Earth water the total reserves of about 1.39 billion cubic kilometers, of which about 97% of sea salt water, not directly for human use. 2 the amount of fresh water is only 036 million cubic kilometers, and the less than 3% of the earth's total water fresh water, 77.2% exists in the form of glaciers and ice caps in polar and high mountains, also hard for direct human use 22.4% for the groundwater and soil water, two-thirds of the underground water buried in the depths of the earth; Jiang river, lake, etc. The amount of surface water is only about 23 cubic kilometers, accounting for 0.36% of the total fresh water. Therefore, only about 20% of the fresh water is easy to use, and can directly access the river and lake water accounts for only 0.3% of the total freshwater. Visible, available for direct human use fresh water resource is very limited.

1, drink boiled water may also be a health problem?

Ordinary people think boil tap water will be activated after clean drinking water, in fact, boil some bacteria and viruses can only kill the water, the impurities of heavy metal, chemicals and harmful to human body cannot be ruled out. We can use the water quality test pen inspection, it is concluded that the TDS ＆#118alue is still high, the impurities of heavy metal and can prove that the water still exist, these substances containing dozens of pesticide, chlorine, sodium, nitrites, asbestos fiber, arsenic, cadmium, etc; Besides, the boiling water to kill bacteria body (called the pyrogen) are still remain in tap water, so the quality of pure water. Folk wisdom to boil for 10 minutes and then shut down, even boil 2 times, are in fact can't change the fact, so drinking boiled water, basically can avoid most of the diseases caused by bacteria, but not health.

2, why do some water will have a bad smell?

Clean water is odourless, tasteless, colorless, transparent liquid, the contaminated water will be abnormal smell. The stench of water main reasons are:

(1) the animal, plant or microbial breeding in the water and the smell of decay and produce.

(2) the water, decomposition and send out the taste of organic material corruption.

(3) the water dissolved gases such as sulfur dioxide (SO2), hydrogen sulfide (H2S), hydrogen and nitrogen compounds (NH3) smell.

(4) dissolved salt or the smell of the earth.

(5) industrial wastewater discharged into the water contains impurities and the smell.

(6) the smell of chlorine adding water disinfection process.

3, what is the suspended substances in the water?

Water suspended material is granular particles above 1 ~ 4 mm in diam, visible to the naked eye (eye), these particles are mainly consists of silt, clay, protozoa, algae, bacteria and organic polymer materials, often floating in water, make the water turbid phenomenon. These particles is very unstable, can by precipitation and filter to remove, quiet place, kind of inorganic material will precipitate, sand, soil and light particles can float on the surface of the water, suspended's is turbidity (NTU), chroma (SDI), smell (O.T), the major source will change with the seasons, the district.

4, the organic matter in the water is to point to?

The organic matter in the water is mainly refers to the humic acid and poly (carboxylic acid compounds, domestic sewage and industrial pollutants, humic acid is a product of the water biological life activity, poly carboxylic acid compounds are more functional groups of aromatic species in macromolecular weak sex machine acid, accounting for more than 95% of the water soluble organic matter, sewage is mainly human waste and waste, industrial waste water of organic matter in animal and plant fiber, dye, grease, sugar, organic acids, a variety of organic synthesis of industrial products, raw materials, etc., these organic polluted water, and water quality deterioration. Simply say "organic" is a organic compounds, carbon as the main component of the floorboard of the compound, to constitute the animal and plant compounds; "Machine" is no life force of mineral substance.

5 and organic matter in the aquatic what harm?

The organic matter in the water have a common characteristic, that is, must carry on the biological oxidation decomposition, need to consume oxygen dissolved in the water storage, and led to a lack of oxygen to the water. Corruption fermentation will happen at the same time, make the bacterial growth, water quality deterioration. Organic industrial wastewater pollution, still can reduce the quality of the products.

6, what is the total solids in the water, dissolved solids and suspended solid?

Except for dissolved gas in the water all referred to as the solid impurities, while the solids in the water is divided into soluble solids and suspended solids, the sum of the two is known as the total solid water. Solubility solid refers to water after filtration, those who remain dissolved in the water all kinds of inorganic salts, organic matter, etc. Suspended solids are those that does not dissolve in the water the mud sand, clay and organic matter, microorganism lighter suspended material.

7, what is the salt content of water?

Various salts are commonly exist in the form of ions, so the salt content is according to the water the amount of various "cationic" and "anion" combined. The salt in the water and soluble solids is different, because the solubility of solid besides including salt dissolved in water, including organic matter.

8, what is the hardness of water?

Some metal cations in water, the same metal cation together, in the process of water heating, evaporation and concentration, because in the surface layer to form scale and influence conduction, the total concentrations of the metal cation is called the water hardness. General water contained in the metal cation in the majority with calcium, magnesium, manganese, potassium, if the concentration is called hard water in more than 100 parts per million, under 50 PPM, is called a soft water, hard water also have a permanent hard water and hard water area don't temporarily. Hard water often cause a lot of damage to boiler, also has a great influence to human body health. Water hardness is roughly divided into: 0 ~ 17 PPM said soft water, 18 ~ 60 PPM slightly hard, 60 ~ 120 PPM hard, 120 ~ 180 PPM hard water, more than 180 PPM is very hard.

9, what is the PPM mg/litre, PPB micrograms per liter?

Milli g/l and micrograms per liter is certain substances in water or how many units, impurity content in water treatment, water per unit volume or unit weight usually adopt or ml, or mg, and often use substances in the water content in connected g, mg or micrograms. Therefore, according to the water quality situation, commonly used unit mg/l or micrograms per liter. Mg/l means how many mg 1 liter of water containing impurities, due to the weight of 1 liter of water equal to 1000 grams, namely 1000 mg, so 1 mg/l of impurity is equivalent to one over one million of the impurities in water, which is usually used in PPM (parts per milliom). After dealing with the desalting water impurity content is very low, is expressed in micrograms per liter to; 1 mg = 1000 micrograms. 1 micrograms per liter is equivalent to one over one billion of the impurities in water, can also use PPB. Mg/l unit symbols for mg/l, micrograms/l unit symbols of ug/l.

10, what is a TDS (TOTAL DISSOLVED SOLIDS)? The water presence of impurities and how can you know?

Chinese meaning is dissolved in water of total solid content, TDS meter is designed for the meter, we can see the water of inorganic or organic PPM ＆#118alues. But this is just initial inspection, cannot provide perfect information and contents is what? If you need the right composition of inclusions, still will be subject to inspection. Test the water ＆#118alue of total dissolved solids (TDS) or check out the amount of dissolved in water of all kinds of organic matter or inorganic matter, use the unit for PPM or mg/l (mg/l). Its conductivity instrument can measure the water of electrically conductive material, such as suspended solids, heavy metals and conductive ion. How to use? (a) when measuring the water temperature should be maintained at about 25 degrees Celsius, remember, high temperature can make the TDS ＆#118alue increases, affect the correctness. (2) LCD screen shows the numerical ＆#118alue is the TDS, if digital TDS meter display 100 degrees, the representative in the positive ion or negative ion material content in the water for a total of 100 PPM (tolerance is plus or minus 5 PPM), the higher the number, said the material in the water. (3) the average at around 250 parts per million, the Beijing regional water RO pure water can be reduced to 30 parts per million, when numerical more than 30 PPM, it must consider replacement of RO membrane filter or technical personnel, please check. TDS meter is not universal, of course, it also has its blind spots and weaknesses: (a) TDS can only measure the electrically conductive material in water, substances such as bacteria, viruses, but can not be measured. (2) separate dependent on TDS can judge whether the water quality of raw drinking water quality test, are not the right approach; High-temperature cannot destroy bacteria or viruses, must pass through more sophisticated instruments can be measured.

11, in electrolyzer water quality test results?

Detection is one of the most shallow electrolyzer, which is the most basic, simple and convenient method; Is also the F.D.A. (the national food and drug administration) is recognized as the most simple of water quality inspection. Can display about sediment quality, by color to distinguish, but contained can't represent the real thing is what? Electrolytic results show that: the positive - iron bars, negative - aluminium rods. Iron red, iron oxide - water, pipe rust and electrolytic bar of iron loss; Green: heavy metal oxide - copper, mercury, lead, calcium, magnesium, etc.; White: organic matter - animals and plants death corruption and waste form, colloid, bacteria; Blue: organic phosphorus - detergent, pesticide, fertilizer, Red: heavy metal ion sink lake; Yellowish: the release of electrolyzer iron bars iron - normal water quality. Detailed instructions on the electrolyzer as the appended drawings.

12, what is a Heavy metal (Heavy Metals)? What effect does to the human body?

Refers to the chemical element periodic table of the metal bar atomic weight of more than 40 metal elements are known as heavy metals, such as: copper, mercury, cadmium, zinc, lead, nickel, chromium, manganese, iron, etc. Heavy metal deposition in the human body, causing serious damage, such as to cause the pathological changes of liver and kidney and nervous system; Heavy metals and even will be combined with organic compounds in water is chlorinated hydrocarbons (DDT - six broad spectrum of chlorinated benzene and similar pesticides) into a fish, shellfish or animal body, set up a chain reaction phase locked food chain.

13, high oxygen content in drinking water on the human body what are the benefits?

Blood and lymph circulation, is in order to get more oxygen to the cells. If the high oxygen content in water, can be more rapidly promote cell activation. If the water contains no oxygen, fish and shellfish will die. A liter of the oxygen content in the water should be over 5 mm in g. Long-term drinking pure water with high oxygen content, will increase in the washroom on the feeling, is because of the high pure water oxygen levels, easy for the body to absorb, promote the metabolism of human body.

14, what is the conductivity and electrical conductivity of water? What is the relationship between resistivity and?

Because the water contains a variety of dissolved salts, and exist in ionic form. When the water into a pair of electrodes, electricity, under the action of electric field, the charged ion can produce a certain direction of movement, moving water anion xiangyang, cation to move to the cathode, the conductive effect on aqueous solution. Water conductive ability strong or weak, is called a conductivity S (or conductance). Conductivity reflects the amount of water salinity, water purity is an important means of the needle. The pure water, the smaller the salinity, the greater the resistance, electric conductivity is less; Ultrapure water almost not conductive, the size of the conductivity is equal to the reciprocal of electrical resistance.

15, what is a water treatment before? What is the main method?

Water pretreatment is conducted in water purification treatment in advance before primary processing, so that the water purification to get good effect. Because most of the water contains a lot of impurities, such as silt, clay and organic matter, microorganism, the existence of these impurities, serious impact on water quality purification effect, must be to reduce or remove, these methods are called before processing. For regional water quality conditions, pure water machine USES different, different capacity, different multiple factors such as system design, pretreatment of the filter material used is different, the main purpose is prior to the purified water can build a good environment. Pretreatment methods mainly include: (1) precipitation: with large volume, low flow rate of natural precipitation method, such as settling basin. Coagulation (2) : the use of iron, aluminum, such as polymer flocculant, and the impurities in the water by flocculating, larger sediment particles and bridging role again by other devices, shall be removed. (3) filtering: has to be treated water, flows through the device is equipped with special filtering material, "entrapment" impurities in water, shall be removed. Soften (4) : using chemicals or cation exchange resin method, make the calcium, magnesium, iron ions in the water to remove. (5) : disinfection methods of adding medicament or use ultraviolet, ozone, eliminate the microorganisms in the water, bacteria, etc.

Unit 16, hardness is how to say?

Hardness of the commonly used unit is the tendency for L or mg/L. Because the hardness is not formed from a single metal ions or salts, therefore, in order to have a unified standard, it is necessary to conversion into a salt. Usually with calcium oxide (CaO) or is a mass concentration of calcium carbonate (CaCO3). When the hardness is tendency for 0.5 L equals 28 mg/L of CaO or equal to 50 mg/L of CaCO3.

17, pure water, and what's the difference between generally not treated water?

Pure water due to the influence of the impurities taste very good, besides no smell when you gave birth to drink, after down the throat at the end of the tongue with a throat feel glycol, sweet: (a) in pure water for brewing tea special delicious, even more resistant than the average water bubble bubble (permanent); Of course, milk or coffee. (2) special rice with pure water boiled out of white and Q (strength). (3) in plain boiled clam soup, the clam meat after boiling presented peng rose don't obvious phenomenon, and the clam meat contains a lot of sauce flavor of the mouth feel is very high, really is a great to enjoy life. (4) in the hot summer with containers (bottles and so on) as for the refrigerator refrigeration, water stay out drinking with cold, feeling is better than drinking mineral water or other drinks also, due to the pure water glycol, sweet, that cool, happy feeling is beyond description.

18, RO pure water machine can remove impurities of minerals, so, we don't need the minerals in the water?