Automatic adjustment sewage treatment system and method suitable for expressway service area

Abstract

The invention discloses an automatic adjustment sewage treatment system suitable for an expressway service area. The automatic adjustment sewage treatment system comprises a first sewage treatment unit, a second sewage treatment unit and a communication pipe, the first sewage treatment unit and the second sewage treatment unit each comprise a pretreatment tank, a regulatingt tank, a biological treatment tank, a sedimentation tank, a disinfection tank and a water outlet tank; the regulating tank of the first sewage treatment unit communicates with the regulating tank of the second sewage treatment unit through the communicating pipe; an ammonia nitrogen online detector, an intercommunication pump and an emergency pump are arranged in each regulating tank; and the biological treatment tank comprises an anoxic zone, an adjustable zone, a first aerobic zone and a second aerobic zone. The treatment system is high in treatment stability of sewage generated in an expressway service area, low in ammonia nitrogen concentration emission and capable of meeting emission requirements. The invention further discloses a sewage treatment method which is flexible in treatment mode, low in cost and capable of effectively avoiding the situation that high-concentration ammonia-nitrogen sewage in the peak period has toxic action on microorganisms of the biochemical system, so that the biochemical system collapses, and effluent exceeds the standard.

Description

technical field [0001] The invention belongs to the technical field of water environment pollution control, and in particular relates to an automatic adjustment sewage treatment system and method suitable for expressway service areas. Background technique [0002] The sewage in expressway service areas mainly comes from fecal wastewater discharged from public toilets, and its characteristic pollution factor is ammonia nitrogen. Therefore, compared with general domestic sewage, the core issue of sewage treatment in expressway service areas lies in the control of ammonia nitrogen pollution. Affected by changes in the flow of people and vehicles, the sewage water quality in the service area presents obvious fluctuations. Taking a service area in Guangzhou as an example, the concentration of ammonia nitrogen in the sewage in the service area remained at a low level from Monday to Thursday, generally fluctuating between 38-76 mg / L; from Friday to Sunday, with the increase of traf...

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Problems solved by technology

However, the automaticity of this patent is poor, and it is necessary to manually detect the water quality and adjust the position of the plugboard; in addition, compared with the rural sewage, the water quality of the sewage in the expressway service area varies greatly, and the concentration of ammonia nitrogen in the sewage during the peak period can be as high as 300mg / L, the sewage treatment device may not be able to adapt to the impact load of the sewage in the peak period of the expressway service area, resulting in the collapse of the biochemical system

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