| Hospital sewage discharge standards: |
| 1 General |
1.1 To implement the “prevention-oriented†health work policy and the “Environmental Protection Law of the People's Republic of China (Trial)â€. This standard is specially formulated to prevent hospitals from emitting pollutants with pathogens that pollute the environment and endanger human health.
1.2 This standard applies to general hospitals at or above the county level, as well as specialist hospitals, nursing homes, and other relevant medical and health institutions (hereinafter referred to as hospitals) for intestinal infectious diseases and tuberculosis.
1.3 Newly built, expanded or rebuilt hospitals must design, construct and use the sewage treatment facilities at the same time as the main works in accordance with the provisions of this standard.
Existing hospitals should actively take effective measures to meet the requirements of this standard within a time limit.
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| 2 emission standards |
2.1 After treatment and disinfection of hospital sewage, the following standards should be met:
1. Sampling 500ML for three consecutive tests, and not detecting intestinal pathogens and tubercle bacilli.
Second, the total number of coliform bacteria should not exceed 500 per liter.
2.2 When using chlorination method, the contact time and residual chlorine content in the effluent of the contact tank shall meet the requirements of the following table:
Contact time and total residual chlorine
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| Hospital sewage category | Contact time, h | Total residual chlorine: mg/L | General hospital sewage and
Intestinal pathogen-containing sewage
| Not less than 1 | 4-5 | | Tuberculosis containing sewage | Not less than 1.5 | 6-8 |
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2.3 The sludge in the sewage treatment structure must be treated in a harmless manner, and the sludge discharge should meet the following standards:
First, the mortality of locust eggs is greater than 95%;
Second, the fecal coliform value is not less than 10-2;
3. For every 10G sludge (in the original sample), intestinal pathogenic bacteria and tubercle bacilli should not be detected.
2.4 When the sludge is treated harmlessly by the high temperature composting method, the temperature of the compost must be greater than 50* and should last for more than 5 days.
2.5 Hospitals without upper and lower sewer equipment or centralized sewage treatment structures shall be disinfected or otherwise harmlessly treated for infectious feces.
2.6 After treatment and disinfection of hospital sewage, the content of pollutants and harmful substances contained in the hospital shall comply with the requirements of the current relevant standards.
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| 3 Design requirements |
3.1 The hospital shall set up centralized sewage treatment structures. It is strictly forbidden to use sewage wells and seepage pits to discharge sewage.
3.2 The sewage in the living quarters of the hospital staff and administrative areas shall be diverted from the sewage in the ward.
3.3 The location of the hospital sewage treatment structure should be located on the upwind side of the local summer wind in the hospital building, and a green protective zone should be set up between the surrounding buildings.
3.4 The design of the treatment structure shall meet the following requirements:
1. Take anti-corrosion and anti-leakage measures;
Second, to ensure the treatment effect, safe and durable;
Third, easy to operate, easy to disinfect and clear, is conducive to the labor protection of operators.
3.5 The design of the chlorination disinfection system should meet the following requirements:
1. Emergency facilities in case of failure;
Second, when using liquid chlorine, there should be safety facilities. It is strictly forbidden to directly add chlorine gas to the sewage by using a steel cylinder. |
| 4 Management requirements |
4.1 The hospital must strictly manage sewage and sludge. It is not allowed to be discharged or cleaned without being disinfected or harmlessly used as agricultural fertilizer.
4.2 The hospital sewage treatment facilities should be regularly maintained to ensure normal operation. When the treatment equipment fails, appropriate measures must be taken to ensure that the sewage can still be discharged according to the standard requirements.
4.3 Hospital sewage treatment facilities shall be equipped with management personnel and inspection personnel.
4.4 Hospital sewage monitoring should meet the following requirements:
1. Residual chlorine: continuous disinfection, monitoring at least twice a day, intermittent disinfection, monitoring before each discharge;
Second, the total number of coliforms: at least once every two weeks;
3. Infectious diseases and tuberculosis hospitals should increase the number of pathogenic bacteria as needed.
4.5 The health and epidemic prevention departments at all levels shall, in response to the treatment of sewage and sludge in hospitals under their jurisdiction, carry out regular sanitary supervision, and the annual random inspection shall not be less than two times.
4.6 Inspection methods for sewage and sludge shall comply with the provisions of Appendix 1.
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