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    PROCESS FOR THE TREATMENT OF WASTE WATER CONTAINING HEAVY METALS
    4.
    发明申请
    PROCESS FOR THE TREATMENT OF WASTE WATER CONTAINING HEAVY METALS 审中-公开
    用于处理含有重金属的废水的方法

    公开(公告)号：WO00039035A1

    公开(公告)日：2000-07-06

    申请号：PCT/NL1999/000815

    申请日：1999-12-29

    IPC分类号： C12N1/20 ,  B01J8/12 ,  B03B5/28 ,  B03B5/66 ,  C02F1/58 ,  C02F3/08 ,  C02F3/28 ,  C02F3/34 ,  C02F9/00 ,  C12R1/01

    CPC分类号： C02F3/345 ,  C02F3/107 ,  C02F3/2806 ,  C02F2101/006 ,  C02F2101/101 ,  C02F2101/20 ,  Y02W10/15 ,  Y10S210/912 ,  Y10S210/913

    摘要： A process for the treatment of waste water containing heavy metals is disclosed in which sulphur components and/or metals are biologically reduced to precipitate the metals as water-insoluble metal species, which are separated from the waste water. The biological reduction and the precipitation of the metal species are carried out in a moving sand bed, in which sand particles partly immobilise the bacteria and retain the precipitated metal species, treated waste water is separated from the precipitated metal species, and the precipitated metal species are subsequently separated from the sand particles. Metals like selenium and uranium can be precipitated without sulphur components, whereas metals like antimony, cadmium, copper, zinc and the like are precipitated as sulphides.

    摘要翻译： 公开了一种用于处理含重金属的废水的方法，其中硫成分和/或金属被生物降低以将金属沉淀为与废水分离的水不溶性金属物质。 金属物质的生物还原和沉淀在移动的砂床中进行，其中砂粒部分地固定细菌并保留沉淀的金属物质，处理的废水与沉淀的金属物质分离，沉淀的金属物质 随后与砂粒分离。 诸如硒和铀的金属可以没有硫成分沉淀，而诸如锑，镉，铜，锌等的金属作为硫化物沉淀。

    ALGAL TURF WATER PURIFICATION METHOD
    5.
    发明申请
    ALGAL TURF WATER PURIFICATION METHOD 审中-公开
    ALGAL TURF水净化方法

    公开(公告)号：WO98051627A1

    公开(公告)日：1998-11-19

    申请号：PCT/US1998/010005

    申请日：1998-05-15

    IPC分类号： C02F3/32

    CPC分类号： C02F3/32 ,  Y02W10/37 ,  Y10S210/906 ,  Y10S210/912 ,  Y10S210/913 ,  Y10S210/914

    摘要： A method for removing pollutants from water, according to the preferred embodiment of the present invention, comprises the steps of providing algal spores for seeding, providing a source of water for flowing through a floway, and the water contains a quantity of pollutants and has a pH on entry into said floway, providing a growing surface in the floway upon which the algal spores form an attachment, subjecting the algal spores in the floway to operating conditions resulting in the formation of an algal turf in which the algae has cell walls on its surface, adjusting the floway operating conditions such that a predetermined pollutant precipitates onto and/or into the algal cell walls but not into the water, and harvesting a portion of the algal turf including the cell walls onto and/or into which the pollutants have precipitated. By control of such floway operating conditions as water flow rate, light level, intensity and wavelength, water surge rate, recirculation rate, and nutrient concentrations, the pH of the water adjacent the algal cell wall is caused to increase to a level at which the desired pollutants precipitate. Since the operating conditions are carefully adjusted to allow the pH of the water to remain below the pH level normally required for precipitation, precipitation of the pollutants occurs only onto and/or into the algal cell wall, and not into the water column as a whole. No precipitation occurs in the water because its pH does not rise to the pH at which the pollutants of interest precipitate.

    摘要翻译： 根据本发明的优选实施方案，从水中除去污染物的方法包括以下步骤：提供用于播种的藻类孢子，提供流过水流的水源，并且水含有一定数量的污染物，并且具有 在进入所述流动时的pH，在藻类孢子形成附着物的流动中提供生长的表面，使流经中的藻类孢子经受操作条件，导致形成藻类草皮，其中藻类在其上具有细胞壁 调节流动操作条件，使得预定的污染物沉淀到藻类细胞壁上和/或进入藻细胞壁而不进入水中，并且将包含细胞壁的一部分藻类草皮收集到污染物沉淀的和/或其中 。 通过控制水流速度，光照水平，强度和波长，水浪涌速率，再循环速率和营养物浓度等流动操作条件，使藻类细胞壁附近的水的pH升高到 所需污染物沉淀。 由于仔细调整操作条件以使水的pH值保持低于通常沉淀所需的pH值水平，所以污染物的沉淀仅发生在和/或进入藻细胞壁，而不是整个水柱 。 由于其pH不升高到感兴趣的污染物沉淀的pH，所以在水中不会发生沉淀。

    WATER-SOLUBLE POLYMERS FOR RECOVERY OF METALS FROM SOLIDS
    6.
    发明申请
    WATER-SOLUBLE POLYMERS FOR RECOVERY OF METALS FROM SOLIDS 审中-公开
    用于从固体中回收金属的水溶性聚合物

    公开(公告)号：WO1996038227A1

    公开(公告)日：1996-12-05

    申请号：PCT/US1996007848

    申请日：1996-05-30

    申请人： THE REGENTS OF THE UNIVERSITY OF CALIFORNIA ,  SMITH, Barbara, F. ,  ROBISON, Thomas, W. ,  SAUER, Nancy, N. ,  EHLER, Deborah, S.

    发明人： THE REGENTS OF THE UNIVERSITY OF CALIFORNIA

    IPC分类号： B01J45/00

    CPC分类号： C22B3/16 ,  B09C1/02 ,  C22B3/0097 ,  Y02P10/234 ,  Y10S210/912 ,  Y10S210/913 ,  Y10S210/914

    摘要： A process of selectively separating a target metal contained in a solid matrix from the solid matrix by contacting the solid matrix containing a target metal with an aqueous solution including a water-soluble polymer adapted for complexation with the target metal for sufficient time whereby a water-soluble polymer-target metal complex is formed, and separating the solution including the water-soluble polymer-target metal complex from the solid matrix. The figure illustrates the process, wherein a metal containing feed solution is fed via line (1) to a solution of water soluble polymer in tank (2). A reaction mixture is conveyed via line (3), pump (4) and line (5) to separation device (6) which is preferably an ultrafilter. The separation is mormally accompanied by recirculating the mixture through the membrane device having a throttle valve (7) in line (8) to maintain a pressure of less than 60 psi in the membrane unit. Effluent in line (9) is free of the target metal.

    摘要翻译： 通过使包含目标金属的固体基质与包含适于与目标金属络合的水溶性聚合物的水溶液接触足够的时间，将含有固体基质的目标金属从固体基质中选择性分离足够的时间， 形成可溶性聚合物 - 靶金属络合物，并从固体基质中分离包含水溶性聚合物 - 靶金属络合物的溶液。 该图说明了该方法，其中含金属的进料溶液通过管线（1）进料到罐（2）中的水溶性聚合物溶液中。 将反应混合物通过管线（3），泵（4）和管线（5）输送到优选为超滤器的分离装置（6）。 分离通常伴随着使混合物通过具有在管线（8）中的节流阀（7）的膜装置再循环以在膜单元中保持小于60psi的压力。 管线（9）中的流出物没有目标金属。

    METHOD TO DETOXIFY SEWAGE SLUDGE
    7.
    发明申请
    METHOD TO DETOXIFY SEWAGE SLUDGE 审中-公开
    消除污水污泥的方法

    公开(公告)号：WO1992007799A1

    公开(公告)日：1992-05-14

    申请号：PCT/US1991008056

    申请日：1991-10-30

    申请人： RESIDUAL MANAGEMENT, INC.

    发明人： RESIDUAL MANAGEMENT, INC. ,  RASMUSSEN, Hans, W. ,  ROCKANDEL, Michael, A.

    IPC分类号： C02F11/14

    CPC分类号： C02F9/00 ,  C02F1/725 ,  C02F11/004 ,  C02F2101/20 ,  Y10S210/901 ,  Y10S210/912 ,  Y10S210/913

    摘要： A method to detoxify municipal sewage sludge containing heavy metals comprises the steps of mixing in a vessel (12) sewage sludge, at least one catalytic oxidant (24) such as a ferric salt, at least one regenerative oxidant through a pump (36) and an acid (16) to form a reacting slurry having a solids fraction and a liquid fraction and, after a suitable retention time, separating the solids fraction from the liquid fraction. The reacting slurry is maintained during its retention time at pH range between approximately 1.0 to 2.0 and at an oxidation reduction potential of, at least, +400 millivolts. The heavy metals originally absorbed into the solids fraction of the sewage sludge solubilize into the liquid fraction of the reacting slurry. Thereafter, the reacting slurry is discharged into a conventional solids/liquid separating device (42) so that the metal-laden liquid fraction becomes separated from the solids fraction which is now substantially barren of heavy metals. The solids fraction is neutralized to a pH prescribed by EPA regulations so that it can be safely applied to agricultural land as a detoxified fertilizer and soil conditioner.