SALTS F R O M RESIDUAL G E O T H E R M A L BRINES AND WASTE WATERS
Premuzic Eugene; Lin Mow S, East Moriches, NY, UNITED STATES - Associated Universities [nc
124
sludge, which is settleable, and treated wastewater from the aerobic culture in the second chamber. In the system, one portion of the activated sludge from the activated sludge separator is fed to the first chamber, to seed culture growth there, and another portion of the activated sludge is recycled to the second chamber, to seed culture growth there.
5364787
GENES AND E N Z Y M E S I N V O L V E D IN THE M I C R O B I A L D E G R A D A T I O N OF PENTACHLOROPHENOL Orser Cindy S: Xun Luyin, Moscow, ID, UNITED STATES - Idaho Research Foundation Three purified proteins, PcpA, PcpB and PcpC, are disclosed. These proteins are involved in the breakdown of pentachlorophenol and other halogenated phenols by the bacterium Flavobacterium sp. Strain ATCC 39723. Three cloned genes, pcpA, pcpB and pcpC, which encode these proteins are also disclosed. The pure proteins and cloned genes can be used in bioremediation applications.
5366558 M E T H O D OF T R E A T I N G BIOMASS M A T E R I A L Brink David, Berkeley, STATES
stages are selected to maximize production of the desired monosaccharide or monosaccharides.
5366633
PROCESS FOR THE T R E A T M E N T OF W A T E R CONTAINING SULPHUR COMPOUNDS Buisman Cees J Paques B V -
PCT No. PCT/NL91/00059 Sec. 371 Date Nov. 19, 1991 Sec. 102(e) Date Nov. 19, 1991 PCT Filed Apr. 11, 1991 PCT Pub. No. WO91/16269 PCT Pub. Date Oct. 31, 1991.A process is provided for the treatment of water containing sulphide wherein the sulphide is oxidized in an aerobic reactor having a minimum sulphide sludge load. The minimum sulphide load is at least 10 mg of sulphide per mg of the nitrogen present in the sludge per hour, the sludge load being calculated on the basis of the sulphide oxidizing part of the biomass. The minimum sulphide load may also be defined as 25 mg of sulphide per liter of reactor material per hour. The sulphide can be largely oxidized to elemental sulphur which is then separated and reused. Waste water also containing organic matter in addition to varying levels of sulphide is purified without interference of filamentous bacteria using a two step aerobic process. The process for sulphide removal can be used for the treatment of waste water having high levels of sulphur compounds such as sulphate, sulphite and thiosulphate by first reducing these sulphur compounds in an aerobic step. Heavy metals are removed from water by adding sulphide to the water and precipitating the metals as sulphides; the sulphide can be added by reducing sulphur compounds already present.
CA, 94708, UNITED
Two stage hydrolysis of lignocellulosic material, conditions during the first stage being such as to hydrolyze or depolymerize the hemicellulosic component without substantial degradation of resulting monosaccharides, conditions during the second stage being s u c h as to hydrolyze the cellulose to glucose without substantial degradation of the glucose. The solids left after first stage hydrolysis are disintegrated mechanically thereby greatly facilitating second stage hydrolysis. Hydrolysis in both stages is preferably accomplished by the use of nitric acid. The pH retention time and temperature in both
5366891 BIOCHEMICAL S O L U B I L I Z A T I O N OF TOXIC SALTS F R O M RESIDUAL G E O T H E R M A L BRINES AND WASTE WATERS
Premuzic Eugene; Lin Mow S, East Moriches, NY, UNITED STATES - Associated Universities [nc