公开(公告)号：WO1994013782A1

公开(公告)日：1994-06-23

申请号：PCT/GB1993002568

申请日：1993-12-16

Applicant: BIOTECHNA LIMITED ,  HUGHES, Martin, Neville ,  POOLE, Robert, Keith ,  BENNETT, Sarah, Melanie

Inventor： BIOTECHNA LIMITED

IPC: C12N01/00

CPC classification number: C12N1/005 ,  A23K10/16 ,  A23L29/065 ,  A23L33/16 ,  B01J20/24 ,  C02F1/286 ,  C02F3/327 ,  C02F3/34 ,  Y02W10/18

Abstract: Microbial biomass cells wherein at least one metal cationic species is attached to the surface of said cells in an amount sufficient to render the said cells effective to bind anions thereto, and wherein at least one anionic species is also bound to the surface of said cells. The invention also provides a method of making microbial biomass cells as claimed in any preceding claims which comprises: providing biomass cells within a culture medium, removing said cells from said medium and washing them, suspending the cells in a buffer medium, adding a quantity of the required cationic species in aqueous solution optionally to saturation of the binding sites therefor on the cell wall, adding a quantity of the required anionic species in aqueous solution optionally to saturation of the binding sites therefor on the cell wall, removing the treated biomass and washing, and drying the cells to form a solid product. A digestible, mineral-containing composition is also provided which contains biomass cells. For environmental clean-up applications there is also provided a method of reducing the concentration of at least one anionic species in an aqueous composition containing said species, which comprises bringing said aqueous composition into intimate contact with microbial biomass cells, to which at least one metal cationic species has been bound in a quantity sufficient to render said biomass cells receptive to bind said at least one anionic species, and optionally causing the said biomass cells to become regenerated with the same or different metal cationic species after anionic species have become bound to said biomass.

Abstract translation: 微生物生物质细胞，其中至少一种金属阳离子物质以足以使所述细胞有效结合阴离子的量连接到所述细胞的表面，并且其中至少一种阴离子物质也结合到所述细胞的表面。 本发明还提供了一种制备如前述权利要求中任一项所述的微生物生物细胞的方法，其包括：在培养基内提供生物质细胞，从所述培养基中除去所述细胞并洗涤，将细胞悬浮在缓冲介质中，加入一定量的 水溶液中所需的阳离子物质任选地在细胞壁上饱和其结合位点，在水溶液中加入一定量的所需阴离子物质，任选地饱和其在细胞壁上的结合位点，除去处理的生物质和洗涤 ，并干燥细胞以形成固体产物。 还提供含有生物质细胞的可消化的含矿物质组合物。 对于环境清理应用，还提供了降低含有所述物质的水性组合物中至少一种阴离子物质的浓度的方法，其包括使所述水性组合物与微生物生物质细胞紧密接触，至少一种金属 阳离子物质已经被结合到足以使所述生物质细胞接受结合所述至少一种阴离子物质的量，并且任选地使所述生物质细胞在阴离子物质已经结合到所述生物质细胞之后用相同或不同的金属阳离子物质再生 生物质。

公开(公告)号：WO1992016667A1

公开(公告)日：1992-10-01

申请号：PCT/AU1992000117

申请日：1992-03-20

Applicant: BAC TECH (AUSTRALIA) PTY. LTD. ,  SPENCER, Peter, Andrew ,  BUDDEN, Julia, Rose ,  BARRETT, Jack ,  HUGHES, Martin, Neville ,  POOLE, Robert, Keith

Inventor： BAC TECH (AUSTRALIA) PTY. LTD.

IPC: C22B03/18

CPC classification number: C22B3/18 ,  Y02P10/234 ,  Y10S423/17

Abstract: A process for recovering precious or base metals from particulate refractory sulfide materials comprises: a) contacting the sulfide material with an aqueous solution containing a thermotolerant bacteria culture capable of promoting oxidation of the sulfide material at a temperature in the range from 25 to 55 DEG C, b) separating the oxidized residue from the aqueous liquid, and, c) treating the oxidized residue and/or the aqueous liquid to recover metal. In this context, a thermotolerant bacterium is one which has an optimum growth temperature of 40 to 45 DEG C, and an operating temperature of 25 to 55 DEG C.

Abstract translation: 从颗粒耐火硫化物材料中回收贵金属或碱金属的方法包括：a）使硫化物材料与含有耐热细菌培养物的水溶液接触，所述耐热细菌培养物能够在25至55℃的温度范围内促进硫化物材料的氧化 b）从水性液体中分离氧化残余物，和c）处理氧化残余物和/或含水液体以回收金属。 在本文中，耐热细菌是具有40至45℃的最佳生长温度和25至55℃的操作温度的细菌。