Abstract: A method and a system for a continuous-flow aerobic granular sludge (AGS) process with improved two-stage sedimentation are provided. The method includes the following steps: arranging a biochemical reaction tank, a granular sludge sedimentation tank, and an inclined plate sedimentation tank that are connected sequentially, and arranging an inclined device in the inclined plate sedimentation tank; allowing sewage to continuously flow into the biochemical reaction tank, and allowing a sludge-water mixture obtained after a biochemical reaction to enter the granular sludge sedimentation tank, such that heavy sludge in the sludge-water mixture is quickly settled in the granular sludge sedimentation tank and returned to the biochemical reaction tank; and allowing light flocculent sludge in the sludge-water mixture to flow into the inclined plate sedimentation tank.

Abstract: The invention relates to a ventilation element for the introduction of a gas into a liquid, having at least one gas port, having at least one carrier plate and having at least one elastically deformable diaphragm which is connected to the at least one gas port and/or to the at least one carrier plate. A space that can be formed between the at least one diaphragm and the at least one carrier plate is connected in terms of flow to the gas port. The at least one carrier plate has a multiplicity of gas outlet openings, and at least one diaphragm is composed at least in sections of a material with a lower density than water, or is equipped with at least one float body which has a lower density than water.

Abstract: A horizontal-flow sand filtration pool and a water treatment process thereof. The horizontal-flow sand filtration pool includes a pool body, a raw water inlet assembly, a sand filtration bed, a filtered water outlet assembly, an aeration assembly, and a back washing assembly; the raw water inlet assembly includes a water inlet pipe and a water distribution device that supplies raw water to the sand filtration bed; the water inlet pipe is connected with the water distribution device, the water distribution device is provided in the sand filtration bed, and a plurality of water outlet channels are uniformly distributed on the vertical surface of the water distribution device; the filtered water outlet assembly includes a water collector and a water outlet pipe; the water outlet pipe is communicated with the water collector; the back washing assembly includes a back washing pipe and a drainage pipe.

Abstract: The invention relates to a ventilation element for the introduction of a gas into a liquid, having at least one gas port, having at least one carrier plate and having at least one elastically deformable diaphragm which is connected to the at least one gas port and/or to the at least one carrier plate. A space that can be formed between the at least one diaphragm and the at least one carrier plate is connected in terms of flow to the gas port. The at least one carrier plate has a multiplicity of gas outlet openings, and at least one diaphragm is composed at least in sections of a material with a lower density than water, or is equipped with at least one float body which has a lower density than water.

Abstract: A horizontal-flow sand filtration pool and a water treatment process thereof. The horizontal-flow sand filtration pool includes a pool body, a raw water inlet assembly, a sand filtration bed, a filtered water outlet assembly, an aeration assembly, and a back washing assembly; the raw water inlet assembly includes a water inlet pipe and a water distribution device that supplies raw water to the sand filtration bed; the water inlet pipe is connected with the water distribution device, the water distribution device is provided in the sand filtration bed, and a plurality of water outlet channels are uniformly distributed on the vertical surface of the water distribution device; the filtered water outlet assembly includes a water collector and a water outlet pipe; the water outlet pipe is communicated with the water collector; the back washing assembly includes a back washing pipe and a drainage pipe.