Abstract: A bidirectional flow pulse-based water body phosphorus removal apparatus and a method, and an organic nutrient soil. The water body phosphorus removal apparatus includes: 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.

Abstract: A charging cabinet system includes a power supply system, a controlling and displaying system, and a plurality of charging compartments. The power supply system is connected with the controlling and displaying system. The charging compartment is connected with both the power supply system and the controlling and displaying system. The charging compartment includes: a charging module for charging a low-power battery; a driving module for moving the battery out of the charging compartment or moving the battery into the charging compartment; a detection module for detecting whether a fully charged battery is picked by a user after being moved out of the charging compartment for a period of time; and a controller connected with the charging module, the driving module and the detection module, and connected with the controlling and displaying system. The technical effect of the disclosure is that it can effectively prevent the battery from being lost.

Abstract: A charging compartment system and relates to a technical field of charging device, the charging compartment system includes a charging module for charging a low-power battery; a driving module for moving a battery out of or into the charging compartment; a controller electrically connected with both the charging module and the driving module. The charging compartment system further includes a detection module for detecting whether a fully charged battery is picked by a user after being moved out of the charging compartment for a period of time, if the fully charged battery is not picked, the driving module moves the fully charged battery into the charging compartment, and if the fully charged battery is picked, the controller prompts that the charging compartment is an empty charging compartment. The disclosure has technical effect that the charged battery can be ejected, and users can save time and labor when picking the battery.