公开(公告)号：US07279103B2

公开(公告)日：2007-10-09

申请号：US11224039

申请日：2005-09-13

申请人： John Burckle ,  Rakesh Govind ,  Fred Kawahara ,  Richard Scharp ,  Henry Tabak

发明人： John Burckle ,  Rakesh Govind ,  Fred Kawahara ,  Richard Scharp ,  Henry Tabak

IPC分类号： C02F1/62 ,  C02F101/20

CPC分类号： C02F3/345 ,  C02F1/66 ,  C02F1/68 ,  C02F1/685 ,  C02F9/00 ,  C02F2101/20 ,  C02F2103/10 ,  Y10S210/912

摘要： Acidic metal-bearing wastewaters are treated to produce a finished water of sufficient purity to meet discharge standards while recovering metals removed in forms which are commercially valuable. The metals are selectively precipitated, either in a batch or in a continuous system, for removal of individual metal products in a specific sequence of steps from the wastewater. In each step, the pH is adjusted to the specific pH range and sulfide ion is introduced to precipitate the metals, excepting the removal of ferric iron and aluminum which is achieved using hydroxide precipitation. Bioconversion process using unique equipment converts sulfate in the wastewater to the hydrogen sulfide gas required for the precipitation process. This bioconversion process reduces the sulfate in the wastewater so that the water can be directly discharged or used for agricultural applications.

摘要翻译： 处理酸性含金属废水以生产足够纯度的成品水以满足排放标准，同时回收以商业价值的形式除去的金属。 以分批或连续的方式选择性地沉淀金属，以从废水中以特定的步骤顺序除去各种金属产物。 在每个步骤中，将pH调节至特定的pH范围，并引入硫化物离子以沉淀金属，除了使用氢氧化物沉淀实现的三价铁和铝的除去。 使用独特设备的生物转化过程将废水中的硫酸盐转化为沉淀过程所需的硫化氢气体。 这种生物转化过程减少了废水中的硫酸盐，使得水可以直接排放或用于农业应用。

公开(公告)号：US20070090057A1

公开(公告)日：2007-04-26

申请号：US11224039

申请日：2005-09-13

申请人： John Burckle ,  Rakesh Govind ,  Fred Kawahara ,  Richard Scharp ,  Henry Tabak

发明人： John Burckle ,  Rakesh Govind ,  Fred Kawahara ,  Richard Scharp ,  Henry Tabak

IPC分类号： C02F1/52

CPC分类号： C02F3/345 ,  C02F1/66 ,  C02F1/68 ,  C02F1/685 ,  C02F9/00 ,  C02F2101/20 ,  C02F2103/10 ,  Y10S210/912

摘要： Acidic metal-bearing wastewaters are treated to produce a finished water of sufficient purity to meet discharge standards while recovering metals removed in forms which are commercially valuable. The metals are selectively precipitated, either in a batch or in a continuous system, for removal of individual metal products in a specific sequence of steps from the wastewater. In each step, the pH is adjusted to the specific pH range and sulfide ion is introduced to precipitate the metals, excepting the removal of ferric iron and aluminum which is achieved using hydroxide precipitation. Bioconversion process using unique equipment converts sulfate in the wastewater to the hydrogen sulfide gas required for the precipitation process. This bioconversion process reduces the sulfate in the wastewater so that the water can be directly discharged or used for agricultural applications.

摘要翻译： 处理酸性含金属废水以生产足够纯度的成品水以满足排放标准，同时回收以商业价值的形式除去的金属。 以分批或连续的方式选择性地沉淀金属，以从废水中以特定的步骤顺序除去各种金属产物。 在每个步骤中，将pH调节至特定的pH范围，并引入硫化物离子以沉淀金属，除了使用氢氧化物沉淀实现的三价铁和铝的除去。 使用独特设备的生物转化过程将废水中的硫酸盐转化为沉淀过程所需的硫化氢气体。 这种生物转化过程减少了废水中的硫酸盐，使得水可以直接排放或用于农业应用。