Bidirectional flow pulse-based water body phosphorus removal apparatus and method, and organic nutrient soil

A bidirectional flow pulse-based water body phosphorus removal apparatus, wherein the water body phosphorus removal apparatus comprises:

• a prefiltration unit, a bidirectional flow phosphorus removal filtration pool, a bidirectional water collection and distribution system, a filtration pool stratified gas pulse system, a water production tank and a control system;
• a filtration layer filled with a phosphorus removal filtration material is provided in the bidirectional flow phosphorus removal filtration pool;
• the control system is used for controlling the bidirectional water collection and distribution system to alternately perform upward water in-and-out flow and downward water in-and-out flow on the bidirectional flow phosphorus removal filtration pool, so as to control the bidirectional flow phosphorus removal filtration pool to switch between an upward flow filtration adsorption mode for phosphorus removal and a downward flow filtration adsorption mode for phosphorus removal;
• and
• the control system is used for controlling the filtration pool stratified gas pulse system to perform stratified pulse gas flushing on the filtration layer.