The correct way to treat sewage from healthcare facilities is to strictly disinfect it in accordance with national regulations, and discharge it into the sewage system only after it meets the national discharge standards.
The sewage from medical and health institutions usually contains a variety of harmful substances, such as highly infectious bacteria, medical chemicals and a large number of pollutants, etc., posing a great threat to the environment and human health. Therefore, in order to safeguard public **** health and environmental safety, well-equipped and compliant healthcare facilities should be equipped with a standard wastewater treatment system.
I. Physical Treatment
Physical treatment is the removal of solids and particles from sewage by physical methods such as screens, settling tanks, grids, clarifiers, filtration and adsorption. Physical treatment is one of the necessary means of pre-treatment of sewage.
It should be noted that due to the excessive amount of pharmaceutical residues, heavy metals, and other toxic substances in the sewage produced by health care facilities, physical treatment alone may not be sufficient, and therefore a combination of chemical and biological treatment is required.
Two, chemical treatment
Chemical treatment that is, through chemical methods, the most commonly used is to add some chemicals to destroy or precipitate the harmful substances in the sewage. This treatment is suitable for high concentrations of toxic substances in sewage treatment.
Chemical treatment can take the coagulation and precipitation, oxidation reduction and other methods of treatment. However, because chemical treatment involves the use of some strong acid and alkali and harmful chemicals, if not operated properly, it will cause secondary pollution to the environment.
Three, biological treatment
Biological treatment is the use of natural microorganisms to degrade and remove trace organic matter in sewage. It usually includes activated sludge method, biofilm method, artificial wetland and so on. Biological treatment is considered to be environmentally friendly and energy efficient, and is one of the more mature treatment methods.
However, in hospital wastewater treatment, special attention needs to be paid to the effects on microorganisms of heavy metals and chemicals, etc., present in the wastewater, as well as to the monitoring of substances such as nitrate and ammonia-nitrogen during biological treatment.
In short, for sewage generated by health care organizations, it is necessary to establish a comprehensive sewage treatment system to ensure public **** health and environmental safety.
In the process of sewage treatment, it is necessary to choose the appropriate treatment method according to the source of sewage, the type of hazardous substances and other factors, and dynamically adjust the sewage treatment program. At the same time, it should also strengthen the management and supervision to ensure quality control of each link to reduce the occurrence of secondary pollution.