Water Treatment Disinfection

May 28, 2010 by Leave a Comment

　　Water disinfection techniques commonly used are:

　　1) Chlorine Disinfection

　　Chlorine disinfection is mainly through the oxidation of hypochlorite to kill bacteria, sodium hypochlorite is a small neutral molecule, can spread to the negatively charged surface bacteriological, bacteriological through the cell wall of bacteria through to the inside, and from oxidation, destruction of bacteria bacterial enzyme system Reship death, but for water, viruses, parasites kill the eggs less effective.

　　2) Ozone

　　Ozone oxidation and disinfection mechanisms, including direct indirect oxidation of free radicals, and chlorine and chlorine dioxide as the structure of micro-organisms through oxidative damage, to achieve the purpose of disinfection.

　　3) Chlorine dioxide

　　Chlorine dioxide disinfection mechanism is the oxidation can be better to kill bacteria, viruses, and does not produce damage on the plants and animals, sterilization lasted longer, the affected small, can be deodorant, to color.

　　4) Chloramines

　　Chloramines disinfection is the chlorine derivatives of disinfection methods, due to chloramines disinfection is slow, and it can not be as basic disinfectant, once disabled.

　　5) UV disinfection

　　The mechanism of UV disinfection is a certain dose of UV radiation can damage the structure of biological cells, by damaging the genetic material and biological to kill aquatic life, so as to achieve the purpose of water purification.

Filed under water treatment chemicals Tagged with

Drinking Water Treatment Process

May 27, 2010 by Leave a Comment

　　In general, tap water tap water plant production is divided into four stages, water, filtration, disinfection and water. Tap water into the water plant, the first process is to filter, bamboo water plant using poly aluminum chloride (plus SO42-) as a precipitating agent, the concentration of 6% AlCl3 drug pool, the water concentration of 2mg / L.

　　The filtered water should be disinfected with chlorine disinfectants. Inorganic substances that produce the smell of it, it can be oxidized thoroughly disinfected, the living natural material such as algae, bacteria, it can penetrate the cell wall; oxidation of the enzyme system (enzyme biological catalyst) lost its activity and life activity of bacteria killed by the barrier.

Filed under water treatment chemicals Tagged with

Alum Water Treatment

May 19, 2010 by 1 Comment

　　Alum dissolves in water ionization can produce Al3 +, Al3 + and hydropower generated from the combination of OH ˉ generated aluminum hydroxide, aluminum hydroxide, colloidal particles with a positive charge, with negatively charged sand particles encounter each other was in charge and .Loss of charge particles, they will quickly coalesce together, the more particles larger end, and finally went to the bottom. This becomes clear clean water.

　　But the alum containing aluminum ions, alum treated water; the aluminum element can remain in the water. The aluminum does not belong to the trace elements necessary for the body, so excessive intake of aluminum element is harmful to human body. High content of aluminum element in the human body, it will affect the absorption of phosphorus.

　　In recent years, we also found that the emergence of Alzheimer’s disease and usually have too many elements in the aluminum intake. Using alum or other aluminum salts for purifying agent, also increases the water content of aluminum, so that people’s health is threatened.

　　In one word, healthy people occasionally a small amount of alum intake no big problem, but the adverse long-term consumption on health.

Filed under water treatment chemicals Tagged with

Application of Ferrous Sulfate

May 17, 2010 by 4 Comments

　　Ferrous sulfate is an inorganic compound, the most commonly used blue-green of its seven-hydrate. Anhydrous ferrous sulfate is white powder, containing crystal water is light green crystal, crystal, also known as “green vitriol”, soluble in water, its aqueous solution is light green.

　　Application of ferrous sulfate:

　　Ferrous sulfate can be used as flocculants in water treatment can also be used in municipal and industrial wastewater treatment plants as chemical phosphorus removal to prevent surface water eutrophication.

　　Ferrous sulfate can be used as industrial reducing agent in the Chromate treatment of cement, ferrous sulfate and water in response to an excess amount of water the role of antioxidants, such as application of the boiler room temperature oxygen removal process.

Filed under water treatment chemicals Tagged with ,

The use of Scale Inhibitor

May 14, 2010 by Leave a Comment

　　Scale inhibitor is water insoluble can spread salt to prevent or interfere with the metal surface of insoluble inorganic salt precipitation, scaling functions, and maintain metal equipment with good heat transfer effect of a class of pharmaceutical.

　　Organic phosphate scale inhibitor can be divided into series of scale inhibitor and organic propionate scale inhibitor, scale inhibitor compound, RO scale inhibitor.

　　Mechanism of corrosion and scale inhibitors are divided into: contact and volatilization, lattice distortion, electrostatic repulsion.

　　Corrosion inhibitor for cooling equipment and the specific amino resin with epoxy resin as the base materials, adding the right amount of all rust, corrosion and other additives formulated, as a single component. It has excellent shield, impervious, corrosion properties, good scale, thermal conductivity, excellent resistance to weak acid, alkali, organic solvent properties, its strong adhesion, and the film light, flexible, compact, hard . Same time, it has excellent heat resistance (medium term working temperature ≤ 150 ℃), water resistance, resistance to corrosive media such as the performance of industrial water.

Filed under water treatment chemicals Tagged with ,

Criterion of activated Carbon Water Filters

May 14, 2010 by 1 Comment

The quality of activated carbon water filters main parameters to judge from the following:

　　Moisture (%) ≤ 5

　　Strength (%) (Ball milling) ≥ 90

　　Iodine adsorption (mg / g) ≥ 1000

　　Methylene blue adsorption (mg / g) ≥ 135

　　Phenol adsorption (mg / g) ≥ 120

　　Semi-dechlorination value (cm) ≤ 6.0

　　Stacking density (g/cm3) ≤ 0.5

　　Size does not require

　　pH 4 ~ 11

　　Chloride (%) ≤ 0.5

　　Lead (μg / g) ≤ 10

　　Zinc (μg / g) ≤ 50

　　Cadmium (μg / g) ≤ 1

　　Arsenic (μg / g) ≤ 2

Filed under water treatment chemicals Tagged with

The Use Of Activated Carbon Water Purifier

May 13, 2010 by 3 Comments

　　Activated carbon water purifier is generally columnar grain, large surface area, pore developed, high mechanical strength, absorption speed, clean high, hard off powder, long life.

　　Activated carbon can be widely used in water purification chemicals, electronics, medicine, printing and dyeing, food and water, industrial water, solution filtration, adsorption purification, cleaning, can also be used to purify industrial waste water depth. It can effectively remove the odor, chlorine, cyanide and heavy metal ions and other harmful substances, and bleaching.

　　Series of activated carbon water quality fruit shell coconut shell as raw material, adopting advanced production technology refined processed products have developed pore structure, high strength, low impurities, particle size appropriate resistance, easy regeneration and so on. Have excellent water quality purification effect, it will not only remove the stench odor, improve water purity. Various impurities in water such as chlorine, phenol, arsenic, lead, cyanide, pesticides and other harmful substances have a high removal rate. It can be used in filling all kinds of large, medium and small water purifier. Also applies to sugar, soft drinks, the bleaching and refining, as well as indoor and outdoor air purification, especially the special composition of activated carbon loading on the interior of harmful gases such as ammonia, formaldehyde, has better cleaning performance.

Filed under water treatment chemicals Tagged with ,

Cooling Water Treatment Chemicals

May 10, 2010 by Leave a Comment

　　The list of cooling water treatment chemicals:

　　Such as coagulant, aluminum sulfate, modified aluminum chloride, polymeric ferric chloride, ferrous sulfate, aluminum chloride, polyacrylamide, aluminum ammonium sulfate, ferric chloride, ferric sulfate, aluminum chloride crystal to help coagulant, poly diallyl dimethyl ammonium chloride, ferric chloride, acrylic acid, dimethylamino ethyl chloride copolymer, acrylic acid / acryl amide copolymer, polyacrylamide olefin derivatives, sodium alginate, sodium polyacrylate, anionic polyacrylamide, calcium oxide, Sodium carbonate, calcium hypochlorite, sulfuric acid, liquid chlorine, sodium hypochlorite, sodium silicate, betonies, polyacrylamide, calcium oxide, calcium hydroxide, disodium hydrogen phosphate, sodium phosphate, sodium hydroxide, sodium carbonate and so on.

Filed under water treatment chemicals Tagged with ,

Residential Water Treatment

May 5, 2010 by Leave a Comment

　　Residential water treatment should be multi-level processing, the basic three levels:

　　First level: central water pre-filtration

　　1. The significance of pre-filter

　　Central water to meet residential, that is competent Road, purification, water from the water company after a very long into the municipal pipe network every household, people have been using the water pipeline sediments, the second water tank, pipe leakage, etc. The pollution contains a lot of solid material impurities and harmful chemicals, such as rust, silt, dead animals, free residual chlorine and its compounds, chloroform (carcinogens). Long-term consumption on the formation of public health hazards, while the water they contain harmful ingredients, will enter the body through the skin, on human health are equally significant harm.

　　2. Intermediate level: water softening

　　It is based mainly on the affordability of owners and preferences set. Soft very popular in developed countries, in China Beijing and Shanghai, the use of soft water also enjoys popular support.

　　3. Terminal levels: pure of Drinking Water

　　The advantage is that bacteria, viruses, scale, pollutants can not film, a concentrated water discharge, water quality is always to ensure safe, reliable, and there is no water pollution problems.

　　The disadvantage is the water production is small, just enough for drinking, cooking. To Coater brand equipment, for example, can only produce 110 liters of water a day.

Filed under water treatment chemicals Tagged with ,

Water treatment chemicals

April 26, 2010 by Leave a Comment

　　Water treatment chemicals, also known as water treatment chemicals, mainly refers to industrial water treatment chemicals used, including cooling water, boiler water, sewage, water and other industrial water treatment field with the scale inhibitor, corrosion inhibitor, dispersing agent, disinfection of algal agents, defamers, flocculants, oxygen scavenger, sludge conditioning agents, chelating agents, etc.. Raw water and wastewater treatment coagulant and flocculent used is also included in the water treatment chemicals. In addition, activated carbon and ion exchange resins are also important water treatment chemicals.

　　Statistics in a foreign country, the water treatment agent, including the following three categories of products:

　　1. Chemicals: the former refers to inorganic chemical products for water treatment, such as aluminum sulfate.

　　2. Specialty Chemicals: including carbon, ion exchange resins and organic polymer flocculants.

　　3. Formulation of chemicals: including corrosion inhibitors, scale inhibitors, bactericides and combustion additives.

Filed under water treatment chemicals Tagged with

← Older posts