Source hazards
Hospital departments have different functions, facilities and personnel composition, the main departments and facilities that produce sewage are: diagnostic and treatment rooms, laboratories, wards, laundries, X-ray photographic washing and printing, animal rooms, isotope treatment and diagnosis, operating rooms and other drainage; hospital administration and medical personnel discharges of domestic sewage, cafeteria, singles dormitory, family members of the dormitory drainage. Different departments and sections of the sewage generated by the composition and volume of water are different, such as heavy metal wastewater, oily wastewater, printing and washing wastewater, radioactive wastewater and so on. And the sewage produced by hospitals of different natures is also very different. Hospital sewage is more complex than general domestic sewage discharge. Hospital sewage source and composition is complex, containing pathogenic microorganisms, toxic, harmful physical and chemical pollutants and radioactive contamination, etc., with space pollution, acute infection and latent infection and other characteristics, without effective treatment will become an important pathway for the proliferation of epidemics and serious pollution of the environment.
Principles of treatment
1. The principle of whole process control. Hospital sewage generation, treatment, discharge of the whole process of control.
2. Principle of reduction. Strict hospital internal health and safety management system, strict control and separation of sewage and dirt at the source of occurrence, living sewage in hospitals and sewage collected separately from the sick area, i.e., source control, clean sewage diversion. It is strictly prohibited to discharge sewage and dirt from the hospital into the sewers by random disposal.
3. Local treatment principle. In order to prevent pollution and hazards in the hospital sewage conveyance process, in the hospital must be treated locally.
4. Classification guidance principle. According to the nature of the hospital, scale, sewage discharge destination and regional differences in hospital sewage treatment for classification guidance.
5. The principle of standardization and risk control. Comprehensive consideration of general hospitals and infectious disease hospitals to meet the basic requirements of sewage discharge, while strengthening the awareness of risk control, process technology, engineering construction and supervision and management to improve the ability to deal with unexpected events.
6. Principle of ecological safety. Effective removal of toxic and harmful substances in sewage, reduce the production of disinfection by-products in the treatment process and control of excessive residual chlorine in the effluent, to protect the safety of the ecological environment.
Treatment method
Hospital wastewater treatment of aerated biofilter method Hospital wastewater is mainly from the consultation room, wards, laboratories, operating rooms, laundry, administration and canteen, dormitory and other discharges of sewage, the main pollutants are organic pollutants, pathogenic microorganisms and viruses. Hospital wastewater is now discharged only after grating and disinfection, using chlorine dioxide disinfectant, residual chlorine and bacteriological indicators can meet the standards, but the organic matter has not been removed. In order to fully meet the standards, the hospital added aeration biofilter sewage treatment process to treat sewage. Considering that the hospital wastewater treatment plant occupies a limited area and the water contains a certain amount of disinfectant characteristics, decided to take a high load, occupies a small area, the influent organic concentration range of adaptability to the money of the aeration biofilter process.