Characteristics of
Expressway Wastewater
The sewage in the expressway service station mainly comes from toilet water, flushing wastewater, catering wastewater, cleaning water, etc. Affected by the weather, season, time period and other special conditions, the traffic flow will be very random, which will lead to the low load operation of the influent water quality.
The water volume in holidays and festivals fluctuates greatly. In particular, there is a lot of sewage in toilets and showers, resulting in high concentrations of ammonia nitrogen and SS in the sewage in the service station and the water volume may be different every hour, every day, day and night. Due to the geographical restriction, the urban sewage pipe network cannot be arranged, and the discharge standard must meet the class I, A standard in the discharge standard of pollutants for urban sewage treatment plants (GB18918-2002).
