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Chinese secondary water supply facilities, sanitation norms
2015-05-08 14:09  点击数:
1. Scope
 
This specification defines the hygiene requirements and water quality testing methods building secondary water supply facilities.
This specification applies to building secondary water supply facilities in the unit design, production, processing, construction, use and management.
2, the reference standard
The following standards contain provisions which, through reference in this standard, constitute provisions of the standard. At the time of publication, the editions indicated were valid. All standards will be revised, using the standard parties should explore the possibility of using the latest version of the following standards.
GB5749-85
GB5750-85
Drinking water health standards
Drinking water standard test method
3, the definition of
This standard uses the following definitions.
3.1 secondary water supply facilities (hereinafter referred to as facilities): Drinking water after storage, handling, transportation and other ways to ensure normal supply of equipment and pipelines.
3.2 storage device: high, medium, low tanks and reservoirs.
3.3 Water treatment equipment: filtration, softening, purification, mineralization, disinfection and other equipment.
3.4 Water pipeline: supply and transport of drinking water pipelines, valves, hydrants.
4 health facilities requirements
4.1 surrounding facilities should be kept clean and tidy environment, there should be good drainage conditions, water supply facilities should be operating normally.
4.2 facilities and drinking water contact surfaces must be guaranteed a good appearance, smooth, and do not affect the quality of drinking water.
4.3 sensory properties of residents drinking water supplied by the facility should not adversely affect people, should not contain hazardous substances harmful to human health, does not cause the occurrence of intestinal infectious disease or epidemic.
5, facility design hygiene requirements
5.1 Design of tanks or cisterns: drinking water tanks or cisterns should be dedicated, can not leak, water tank set up in the building from the roof top and should be more than 80cm, the tank should have the appropriate ventilation duct and cover the hole location and size of the water tank to meet the needs of internal cleansing and disinfection work, into the hole or the tank inlet should cover (or gate), and higher than 5cm above the tank surface, and a locking device, both inside and outside the tank shall be provided with a ladder. A sense of the tank must be installed on drainage conditions chassis, vent pipes should be located at the bottom of the tank, the overflow tube and vent pipe shall be in direct communication with the water pipes, water tanks materials and wall paint should be non-toxic, does not affect the water View trait. Design of the tank volume shall not exceed the amount of water used 48h.
5.2 facilities may not be in direct communication with the municipal water supply pipeline, pressure tank must not set under special circumstances communicated. Facilities pipeline must not be connected with non-drinking water pipes, such as when you must connect, anti-pollution measures to be taken. Facilities and pipelines must not defecate port (slot), the State Bureau of Technical Supervision direct urinal 1997 1998 approved a 11 a 11 a 12 a 01 implementation
GB17051 a 1997 connection, must use the flush water tank or flush valve with air cut off.
5.3 disinfection facilities shall be installed position, conditional units should be equipped with disinfection facilities.
Filtration, softening 5.4 based sauce used in the purification, disinfection equipment, anti-corrosion coatings, there must be above the provincial level (including provincial) health department issued a 'product safety evaluation report. "
Within the reservoir around 5.5 lom not have seepage pits and piled garbage pollution. Around the tank should not have sewer lines and contaminants within 2m.
6, preventive health supervision
The health sector must participate in the design review of secondary water supply facilities, water quality testing and final acceptance (according to the all-items index specification), before being put into use after passing water hygiene standard facilities.
7.1 Water Quality Index
7.1.1 must be measured: color, turbidity, odor and visible matter, pH, coliform, total bacteria, chlorine.
7.1.2 election test items: total hardness, chloride, nitrate nitrogen, volatile phenol, cyanide, arsenic, hexavalent chromium, iron, manganese, lead, UV intensity.
7.1.3 increase test items: ammonia, nitrite nitrogen, oxygen consumption.
7.2 water hygiene standards
7.2.1 must be measured, a standard election test project, see GB5749, UV intensity greater than 70pW / cm '.
7.2.2 Project Standards adopted by measuring the maximum allowable increase in values ​​in Table 1
Maximum allowable value added items .mg / L
Ammonia 0.1
Nitrite 0.02
Oxygen Consumption 1.0
8, sanitation requirements for everyday use
Daily Operation 8.1 Facilities Management is responsible for facility maintenance, cleaning and disinfection.
8.2 Management Unit for sanitation facilities management facilities must develop and implement health system managers to conduct a health check and health knowledge training each year, qualified posts.
8.3 year facility management unit should conduct a thorough cleansing and disinfection, and water quality testing, to discover and eliminate pollution risks, to ensure the health and safety of drinking water.
8.4 Water Supply accident occurred, facilities management unit must immediately take emergency measures to ensure that residents water for daily life, at the same time report to the local health department and the health department to assist the investigation process.
9, water quality testing methods
Water quality testing methods specified in 9.1 of the specification, see GB5750,
9.2 UV intensity measurement method, see Appendix A,
GB17051 to 1997
Appendix A
(Normative)
T UV intensity measurement method
The use of physical methods, the use of a central wavelength of 2537 people of UV intensity meter. In the measurement must be calibrated strength meter national metrology department within the validity period, the radiation dose was measured at the center of the vertical distance tube. In practice, the actual distance of the object should be sterilized with radiation dose calculations lamp use biological methods, carrier quantitative test, 100 ^ -101 isolates / tablet. After the ultraviolet light is turned on 5min, contamination with 8 slices.
Irradiation four different times, take duplicate samples, in the eluent (eluent 1% Tween 80, 1% peptone saline). Rapping 80, 37'C, 48h for viable count, to calculate the kill rate. Criteria: greater than 99.9% kill rate.
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