Environmental wastewater treatment is a complex process involving multiple stages and technologies, aimed at removing harmful substances from wastewater to meet discharge standards or enable reuse.

Common Wastewater Treatment Technologies and Methods:

Continuous Circulation Aeration System (CCAS): A continuous inflow SBR aeration system that completes carbon removal, nitrogen removal, and phosphorus removal through pre-treatment, reaction, sedimentation, and drainage steps, in the "aerobic-anoxic" and "aerobic-anaerobic" cycles.

A/O and A2/O Processes: These processes are designed to remove organic pollutants, nitrogen, and phosphorus from wastewater. The A2/O process is a combination of the traditional activated sludge process, biological nitrification and denitrification processes, and biological phosphorus removal processes.

Septic Tank Technology: Primarily used for the collection and preliminary treatment of domestic wastewater. Septic tanks not only collect wastewater but also remove part of the organic matter through the metabolic action of microorganisms.

Artificial Fast Infiltration: The alternating anaerobic and aerobic operation state formed in the soil layer is conducive to the removal of nitrogen and phosphorus.

Ecological Pond: An advanced wastewater treatment technology developed from oxidation ponds, primarily used for the secondary deep treatment of wastewater.

The basic steps for wastewater treatment include:

Wastewater Collection: Concentrating wastewater through sewage pipelines for subsequent treatment.

Wastewater Regulation: Adjusting the volume and quality of wastewater to ensure the stable operation of subsequent treatment equipment.

Biological Treatment: Utilizes the metabolic activities of microorganisms to decompose organic matter in wastewater into simple inorganic substances.