挪威渔业专家设计了一种简单的养鱼池用水再循环系统。其主要设备是一个沉水的充气上升流生物过滤器,能起到氧交换和空气中升流泵的作用,使鱼池中的水进行循环。由于水的循环,加上池底的特殊设计,使水中微粒物能很容易随废水排出,废水排放可以用定时器或水平面控制阀来控制。 Norwegian fishery experts have devised a simple fish pond water recirculation system. The main equipment is a submersible aerated upflow biofilter that functions as an oxygen exchange and ascending pump in the air to circulate water in the pond. Due to the circulation of water and the special design of the bottom of the pond, particulate matter in the water can be easily discharged with the wastewater. The wastewater discharge can be controlled by a timer or a horizontal control valve.