Dissimilatory sulfate reduction as a process to promote denitrification in marine recirculating aquaculture systems
    1.
    发明授权
    Dissimilatory sulfate reduction as a process to promote denitrification in marine recirculating aquaculture systems 有权
    脱硫硫酸盐还原作为促进海洋循环水产养殖系统脱氮的过程

    公开(公告)号:US07462284B2

    公开(公告)日:2008-12-09

    申请号:US10588256

    申请日:2005-01-31

    IPC分类号: A01K63/04 C02F3/30

    摘要: The present invention relates to a novel approach for nitrate removal from a marine recirculating system (10) wherein high concentrations of sulfate found in seawater is used in combination with sludge (20) collected from fish growing tanks (12) to promote dissimilatory sulfate reduction to hydrogen sulfide. The sulfide is used as an electron source to promote autotrophic denitrification in an up-flow fix bed bioreactor (16), followed by nitrification in a nitrification unit (14). By utilizing the symbiotic relationship between the sulfate-reducing and sulfide-oxidizing bacterial community, nitrate accumulation is controlled in the recirculating water of the system thereby reducing water exchange in the marine recirculating system.

    摘要翻译: 本发明涉及从海洋循环系统(10)中去除硝酸盐的新方法,其中在海水中发现的高浓度硫酸盐与从鱼生长池(12)收集的污泥(20)结合使用以促进异硫酸盐还原 硫化氢。 硫化物用作电子源以促进上流固定床生物反应器(16)中的自养反硝化,随后在硝化单元(14)中硝化。 通过利用硫酸盐还原和硫化物氧化细菌群落之间的共生关系,在系统的再循环水中控制硝酸盐积累,从而减少海洋循环系统中的水交换。

    Aquaculture nitrogen waste removal
    2.
    发明授权
    Aquaculture nitrogen waste removal 有权
    水产养殖除氮废水

    公开(公告)号:US07082893B2

    公开(公告)日:2006-08-01

    申请号:US10818136

    申请日:2004-04-05

    IPC分类号: C02F3/32 A01K63/04

    摘要: The present invention relates to a two-stage biofilter reactor system for removing nitrogenous compounds from a recirculating aquaculture system. The system includes a aerobic nitrification unit and a downstream anaerobic denitrification unit, wherein both units have a mobile bed of suspended media whereon bacteria can grow and reduce nitrate and/or ammonia levels in the recirculating aquaculture system. Use of the two-stage system has the advantage of reducing the water exchange rates and consumption of salt when maintaining a saline effluent.

    摘要翻译: 本发明涉及用于从循环水产养殖系统中除去含氮化合物的两级生物过滤器反应器系统。 该系统包括需氧硝化单元和下游厌氧反硝化单元,其中两个单元具有悬浮介质的移动床,细菌可以生长并减少再循环水产养殖系统中的硝酸盐和/或氨水平。 使用两级系统具有在保持盐水流出物时降低水的交换率和消耗盐的优点。