Expressway sewage treatment is not a technical and standard problem, but an operation and management problem. According to reports, China's expressway travel has typical tidal characteristics, with few people at ordinary times and a sharp increase in holidays. This makes the construction and management of sewage treatment facilities in expressway service area face a dilemma. If the sewage treatment system is configured according to the holiday level, it will cause waste at ordinary times. If it is configured according to the number of people who usually travel, holidays can't meet the demand. In order to save electricity, some service areas even shut down sewage treatment equipment when there are few people.
At present, the mainstream ecological sewage treatment technology, its principle is to devour sewage with biological strains, and then purify and recycle it. In the off-season, insufficient sewage is likely to lead to bacterial death, so how to determine the sewage treatment capacity has become a difficult problem for all service areas. In addition, services such as catering and refueling in expressway service areas are subcontracted to various operators through contract system, but many service areas of sewage treatment are not handled by special personnel.