GB 18466-2005 Discharge Standard of Water Pollutants for Medical Organization
1 Scope
This standard specifies pollutant control item and discharge control limit, treating process and sterilizing requirement, sampling and monitoring of waste gas and sludge discharged from medical organization wastewater and water disposal plant, and implementation and supervision of the standard, etc.
This Standard is applicable to control of medical organization wastewater and water disposal plant sludge/waste gas, environmental impact assessment of medical organization construction project, and environmental protections (facility) of design, completion acceptance and post-acceptance discharge management. Where the wastewater from office service area, non-medical living area and so on of medical organizations are collected in combination with the one from inpatient area, the integrated wastewater discharge shall be applied this Standard. The wastewater discharge of the non-inpatient-area living area in the medical organization equipped with separated wastewater collecting system shall comply with the relevant requirements of GB 8978.
2 Normative References
The following normative documents and the analysis method standard and specifications listed in Table 5 and Table 6, contain provisions which, through reference in this text, constitute provisions of this Standard, and have same effect to this Standard. If the normative documents and specifications referred to are revised, the latest editions hereof apply.
GB 8978 Integrated Wastewater Discharge Standard
GB 3838 Environmental Quality Standards for Surface Water
GB 3097 Seawater Quality Standards
GB 16297 Integrated Emission Standard of Air Pollutants
HJ/T 55 Technical Guidelines for Fugitive Emission Monitoring of Air Pollutants
HJ/T 91 Technical Specifications Requirements for Monitoring of Surface Water and Waste Water
3 Term and Definition
For the purposes of this Standard, the following terms and definitions apply.
3.1 Medical organization
It refers to hospital, health center, sanatorium, outpatient clinic, dispensary, first-aid station and so on undertaking disease diagnosis and treatment.
3.2 Medical organization wastewater
It refers to diagnosis/treat, living and excrement wastewater discharged from outpatient clinic, ward, operating room, test room, pathology dissecting room, X-ray room, laundry room, mortuary, etc. of medical organizations. Other wastewater from medical organization, if discharged in combination with the wastewater above, shall also be regarded as medical organization wastewater.
3.3 Sludge
It refers to sediment, sedimentation sludge and septic tank sludge produced in wastewater disposal process of medical organizations.
3.4 Waste gas
It refers to harmful gases produced in wastewater disposal process of medical organizations.
4 Technical Contents
4.1 Requirements on Wastewater Discharge
4.1.1 Wastewater discharge from infectious disease and tuberculosis medical organizations shall all subjected to the requirements of Table 1.
4.1.2 Integrated medical organization and other medical organizations on the county level and above or with over 20 beds shall comply with the requirements of Table 2 in wastewater discharge. For wastewater directly or indirectly discharged areal surface waters and sea areas, the discharge standard shall apply; for sewerage wastewater discharged to the terminal equipped with secondary urban wastewater disposal plant, the pretreatment standard shall apply.
Table 1 Discharge Limits of Water Pollutants Discharged by Infectious Disease and Tuberculosis Medical Organizations (Daily Mean)
No. Control item Standard value
1 Coliform bacteria count /(MPN/L) 100
2 Pathogenic entero becteria Not detected
3 Enteric virus Not detected
4 Tubercle bacillus Not detected
5 PH 6~9
6 Chemical oxygen demand (COD)
Concentration /(mg/L)
Maximum allowable discharge load /[g/(bed·d)]
60
60
7 Biochemical oxygen demand (BOD)
Concentration /(mg/L)
Maximum allowable discharge load /[g/(bed·d)]
20
20
8 Suspended substance (SS)
Concentration /(mg/L)
Maximum allowable discharge load [g/(bed·d)]
20
20
9 Ammonia /(mg/L) 15
10 Animal/plant oil (mg/L) 5
11 Petroleum /(mg/L) 5
12 Anionic surface active agent /(mg/L) 5
13 Chrominance /(dilution ratio) 30
14 Volatile phenol /(mg/L) 0.5
15 Total cyanide /(mg/L) 0.5
16 Total mercury /(mg/L) 0.05
17 Total cadmium/(mg/L) 0.1
18 Total chromium/(mg/L) 1.5
19 Hexavalent chrome/(mg/L) 0.5
20 Total arsenic/(mg/L) 0.5
21 Total lead/(mg/L) 1.0
22 Total silver/(mg/L) 0.5
23 Total α /(Bq/L) 1
24 Total β /(Bq/L) 10
25 Total residual chlorine 1),2) /(mg/L) 0.5
Note: 1) Adopting sterilization technology with chlorine sterilizer, the control requirement is as: the contact duration in the sterilization contact tank is larger than or equal to 1.5h, and the total residual chlorine of the contact tank outlet is 6.5~10mg/L.
2) The requirements on total residual chlorine does not apply to other sterilizer adopted.
Table 2 Discharge Limits of Water Pollutants Discharged by General Medical Organization and Other Medical Organization (Daily Mean)
No. Control item Discharge standard Pre-disposal standard
1 Coliform bacteria count /(MPN/L) 500 5000
2 Pathogenic entero becteria Not detected —
3 Enteric virus Not detected —
4 pH 6~9 6~9
5 Chemical oxygen demand (COD)
Concentration /(mg/L)
Maximum allowable discharge load /[g/(bed·d)]
60
60
250
250
6 Biochemical oxygen demand (BOD)
Concentration /(mg/L)
Maximum allowable discharge load /[g/(bed·d)]
20
20
100
100
7 Suspended substance (SS)
Concentration /(mg/L)
Maximum allowable discharge load /[g/(bed·d)]
20
20
60
60
8 Ammonia /(mg/L) 15 —
9 Animal/plant oil (mg/L) 5 20
10 Petroleum /(mg/L) 5 20
11 Anionic surface active agent /(mg/L) 5 10
12 Chrominance /(dilution ratio) 30 —
13 Volatile phenol /(mg/L) 0.5 1.0
14 Total cyanide /(mg/L) 0.5 0.5
15 Total mercury (mg/L) 0.05 0.05
16 Total cadmium/(mg/L) 0.1 0.1
17 Total chromium/(mg/L) 1.5 1.5
18 Hexavalent chrome/(mg/L) 0.5 0.5
19 Total arsenic/(mg/L) 0.5 0.5
20 Total lead/(mg/L) 1.0 1.0
21 Total silver/(mg/L) 0.5 0.5
22 Total α /(Bq/L) 1 1
23 Total β /(Bq/L) 10 10
24 Total residual chlorine 1), 2) /(mg/L) 0.5 —
Note: 1) Adopting sterilization technology with chlorine sterilizer, the control requirement is as:
Discharge standard: the contact duration in the sterilization contact tank is larger than or equal to 1h, and the total residual chlorine of the contact tank outlet is 3~10mg/L.
Pre-disposal standard: the contact duration in the sterilization contact tank is larger than or equal to 1h, and the total residual chlorine of the contact tank outlet is 2~8mg/L.
2) The requirements on total residual chlorine do not apply to other sterilizer adopted.
4.1.3 Integrated medical organization and other medical organizations below the county level or with less 20 beds may discharge medical organization wastewater after it is sterilized.
4.1.4 Medical organization wastewater must not be discharged into categories I and II water area (GB 3838), drinking water, protected zone and swimming zone in category III (GB 3838), and categories I and II sea areas (GB 3097).
4.1.5 In general medical organization equipped with infectious disease ward, the wastewater from infectio
1 Scope
2 Normative References
3 Term and Definition
4 Technical Contents
5 Requirements on Treatment Process and Sterilizing
6 Sampling and Monitoring
7 Implementation and Supervision of the Standard
Appendix A (Normative) Testing Methods for Faecal Oliform Bacteria in Medical Organization Wastewater and Sludge
Appendix B (Normative) Testing Method for Salmonella in Sewage and Sludge of Medical Organization
Appendix C (Normative) Testing method for Shigella in Sewage and Sludge of Medical organization
Appendix D (Normative) Testing method for Roundworm Eggs in Sludge of Medical organization
Appendix E (Normative) Testing method for Mycobacterium Tuberculosis in Sewage and Sludge of Medical organization
Appendix F (Normative) Unit Discharge Load Calculation Method for Sewage Pollutants (COD, BOD, SS) Of Medical organization
GB 18466-2005 Discharge Standard of Water Pollutants for Medical Organization
1 Scope
This standard specifies pollutant control item and discharge control limit, treating process and sterilizing requirement, sampling and monitoring of waste gas and sludge discharged from medical organization wastewater and water disposal plant, and implementation and supervision of the standard, etc.
This Standard is applicable to control of medical organization wastewater and water disposal plant sludge/waste gas, environmental impact assessment of medical organization construction project, and environmental protections (facility) of design, completion acceptance and post-acceptance discharge management. Where the wastewater from office service area, non-medical living area and so on of medical organizations are collected in combination with the one from inpatient area, the integrated wastewater discharge shall be applied this Standard. The wastewater discharge of the non-inpatient-area living area in the medical organization equipped with separated wastewater collecting system shall comply with the relevant requirements of GB 8978.
2 Normative References
The following normative documents and the analysis method standard and specifications listed in Table 5 and Table 6, contain provisions which, through reference in this text, constitute provisions of this Standard, and have same effect to this Standard. If the normative documents and specifications referred to are revised, the latest editions hereof apply.
GB 8978 Integrated Wastewater Discharge Standard
GB 3838 Environmental Quality Standards for Surface Water
GB 3097 Seawater Quality Standards
GB 16297 Integrated Emission Standard of Air Pollutants
HJ/T 55 Technical Guidelines for Fugitive Emission Monitoring of Air Pollutants
HJ/T 91 Technical Specifications Requirements for Monitoring of Surface Water and Waste Water
3 Term and Definition
For the purposes of this Standard, the following terms and definitions apply.
3.1 Medical organization
It refers to hospital, health center, sanatorium, outpatient clinic, dispensary, first-aid station and so on undertaking disease diagnosis and treatment.
3.2 Medical organization wastewater
It refers to diagnosis/treat, living and excrement wastewater discharged from outpatient clinic, ward, operating room, test room, pathology dissecting room, X-ray room, laundry room, mortuary, etc. of medical organizations. Other wastewater from medical organization, if discharged in combination with the wastewater above, shall also be regarded as medical organization wastewater.
3.3 Sludge
It refers to sediment, sedimentation sludge and septic tank sludge produced in wastewater disposal process of medical organizations.
3.4 Waste gas
It refers to harmful gases produced in wastewater disposal process of medical organizations.
4 Technical Contents
4.1 Requirements on Wastewater Discharge
4.1.1 Wastewater discharge from infectious disease and tuberculosis medical organizations shall all subjected to the requirements of Table 1.
4.1.2 Integrated medical organization and other medical organizations on the county level and above or with over 20 beds shall comply with the requirements of Table 2 in wastewater discharge. For wastewater directly or indirectly discharged areal surface waters and sea areas, the discharge standard shall apply; for sewerage wastewater discharged to the terminal equipped with secondary urban wastewater disposal plant, the pretreatment standard shall apply.
Table 1 Discharge Limits of Water Pollutants Discharged by Infectious Disease and Tuberculosis Medical Organizations (Daily Mean)
No. Control item Standard value
1 Coliform bacteria count /(MPN/L) 100
2 Pathogenic entero becteria Not detected
3 Enteric virus Not detected
4 Tubercle bacillus Not detected
5 PH 6~9
6 Chemical oxygen demand (COD)
Concentration /(mg/L)
Maximum allowable discharge load /[g/(bed·d)]
60
60
7 Biochemical oxygen demand (BOD)
Concentration /(mg/L)
Maximum allowable discharge load /[g/(bed·d)]
20
20
8 Suspended substance (SS)
Concentration /(mg/L)
Maximum allowable discharge load [g/(bed·d)]
20
20
9 Ammonia /(mg/L) 15
10 Animal/plant oil (mg/L) 5
11 Petroleum /(mg/L) 5
12 Anionic surface active agent /(mg/L) 5
13 Chrominance /(dilution ratio) 30
14 Volatile phenol /(mg/L) 0.5
15 Total cyanide /(mg/L) 0.5
16 Total mercury /(mg/L) 0.05
17 Total cadmium/(mg/L) 0.1
18 Total chromium/(mg/L) 1.5
19 Hexavalent chrome/(mg/L) 0.5
20 Total arsenic/(mg/L) 0.5
21 Total lead/(mg/L) 1.0
22 Total silver/(mg/L) 0.5
23 Total α /(Bq/L) 1
24 Total β /(Bq/L) 10
25 Total residual chlorine 1),2) /(mg/L) 0.5
Note: 1) Adopting sterilization technology with chlorine sterilizer, the control requirement is as: the contact duration in the sterilization contact tank is larger than or equal to 1.5h, and the total residual chlorine of the contact tank outlet is 6.5~10mg/L.
2) The requirements on total residual chlorine does not apply to other sterilizer adopted.
Table 2 Discharge Limits of Water Pollutants Discharged by General Medical Organization and Other Medical Organization (Daily Mean)
No. Control item Discharge standard Pre-disposal standard
1 Coliform bacteria count /(MPN/L) 500 5000
2 Pathogenic entero becteria Not detected —
3 Enteric virus Not detected —
4 pH 6~9 6~9
5 Chemical oxygen demand (COD)
Concentration /(mg/L)
Maximum allowable discharge load /[g/(bed·d)]
60
60
250
250
6 Biochemical oxygen demand (BOD)
Concentration /(mg/L)
Maximum allowable discharge load /[g/(bed·d)]
20
20
100
100
7 Suspended substance (SS)
Concentration /(mg/L)
Maximum allowable discharge load /[g/(bed·d)]
20
20
60
60
8 Ammonia /(mg/L) 15 —
9 Animal/plant oil (mg/L) 5 20
10 Petroleum /(mg/L) 5 20
11 Anionic surface active agent /(mg/L) 5 10
12 Chrominance /(dilution ratio) 30 —
13 Volatile phenol /(mg/L) 0.5 1.0
14 Total cyanide /(mg/L) 0.5 0.5
15 Total mercury (mg/L) 0.05 0.05
16 Total cadmium/(mg/L) 0.1 0.1
17 Total chromium/(mg/L) 1.5 1.5
18 Hexavalent chrome/(mg/L) 0.5 0.5
19 Total arsenic/(mg/L) 0.5 0.5
20 Total lead/(mg/L) 1.0 1.0
21 Total silver/(mg/L) 0.5 0.5
22 Total α /(Bq/L) 1 1
23 Total β /(Bq/L) 10 10
24 Total residual chlorine 1), 2) /(mg/L) 0.5 —
Note: 1) Adopting sterilization technology with chlorine sterilizer, the control requirement is as:
Discharge standard: the contact duration in the sterilization contact tank is larger than or equal to 1h, and the total residual chlorine of the contact tank outlet is 3~10mg/L.
Pre-disposal standard: the contact duration in the sterilization contact tank is larger than or equal to 1h, and the total residual chlorine of the contact tank outlet is 2~8mg/L.
2) The requirements on total residual chlorine do not apply to other sterilizer adopted.
4.1.3 Integrated medical organization and other medical organizations below the county level or with less 20 beds may discharge medical organization wastewater after it is sterilized.
4.1.4 Medical organization wastewater must not be discharged into categories I and II water area (GB 3838), drinking water, protected zone and swimming zone in category III (GB 3838), and categories I and II sea areas (GB 3097).
4.1.5 In general medical organization equipped with infectious disease ward, the wastewater from infectio
Contents of GB 18466-2005
1 Scope
2 Normative References
3 Term and Definition
4 Technical Contents
5 Requirements on Treatment Process and Sterilizing
6 Sampling and Monitoring
7 Implementation and Supervision of the Standard
Appendix A (Normative) Testing Methods for Faecal Oliform Bacteria in Medical Organization Wastewater and Sludge
Appendix B (Normative) Testing Method for Salmonella in Sewage and Sludge of Medical Organization
Appendix C (Normative) Testing method for Shigella in Sewage and Sludge of Medical organization
Appendix D (Normative) Testing method for Roundworm Eggs in Sludge of Medical organization
Appendix E (Normative) Testing method for Mycobacterium Tuberculosis in Sewage and Sludge of Medical organization
Appendix F (Normative) Unit Discharge Load Calculation Method for Sewage Pollutants (COD, BOD, SS) Of Medical organization
