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Basic dataStandard ID: WS/T 700-2020 (WS/T700-2020)Description (Translated English): (Technical specifications for preventive disinfection in flood-stricken areas) Sector / Industry: Health Industry Standard (Recommended) Classification of Chinese Standard: C50 Word Count Estimation: 14,166 Date of Issue: 2020-07-23 Date of Implementation: 2020-07-23 Regulation (derived from): State-health communication (2020) No. 15 Issuing agency(ies): National Health Commission WS/T 700-2020: (Technical specifications for preventive disinfection in flood-stricken areas)---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.(Technical specifications for preventive disinfection in flood-stricken areas) ICS 11.080 C 50 WS People's Republic of China Health Industry Standard Technical specifications for preventive disinfection in flood-stricken areas Technical regulation for preventive disinfection in flood and waterlogged area 2020-07-23 release 2020-07-23 implementation Issued by the National Health Commission of the People's Republic of China Table of contentsForeword...II 1 Scope...1 2 Normative references...1 3 Terms and definitions...1 4 Principles of preventive disinfection in flood-stricken areas...2 5 Disinfection methods for various disinfection objects...2 6 Disinfection quality control...4 7 Monitoring and evaluation of disinfection effect...4 Appendix A (Normative Appendix) Disinfection of drinking water in flood-stricken areas...6 Appendix B (Normative Appendix) Preventive Disinfection Procedure...8 Appendix C (informative appendix) Work record table format...10ForewordThis standard was drafted in accordance with the rules given in GB/T 1.1-2009. Drafting organizations of this standard. Fujian Provincial Center for Disease Control and Prevention, China Center for Disease Control and Prevention, Environmental and Health Related Product Safety Institute, Hubei Provincial Center for Disease Control and Prevention, Jiangsu Provincial Center for Disease Control and Prevention, Heilongjiang Provincial Center for Disease Control and Prevention, Fujian Provincial Health and Family Planning Supervision Supervision. The main drafters of this standard. Lin Liwang, Zhang Liubo, Ban Haiqun, Xu Yan, Yue Musheng, Lin Ling, Chen Luyao, Chen Zuyi, Chen Jian, Ao Zhixiong. Technical specifications for preventive disinfection in flood-stricken areas1 ScopeThis standard specifies the treatment principles of preventive disinfection in flood-stricken areas, disinfection methods for various disinfection objects, disinfection quality control, and disinfection effects Monitoring and evaluation. This standard is applicable to preventive disinfection and disinfection effect evaluation in flood-stricken areas.2 Normative referencesThe following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this document. For undated references, the latest version (including all amendments) applies to this document. GB 5749 Sanitary Standard for Drinking Water GB/T 5750 Standard Test Method for Drinking Water GB 14934 Food Safety National Standard Sterilized Meal (Drinking) Utensils GB 19193 General rules for disinfection of foci GB 27950 General requirements for hand disinfectants GB 27952 General requirements for surface disinfectants for ordinary objects GB 27953 General requirements for disinfectants in foci GB 37488 Hygienic indicators and limit requirements for public places3 Terms and definitionsThe following terms and definitions apply to this document. 3.1 Flood and waterlogging disaster Flooding or flooding caused by natural factors such as heavy rain, sharp melting snow, storm surges, etc. Disasters caused by poor drainage. 3.2 Flood and waterlogged area The overall area that needs sanitation and disinfection treatment due to the destruction of the original sanitary condition due to flood disaster. 3.3 Trash-cleaning Relying on mechanical methods to remove dirt, that is, to eliminate the dirt, sludge, sludge, The process of removing garbage and animal carcasses. 3.4 Sanitary treatment Measures taken to prevent the occurrence and spread of diseases, including sanitary measures such as cleaning and disinfection. 3.5 Preventive disinfection Disinfection of items and places that may be contaminated by pathogenic microorganisms in flood-stricken areas. 4 Principles of preventive disinfection in flood-stricken areas 4.1 According to the needs of the prevention of infectious diseases, clean and sanitation and preventive disinfection should be carried out in a timely manner to eliminate the impact of floods. The adverse effects of human health. 4.2 Develop an epidemic prevention and disinfection plan based on the disaster situation and the risk of local infectious diseases, and determine the scope and object of disinfection based on the scope of possible contamination by pathogens. 4.3 The disinfection work should be carried out by relevant units and personnel under the guidance of disinfection professionals, and the disinfection effect should be reliable, simple and easy to be selected as far as possible. A disinfection method that is safe for humans and animals and does not seriously pollute the environment. The staff should understand the use methods and precautions of various disinfectants. Make sure to implement disinfection measures. Personnel engaged in on-site cleaning and disinfection should pay attention to personal protection, and prevent irrelevant personnel from entering the disinfection area when performing on-site disinfection. 4.4 Under normal circumstances, the external environment is mainly decontaminated, and the key areas should be disinfected after decontamination. The large amount of garbage generated by cleaning up pollution should be timely Qingyun, dumping in the river is strictly prohibited. Generally, it is not necessary to conduct inspections on the environment, traffic roads, road surfaces, vehicles, tents, etc. outside the disaster area without disinfection indications. Spray disinfection to prevent the occurrence of excessive disinfection. 4.5 Strengthen the disinfection work in key areas, and the resettlement sites, hospitals, schools, kindergartens, bazaars, etc. are closely related to people's life and work. The relevant places are the key areas of environmental sanitation and disinfection work. The indoor environment and surface of objects in key places are disinfected after cleaning, and the air is ventilated The indoor environment and surface of objects in crowded places can be disinfected regularly. The flooded water sources, toilets, and livestock breeding places should also be fully disinfected. 4.6 Protect water sources, pay attention to the safety of drinking water, do a good job in the disinfection of drinking water and water quality monitoring in the disaster-affected areas; do a good job of eating (drinking) utensils, fruits and vegetables Vegetable disinfection and cleaning work. 4.7 Clean up animal carcasses in time and do harmless treatment. 4.8 Remove and dispose of daily garbage and feces in time. Special personnel should be responsible for the temporary toilets and garbage collection points set up, Sanitary management of feces and garbage disinfection, removal and transportation, when necessary, use sanitary insecticides to control the breeding of flies. 4.9 Strengthen the monitoring of diarrhea and fever symptoms in the disaster area. If an epidemic situation is found, the epidemic spot should be disinfected in time. Epidemic spot disinfection according to GB 27953, GB 19193 related requirements are carried out. 4.10 When necessary, the disinfection effect inspection and evaluation shall be carried out in the key areas of disinfection such as the centralized resettlement points of the victims and the centralized water supply. Qualified laboratory personnel will be tested. 4.11 Preventive disinfection can be terminated only after the disaster returns to normalcy or through preventive disinfection to determine the elimination of health effects.5 Disinfection methods for various disinfection objects5.1 Environment 5.1.1 Thoroughly clean the environment indoors and outdoors to improve environmental hygiene. Thorough sanitation treatment of the indoor and outdoor environments that have suffered disasters, It should be cleaned, disinfected, and moved back to eliminate as much as possible the hidden dangers that cause the epidemic. 5.1.2 Available chlorine 500 mg/L chlorine disinfectant can be used on the surfaces, walls and floors of homes, streets, communities, resettlement sites and other places. Or.200 mg/L chlorine dioxide, or 1000 mg/L peroxyacetic acid for spraying and wiping disinfection for 30 minutes; if other disinfectants are used Can refer to GB 27952.Temporary resettlement sites are regularly disinfected 1 to 2 times a day during the opening period; if there is no epidemic situation, there is no need to For spray disinfection of disinfectants, indoor air circulation should be maintained, and natural ventilation should be the main method. Mechanical ventilation can be used in poorly ventilated places. 5.2 Drinking water 5.2.1 Centralized water supply and undamaged water plants shall be implemented in accordance with GB 5749, and the monitoring of source water and peripheral water shall be strengthened. In Hong During the flooding disaster, the water plant should promptly use or increase the use of coagulants and disinfectants in accordance with the changes in the water quality of the source water to ensure the effluent The quality meets the requirements of GB 5749. 5.2.2 The first choice for water purification disinfection equipment at centralized water supply points where conditions permit is the first choice for drinking water disinfection. Temporary centralized water supply facilities and equipment should be Add drinking water disinfectant. When using chlorine-containing disinfectant, after 30 minutes of action, the residual chlorine at the outlet should not be less than 0.3 mg/L. Use two During chlorine oxide treatment, the residual chlorine at the outlet should not be less than 0.1 mg/L. 5.2.3 If tank trucks (such as fire trucks, water trucks for greening projects, sprinklers, etc.) are used for temporary water supply, they should be filled with those that meet the requirements of GB 5749 Water, tank trucks should be cleaned and disinfected before use every day. 5.2.4 Distributed water supply, such as those who directly take water from rivers, rivers, canals, streams, ponds, wells, springs and other water sources, can be based on the water source Use chlorine-containing disinfectants for disinfection. Under the guidance of professionals, refer to the disinfectant instructions to control the amount of disinfectant and contact time. With Body disinfection methods are shown in Appendix A. Water supply to wells contaminated by floods should be stopped immediately, after the water recedes, they should be thoroughly cleaned and disinfected to restore their pre-disaster conditions Water supply can be restored. 5.2.5 Boiling is a simple and effective method of disinfection and can be used where fuel is available. It can kill parasite eggs at the same time as boiling disinfection, all Drinking water should be consumed after boiling. 5.3 Daily necessities After cleaning furniture, sanitary ware, office supplies, etc., rinse, wipe or soak with a chlorine-containing disinfectant of 500 mg/L of available chlorine. 30 min, or use.200 mg/L chlorine dioxide, 1000 mg/L peroxyacetic acid, 1000 mg/L quaternary ammonium salt disinfectant for disinfection treatment, The poisoning time is 15 minutes to 30 minutes. Wipe clean with clean water after disinfection. 5.4 Disinfection of meal (drinking) utensils After cleaning the tableware (drinking) utensils, boiling disinfection is preferred, and the boiling time should be more than 15 minutes. Disinfectants can also be used for immersion disinfection, such as Available chlorine 250 mg/L～500 mg/L chlorine-containing disinfectant is soaked for 30 minutes, and the disinfectant should be rinsed with clean water after soaking. Temporary shelter, Food (drinking) utensils for public use in temporary settlements should be disinfected and cleaned before each use. 5.5 Fruits and vegetables Fresh fruits and vegetables can be used with chlorine disinfectant 100 mg/L～200 mg/L or chlorine dioxide 50 mg/L～100 mg/L for 20 min～ 30 min; or peracetic acid 500 mg/L～1000 mg/L, or washing with acidic oxidation potential water for 10 min; or 10 mg/L ozone water 10 min. After disinfection, rinse with clean water again. 5.6 Hands and skin 5.6.1 After participating in post-disaster environmental cleanup and animal carcass treatment, hands should be disinfected. An effective hand disinfectant or iodophor can be used to rub both hands. 5.6.2 People who have skin redness, swelling or injury caused by prolonged flood immersion should seek medical treatment in time, or use iodophor or other skin disinfectants for smear disinfection. 5.7 Corpse 5.7.1 The fresh animal carcasses removed during environmental clean-up should be buried or cremated as soon as possible. For animal carcasses that have become smelly, available chlorine can be used. 5000 mg/L～10000 mg/L chlorine-containing disinfectant or.2000 mg/L chlorine dioxide disinfectant is sprayed on the corpse and the surrounding environment to remove odor and disinfect, Then it is buried deep or cremated. 5.7.2 The place for burial of corpses shall be designated by the local government and shall not be buried at will. The location should be far away from water sources and residential areas. Choose the downwind direction of densely populated areas. Dig a pit more than 2 m deep, sprinkle bleaching powder or quicklime on the bottom of the pit, put the animal carcasses in the pit, and then dry it. The bleaching powder is sprinkled on the corpse at a rate of 20 g/m2～40 g/m2, one layer of the corpse is layered with bleaching powder, and then covered with soil, buried and compacted. 5.7.3 The corpses of the victims generally do not cause epidemics of infectious diseases or pose a threat to public health, but for decayed and smelly corpses, Spray bleach or other disinfectant and deodorant in the body bag. The corpse is tightly wrapped in a plastic body bag, does not leak peculiar smell, and does not leak out of putrefaction liquid The body should be sent to the cremation site for treatment in time. In the process of transportation and handling, the sanitary principles of preventing the spread of infectious diseases and environmental pollution should be followed. 5.7.4 After the corpse is cleaned up, the place needs to be disinfected, and 1000 mg/L～2000 mg/L effective chlorine disinfectant can be sprayed. Use 30 minutes to 60 minutes. 5.7.5 Vehicles for transporting dead bodies can be sprayed with 1000 mg/L～2000 mg/L effective chlorine disinfectant or other effective disinfectant solutions. Sprinkle for 30 min to 60 min. In case of contamination by a large amount of body fluids, 5000 mg/L～10000 mg/L available chlorine should be used first After the disinfectant is decontaminated, use the pre-treatment. Disinfect vehicles and tools after each use. 5.8 Garbage, excrement 5.8.1 General household garbage does not need to be disinfected, and sanitation management should be done well, and it should be cleaned daily. Garbage spraying containing corrupted items A disinfectant containing 5000 mg/L～10000 mg/L of available chlorine, collected and treated in a harmless manner after 60 min. 5.8.2 The simple toilets dug at a suitable location should be built with fences and top covers to prevent rainwater from overflowing with feces and polluting the environment. The toilets can be fixed Sprinkle 20% bleach emulsion at times to deodorize and disinfect. When the stool reaches 2/3 of the toilet bowl volume, it should be covered with bleaching powder in time, and the surface thickness 2cm, add soil to cover, and build another toilet. 5.8.3 Disperse a small amount of feces in the field, add bleaching powder at 1.10 of the amount of feces, and remove it after 24 hours.6 Disinfection quality control6.1 The disinfection products used should comply with relevant standards and regulations and be within the validity period of the product. 6.2 Disinfectants should be managed by a dedicated person, and the centralized storage, supply, and distribution of disinfectants should be well managed, and corresponding records should be made; The effective content of the stock disinfectant is determined. 6.3 The disinfection work should be carried out in accordance with the procedures specified in Appendix B. The preparation and use of disinfectants should be carried out in accordance with the requirements of the product instructions. And make a record of the preparation of disinfectant, disinfection work and disinfection effect detection. For the record format, please refer to Appendix C.7 Monitoring and evaluation of disinfection effect7.1 Environment and surface disinfection effect 7.1.1 Detection method 7.1.1.1 Sampling before disinfection. soak a sterile cotton swab in a test tube containing 10 ml of 0.03 mol/L phosphate buffered saline (PBS), and After squeezing the wall of the tube until there is no water, smear the surface of the tested object defined by the sterile specification board (the sampling area is 5 cm × 5 cm), horizontally and vertically Go back and forth 8 times, and then rotate the cotton swab to make all sides touch the surface of the object. Aseptically cut the sampling end of the cotton swab into the original In the PBS test tube, vigorously shake and count the live bacteria. 7.1.1.2 Sampling after disinfection. After disinfection to the specified time, take cotton swab smear sampling at similar places near the sampling point before disinfection. Except that the sampling solution (containing the corresponding neutralizer) is used instead of PBS, the other steps and methods are the same as the sampling before disinfection. Samples before and after disinfection for 4 h Send to the laboratory for live bacteria culture and count. 7.1.1.3 When natural bacteria are used as indicators for the evaluation of disinfection effect, the killing rate of natural bacteria in the disinfected objects after disinfection should be greater than or equal to 90%. 7.2 Disinfection effect of drinking water Evaluate in accordance with the relevant regulations of GB 5749. 7.3 Disinfection effect of public daily necessities Evaluation is carried out in accordance with the relevant regulations of GB 37488. 7.4 Disinfection effect of meal (drinking) utensils Evaluation is carried out in accordance with the relevant regulations of GB 14934.Appendix A(Normative appendix) Disinfection of drinking water in flood-stricken areas A.1 Selection of drinking water source A.1.1 After a flood disaster occurs, the original water source sanitation status should be quickly assessed, and the submerged well or water supply structure should be stopped Water supply, after the water recedes, it can continue to supply water after thorough cleaning and disinfection. A.1.2 When the water source of the centralized water supply is damaged or seriously polluted, a new water source should be selected and a new water intake point should be established. Choice of water source And sanitary protection should be carried out in accordance with the requirements of the "Sanitary Code for Centralized Drinking Water Supply Units". A.1.3 If pumped wells or hand-killed wells are used to supply water, the selected wells should be kept clean and sanitary. There are no toilets, livestock pens, or livestock pens within 30 m. For garbage and waste water discharge outlets, wells should be avoided in low-lying land or places with pollution sources. A.2 Treatment and disinfection of drinking water A.2.1 Cylinder (barr......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of WS/T 700-2020_English be delivered?Answer: Upon your order, we will start to translate WS/T 700-2020_English as soon as possible, and keep you informed of the progress. 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