The selection of appropriate wastewater treatment methods depends on a comprehensive evaluation of multiple factors, including the characteristics of the wastewater such as composition, concentration, temperature, pH value, and biodegradability (BOD/COD ratio), as well as the presence of toxic or harmful substances. Other key considerations include the required effluent quality, discharge standards, treatment capacity, available land area, investment budget, operating costs, energy consumption, and supporting conditions such as power supply and chemicals. It is also necessary to take into account the expected level of automation, construction and installation conditions, ease of operation and maintenance, sludge production and disposal, future expansion requirements, and local environmental regulations. Only by comprehensively analyzing these factors can the most suitable, reliable, and economical treatment process be determined.