MDAO Medical Intelligent Sewage Treatment Device

The MDAO Medical Intelligent Domestic Sewage Treatment

Device of Wenyuan Environmental Protection Cabin Hospital

adopts ground-integrated sewage treatment equipment. 

The equipment integrates a regulating tank, pre-denitrification 

tank, anaerobic tank, anoxic tank, MBBR biochemical tank,

high-efficiency vertical flow sedimentation, and disinfection

tank. It has the advantages of a small footprint, high integration,

low investment, stable effluent, etc. The equipment has the

functions of IoT intelligence, which can realize remote monitoring

and convenient operation and maintenance. The effluent water 

quality meets the secondary standard of "Shandong Medical Pollutant 

Emission Standard" (DB37/596-2006), the emission standard of "Medical

Institution Water Pollutant Emission Standard" (GB18466-2005),

and the first-level B standard of the "Urban Sewage Treatment

Plant Pollutant Emission Standard" (GB18918-2002). The effluent

water quality meets the corresponding national and provincial 

emission standards. Since the effluent of this project is 

discharged into the municipal sewage, the effluent water quality 

is better than the municipal sewage standard and fully meets

the emission requirements. Given the particularity of

Fangcang Hospital, this project carried out pre-disinfection 

treatment at the source of sewage generation, and strengthened

disinfection measures at the front and end of the entire

process to ensure that the effluent water quality meets

the requirements.

The process adopted by this equipment is the A3/O (MBBR) 

process. The A3/O sewage biochemical treatment process is 

a comprehensive improvement of the traditional A/A/O (i.e. A2)

process. 

It optimizes the setting of the pre-denitrification zone,

anaerobic zone, anoxic zone, and aerobic zone with clear functions 

adds a front-end pre-denitrification zone, removes nitrate

nitrogen carried in the reflux mixed liquid ensures the 

excellent environment of anaerobic polyphosphate bacteria, 

improves the biological treatment efficiency of the reaction 

system, and enhances the effect of nitrogen removal and phosphorus

removal. 

The MBBR process has the advantages of both traditional

fluidized bed and biological contact oxidation, stable and reliable

operation, strong impact load resistance, good nitrogen removal effect,

and is an economical and efficient sewage treatment process with the

characteristics of the fast biochemical system startup, good nitrogen 

removal and phosphorus removal effect, less residual activated sludge,

and low investment and operation costs.