First, the discharge standards of hospital sewage treatment are different, and the discharge standards of hospital sewage are also different. Generally speaking, the discharge standards of hospital sewage can be divided into two types: the discharge standards of infectious hospitals and the discharge standards of general hospitals (non-infectious hospitals). During the epidemic period, the discharge standards of local hospitals may be slightly different from the requirements of local environmental protection bureaus.

Second, the choice of disinfectants for hospital sewage treatment. The commonly used disinfection methods in hospital sewage treatment stations include ozone disinfection, chlorine dioxide disinfection and ultraviolet disinfection.

Third, the hospital sewage treatment operation focus?

1. What are the key points of aerobic operation?

Maintenance of aerobic section should pay attention to the following indicators:

A, SV30 is maintained at 20-30%.

B, the ph is maintained at around 7.5.

C, the temperature is controlled between 25 and 35 degrees Celsius.

D, dissolved oxygen is 4 mg/L.

E, the ratio of carbon, nitrogen and phosphorus should be controlled at 100:5: 1.

F, when controlling the sludge reflux ratio, if SV30 is lower than 30%, it is necessary to increase the reflux flow to prevent sludge from escaping; When SV30 is higher than 30%, it is necessary to reduce reflux and increase sludge beating.

2, disinfection section operation focus

The sewage treatment station of infectious disease hospital generally adopts the secondary enhanced sewage treatment process of pre-disinfection+secondary treatment+advanced treatment+disinfection process; General hospitals (non-infectious hospitals) generally adopt the first-level enhanced sewage treatment process; Hospitals with convertible wards also adopt pre-secondary enhanced sewage treatment process.