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    Water and Wastewater / water testing
    Current location: home page -Water and wastewater
  • surface water
  • Drinking Water
  • waste water
  • Secondary water supply
  • Farmland irrigation water

    surface water It is the general name of four kinds of water bodies: River, glacier, lake and swamp. It is one of the important sources of water for human life. However, with the intensification of human economic activities, the development of industrial production and the prosperity of social economy, a large number of industrial wastewater and urban domestic sewage are discharged into the water body while a large amount of energy is consumed. The surface water pollution is becoming increasingly serious, which increasingly threatens the safety and health of human beings.

     Surface water detection

    Surface water pollution It mainly comes from industrial wastewater and domestic sewage. The composition of wastewater is complex, containing various organic pollutants and inorganic pollutants, as well as a large number of pathogens in hospital sewage. Different water bodies have different pollution characteristics. River pollution changes with runoff, and pollutants diffuse rapidly; pollutants in lakes (reservoirs) will stay and accumulate for a long time, which will cause water quality changes, mainly due to the eutrophication of water body caused by plant nutrients such as phosphorus and nitrogen; marine pollution sources are numerous and complex, with strong sustainability and wide range. Besides navigation boats and offshore oil wells, industrial waste water discharged from coastal and inland areas is also involved And urban sewage, eventually into the ocean, so marine damage to living things, damage to marine resources, has become an important aspect of water environmental protection. Protecting surface water resources and preventing surface water pollution are sacred and obligatory responsibilities of all mankind.

    Relevant standards

    In order to prevent and control water pollution, protect surface water quality, protect human health and maintain a good ecosystem, the state has formulated the environmental quality standard for surface water (GB 3838-2002), which stipulates the quality standard for surface water environment.

    Test items

    Water temperature, dissolved oxygen, volatile phenol, total nitrogen, animal and vegetable oil, petroleum, chemical oxygen demand, ammonia nitrogen, mercury, biochemical oxygen demand, total hardness, pH, copper, zinc, lead, cadmium, permanganate index, total phosphorus, fluoride, total arsenic, hexavalent chromium, cyanide, anionic surfactant, sulfide, fecal coliform, etc.

    On July 1, 2007, the National Standards Commission and the Ministry of Health jointly issued the mandatory national standards for drinking water quality (GB 5749-2006) and 13 national standards for sanitary inspection of drinking water. On October 1, 2009, drinking natural mineral water (GB8537-2008) was officially implemented. This is the first time in 21 years that the national standard for drinking water was revised in 1985.

     Detection of drinking water

    Xi'an Ruipu detection can provide professional drinking water quality testing service in accordance with the latest standard of "sanitary standard for drinking water" (GB 5749-2006). If you have testing requirements on drinking water, please contact us.

    Major changes in the new standard

    The number of water quality indicators increased from 35 to 106

    (2) microbial indicators increased from 2 to 6, including Escherichia coli, thermotolerant coliform, Giardia and Cryptosporidium, and revised the total coliform group;

    The number of disinfectants for drinking water increased from 1 to 4, adding monochloramine, ozone and chlorine dioxide;

    The toxicity indexes of inorganic compounds increased from 10 to 21, including bromate, chlorite, chlorate, antimony, barium, beryllium, boron, molybdenum, nickel, thallium and cyanogen chloride, and revised arsenic, cadmium, lead and nitrate;

    Among the toxicological indexes, organic compounds increased from 5 to 53

    Formaldehyde, trihalomethane, dichloromethane, 1,2-dichloroethane, 1,1,1-trichloroethane, tribromomethane, dichlorodibromomethane, dichloromonochloromethane, epichlorohydrin, vinyl chloride, 1,1-dichloroethylene, 1,2-dichloroethylene, trichloroethylene, tetrachloroethylene, hexachlorobutadiene, dichloroacetic acid, trichloroacetic acid, Trichloroacetaldehyde, benzene, toluene, xylene, ethylbenzene, styrene, 2,4, 6-trichlorophenol, chlorobenzene, 1,2-dichlorobenzene, 1,4-dichlorobenzene, Trichlorobenzene, di (2-ethylhexyl) phthalate, acrylamide, microcystin LR, fenazone, chlorothalonil, deltamethrin, dimethoate, 2,4-dichlorobenzene, Trichlorobenzene, chloramphenicol, chloramphenicol, 2,4-dichlorobenzene, 1,2-dichlorobenzene, 1,4-dichlorobenzene, Trichlorobenzene, 1,4-dichlorobenzene, Trichlorobenzene, 4-D, heptachlor, hexachlorobenzene, lindane, malathion, parathion, methyl parathion, pentachlorophenol, atrazine, carbofuran, chlorpyrifos, dichlorvos and glyphosate were revised;

    Sensory properties and general physical and chemical indexes increased from 15 to 20

    Oxygen consumption, ammonia nitrogen, sulfide, sodium, aluminum; turbidity was revised;

    The total alpha radioactivity was revised in the radioactivity index.

    industrial waste water It is the waste water discharged from the process of production, and it is an important cause of environmental pollution, especially water pollution. Therefore, industrial wastewater must reach a certain standard before discharge or into the sewage treatment plant for treatment.

     Waste water detection

    Relevant standards

    Industrial wastewater discharge standards are also formulated according to the industry

    ■ discharge standard of water pollutants for paper industry (GB3544-2008)

    ■ discharge standard for oily wastewater from offshore oil development industry (gb4914-2008)

    ■ discharge standard of water pollutants for textile dyeing and finishing industry (GB4287-92)

    ■ discharge standard of water pollutants for meat processing industry (gb13457-92)

    ■ discharge standard of water pollutants for synthetic ammonia industry (gb13458-2001)

    ■ discharge standard of water pollutants for iron and steel industry (gb13456-92)

    ■ discharge standard of water pollutants for space propellant (GB 14374-93)

    ■ discharge standard of water pollutants for ordnance industry (gb14470.1-14470.3-2002)

    ■ discharge standard of water pollutants for phosphate fertilizer industry (gb15580-95)

    ■ discharge standard of water pollutants for caustic soda and PVC industry (gb15581-95)

    ■ discharge standard of water pollutants for saponin industry (GB 20425-2006)

    ■ emission standard of pollutants for coal industry (GB 20426-2006)

    Industrial wastewater monitoring service project

    Category I pollutants

    Serial number Contaminants Maximum allowable emission concentration
    one Total mercury zero point zero five
    two Alkyl mercury No detection
    three Total cadmium zero point one
    four General brand one point five
    five Hexavalent chromium zero point five
    six Total arsenic zero point five
    seven Total lead one
    eight Total nickel one
    nine Benzo (a) pyrene 0.000 03
    ten Total beryllium zero point zero zero five
    eleven Total silver zero point five
    twelve Total alpha radioactivity 1 Bq/L
    thirteen Total beta radioactivity 10 Bq/L


    Category II pollutants

    PH, chroma, suspended solids, BOD5, CODCr, petroleum, animal and vegetable oil, volatile phenol, total cyanide, sulfide, ammonia nitrogen, fluoride, anionic surfactant, copper, zinc, fecal coliform, etc.

    Drinking Water In order to ensure the safety of drinking water, the National Health Department has issued strict regulations to strengthen the monitoring and management of drinking water quality. Various laws and regulations have clear requirements on water quality sampling point location, inspection items and monitoring frequency of various water supply facilities, especially secondary water supply facilities.

     Secondary water supply detection

    Inspection requirements for secondary water supply

    The state health department clearly stipulates that the responsible unit of water supply shall regularly inspect the water quality and register the inspection results, and the water quality inspection shall be undertaken by a third party with inspection qualification.

    one The sampling points are set at the raw water inlet, equipment outlet and terminal water.

    two Water quality inspection items:

    (1) Required items: chroma, pH, turbidity, odor and taste, visible substances, sulfate, chloride, ammonia nitrogen, nitrite nitrogen, nitrate nitrogen, volatile phenols, oxygen consumption, total hardness, iron, manganese, copper, lead, total bacterial colony, total coliform, heat-resistant coliform, Escherichia coli.

    (2) Optional test items: if necessary, relevant test items and disinfection by-products can be added according to the type of water tank, disinfection method and other factors.

    3. Monitoring frequency: once a year.

    1. Farmland irrigation water

    According to the use of irrigation water, Agricultural irrigation water There are two types of water quality requirements: A class It refers to the irrigation area where industrial wastewater or urban sewage is the main source of agricultural water and is used for a long time. Irrigation amount: paddy field 800 m3 / mu a year, dry land 300 m3 / mu a year. Class II It refers to the irrigation area where industrial wastewater or urban sewage is used as the supplementary water source of agricultural water, and mixed irrigation with sewage is implemented. Its dosage is not more than half of the first class.

     Farmland irrigation water

    2. Sources of irrigation water for farmland

    Surface water, ground water, treated urban sewage and industrial wastewater with similar quality to urban sewage are used for farmland irrigation in China.

    3. Water quality standard limits for farmland irrigation

    Farmland irrigation water quality standard mg / L
    one Biochemical oxygen demand (BOD5) eighty one hundred and fifty eighty
    two Chemical oxygen demand (CODcr) two hundred three hundred one hundred and fifty
    three Suspended matter one hundred and fifty two hundred one hundred
    four Anionic surfactant (LAS) five eight five
    five Kjeldahl nitrogen twelve thirty thirty
    six Total phosphorus (as P) five ten ten
    seven Water temperature, ℃ thirty-five
    eight PH value 5.5~8.5
    nine Total salt content Areas with conditions of 1000 (non saline land area) and 2000 (saline alkali land area) can be appropriately relaxed
    ten chloride two hundred and fifty
    eleven sulfide one
    twelve Total mercury zero point zero zero one
    thirteen Total cadmium zero point zero zero five
    fourteen Total arsenic zero point zero five zero point one zero point zero five
    fifteen Chromium (VI) zero point one
    sixteen Total lead zero point one
    seventeen Total copper one
    eighteen Total zinc two
    nineteen Total selenium zero point zero two
    twenty fluoride 2.0 (high fluoride area) 3.0 (general area)
    twenty-one cyanide zero point five
    twenty-two Petroleum five ten one
    twenty-three Volatile phenol one
    twenty-four benzene two point five
    twenty-five Trichloroacetaldehyde one zero point five zero point five
    twenty-six Acrolein zero point five
    twenty-seven boron 1.0 (boron sensitive crops, such as potatoes, bamboo shoots, leeks, onions, oranges, etc.)
    2.0 (crops with strong boron tolerance, such as wheat, corn, green pepper, Chinese cabbage, green onion, etc.)
    3.0 (crops with strong boron tolerance, such as rice, radish, rape, cabbage, etc.)
    twenty-eight Number of fecal coliforms, number / L ten thousand
    twenty-nine Number of Ascaris eggs, eggs / L two
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