The hospital sewage treatment plant station under the epidemic needs to pay attention to the following:
A, hospital sewage treatment discharge standards Different hospital sewage, discharge standards are different. In general, hospital sewage discharge standards can be divided into two kinds: infectious disease hospital discharge standards, general general hospital (non-infectious hospital) discharge standards. During the epidemic, hospitals in different places, their discharge standards can also be able to with the local environmental protection bureau requirements are different, there are subtle differences.
Two,Hospital wastewater treatment disinfectant selection Hospital wastewater treatment station often used disinfection methods are: ozone disinfection, chlorine dioxide disinfection, ultraviolet disinfection and so on.
Three, hospital sewage treatment operation focus?
1, aerobic section operation focus?
The maintenance of aerobic section should pay attention to the following indicators:
a, SV30 to maintain 20-30%
b, ph to maintain about 7.5
c, the temperature is controlled at 25-35 degrees Celsius
d, dissolved oxygen for 4mg / L
e, carbon, nitrogen and phosphorus ratio control in 100:5:1
f, in the control of sludge return ratio, if SV30 is lower than 30%, you need to increase the return flow to prevent running sludge; SV30 is higher than 30%, you need to reduce the return flow and increase the sludge shoot.
2, disinfection section operation focus
Infectious disease hospital sewage treatment stations generally use pre-disinfection + secondary treatment + depth treatment + disinfection process of the secondary enhanced sewage treatment process; general hospitals (non-infectious disease hospitals) generally use a strengthened sewage treatment process; hospitals with a convertible sick zone is the same with the pre-secondary enhanced sewage treatment process.