Wastewater treatment projects are mainly divided into municipal public works and industrial wastewater treatment projects, covering types such as domestic sewage, industrial wastewater, stormwater runoff, and medical wastewater. Specific classifications are as follows:
**Municipal Public Works:
**Project Content: Includes wastewater treatment plants, pipeline systems, pumping stations, etc., responsible for the collection, treatment, and discharge of urban domestic sewage and industrial wastewater.
Core Technologies: Employs physical, chemical, or biological treatment technologies, such as stormwater and sewage separation, and greywater reuse.
**Industrial Wastewater Treatment Projects:
**Industry Classification:
* Chemical Wastewater: High COD, high salinity, high toxicity, requiring anaerobic + aerobic combined processes or advanced oxidation technologies.
* Food Wastewater: High in organic matter but easily biodegradable, commonly using anaerobic digestion + biological contact oxidation.
* Dyeing and Printing Wastewater: High color, difficult to degrade, requiring coagulation sedimentation + membrane separation.
* Pharmaceutical Wastewater: High toxicity, requiring pretreatment + bio-enhanced treatment.
Electroplating wastewater: Exceeds heavy metal standards; treated with integrated sedimentation + ion exchange.
Papermaking wastewater: High suspended solids; requires physicochemical pretreatment + anaerobic + aerobic treatment.
Other categories: Rainwater runoff: Treated through physical methods such as sedimentation and filtration.
Medical wastewater: Requires disinfection (e.g., ultraviolet light, ozone) before discharge.
