Calcium hypochlorite is sold as “pool shock.” It is commonly found in a powder or granulated form containing 68% calcium hypochlorite and other salts. Sodium hypochlorite is a solid white powder, but is more commonly used dissolved in water. Using granular calcium hypochlorite to disinfect water is a two step process. Email : contact@chemtradeasia.com • To make a stock of chlorine solution (do not drink this!) Contact can damage eyes and skin, therefore, care must be taken when handling all the chlorine compounds. Mix the water column in the well thoroughly by pumping to recirculate the chlorinated water back into the well through a hose attached to a faucet or outside outlet. The present invention relates to a solid bleach containing form comprising a tablet wherein said tablet is comprised of calcium hypochlorite and one or more calcium sequestering agents. If not, add more chlorine solution to the well. 90 degree household bleach would be smelly, but 90 degree cal hypo will run your butt out of the house. Seal the upper open end of the well casing in an approved manner. pump house), a sanitary well seal may be used instead of the pitless adaptor. The basicity of the solution arises from the hydrolysis reaction, where calcium hypochlorite is broken down into hypochlorous acid and calcium hydroxide. Backwash the water softener and all filters (except carbon filters) with chlorinated water. Wear protective gloves, eye protection. A damaged formation seal will permit surface water and/or shallow groundwater to enter a well carrying pollutants into the water supply. It does this “killing” by combining with any threat it encounters, breaking down the cell wall and effectively rendering it useless. Use a pitless adaptor in the hookup of water supply lines to a drilled well. Ponding of surface water can permit pollutants to be carried down around the well casing and into the well. The natural upflow of water in the well will distribute the dissolved chlorine throughout the full depth of the well. Two or three consecutive safe tests are needed to guarantee there is no coliform bacteria present in the well and water supply system. Calcium hypochlorite systems tend to be used for small water treatment plants and well systems. To chlorinate a dug well because of coliform bacteria contamination. Hypochlorite is a chemical compound containing chlorine in an oxidated state, meaning that it has lost electrons. Washing kills the bacteria that can spread disease. As a sanitizer, Calcium hypochlorite can reduce enveloped and non-enveloped viruses that can easily spread due to open flesh. In addition to water treatment, Calcium hypochlorite is used in kitchens to disinfect surfaces and equipment. within twelve months after the previous bacteriological analysis. If this fails, subject the well to corrective action determined by a qualified professional. the well or water supply system has been opened for expansion or repair; the well water has tested positive for bacteriological contamination; and. The stability of solid calcium hypochlorite depends on the content of moisture, lime and impurities (e.g., magnesium hypochlorite and metal oxides), and the temperature and humidity of the storage area. The unstable nature of sodium hypochlorite solutions may result in the labeled chlorine concentration not being available for disinfection at the time of use. The two most common forms are sodium hypochlorite and calcium hypochlorite. The pitless adaptor readily disconnects to allow easy removal of the pump and/or supply line(s). One example of such a community is the village of Yamaranguila--home to 2,500 people living in the mountainous southwestern part of Honduras. It can be purchased in granular and tablet form containing 65-70% available chlorine by weight. In no case should the well head be buried. These contaminants cannot be detected by taste or visual inspection, making them a hidden hazard. 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Enjoyed the video? Caution: Before disinfecting the distribution system, temporarily remove or bypass any carbon filter in the system. All oil, grease, scum and other material which can harbour and protect bacteria from disinfectants should be thoroughly cleaned from the well. The pitless adaptor is designed to provide a water tight sanitary seal where the water supply line(s) passes through casing wall. Calcium hypochlorite is an inorganic compound with the formula Ca (ClO) 2a and is an active ingredient of several commercial products such as chlorine powder, bleaching powder, chlorinated lime, used for water treatment and as a bleaching agent. A suggested cleaning solution is one ounce calcium hypochlorite to one gallon hot water. Release the air from the pressure tank (except tanks with a permanent air cushion) to completely fill the tank with chlorinated water. Calcium Hypochlorite, Ca (OCl)₂ is a solid chemical used as a disinfectant and bleaching agent. – Label the containers, specifying the chlorine concentration. Dry calcium hypochlorite appeared on the US market in 1928. The water supply system can be disinfected in the manner previously outlined. This compound is relatively stable and has greater available chlorine than sodium hypochlorite (liquid bleach). To chlorinate a newly drilled well 6 inches in diameter and 220 feet deep. Finish the wellhead not less than 0.5 metres above ground level, or 0.3 metres above a pump house floor. Testing for bacterial contamination in a well and water supply system is recommended as follows: The purpose of disinfecting a dug or drilled well is to destroy all disease causing microorganisms (pathogens) that may have been introduced into the well during construction, hookup, maintenance, or as a result of faulty well construction. 133 Cecil Street, 12-03 Keck Seng Tower, A single pack pourable liquid hypochlorite bleach cleaning composition for cleaning a flushable toilet bowl wherein at least 50% by weight of the hypochlorite comprises potassium hypochlorite and which liquid contains a bleach-resistant organic sequestering agent having a molecular weight below 1500 which sequesters calcium. Neither compound occur naturally in the environment. – For calcium hypochlorite, leave the solution to rest for a few minutes and only use the supernatant. The following safeguards are helpful in preventing contamination problems in a well due to bacteria and other pollutants. A common form of sodium hypochlorite is household laundry bleach that has, at best, approximately 5% available chlorine. In an outside environment, the well must be capped with an approved vermin proof well cap; i.e. Calcium hypochlorite can react with carbon dioxide to form calcium carbonate, releasing dichloride monoxide. This video shows the reactive properties of Calcium Hypochlorite also known as Powdered Chlorine. 4.8 out of 5 stars 788. Shock chlorination of a dug or drilled well and water supply system is recommended immediately after: Note: Shock chlorination may not completely eliminate iron bacteria or sulphate-reducing bacteria from a well and water supply system, but should hold it in check. It also suspected of damaging the unborn child. However, this method was not very effective and became obsolete. Calcium hypochlorite remains fairly stable when dry retaining 90% of its chlorine content after a one year storage period. For nuisance problems, such as iron bacteria and sulphate reducing bacteria, a minimum chlorine concentration of 300 ppm is recommended. Chlorine compounds are the most popular disinfectant for drinking water because of their potency and effectiveness on a wide range of germs. to keep in check problems with iron bacteria and sulphate-reducing bacteria. Shock chlorination may have to be repeated periodically in order to control these problems. one that securely attaches to the well head to prevent tampering with the well, and has a screened vent to provide ventilation and prevent the entry of foreign materials including vermin into the well. The perforated container can be constructed from a short length of tubing capped at both ends. However, the temp of the solution is a strong factor in how fast it becomes unstable. Hazard Warnings: Borax decahydrate may be harmful if swallowed and can cause serious eye iritation. Powdered or granulated calcium hypochlorite is an effective option for chlorine disinfection. It exists as both anhydrous and hydrated forms, giving a basic aqueous solution. Prepare the stock solution by mixing the recommended amount of chlorine source with a few gallons of water in a clean plastic bucket. Anhydrous calcium hypochlorite containing 1% moisture may lose 1-3% available chlorine per year SECTION 10– DISPOSAL CONSIDERATIONS It is available in a variety of forms including powder, granules, briquettes and tablets. Make all connections to the well water tight. Calcium ProcessCalcium hypochlorite is manufactured using the calcium process, where chlorine is added to calcium hydroxide, yielding calcium hypochlorite, calcium chloride and water. Caution: Chlorinated water should NEVER be allowed to drain into the septic system. Minister’s Office, Environment, Climate Change and Municipalities, Guidelines for Disinfecting Dug and Drilled Wells. A wide variety of calcium hypochlorite for water cleaning options are available to you, … Liquid chlorine compounds should not be stored for more than 60 days. It can be purchased in granular and tablet form containing 65-70% available chlorine by weight. Sulphate-reducing bacteria feed off sulphate to produce hydrogen sulphide gas (characterized by a “rotten egg” odour) and scale deposits. The flow at the top of the well can be partially or completely restricted to reduce the loss of chlorine. Calcium hypochlorite is used to disinfect water in many small water systems serving communities in the developing world. Both problems can severely reduce well yield and the efficiency of the water supply system. A wide variety of calcium hypochlorite cleaning swimming pools options are available to you, such as type. A coliform contamination problem that persists after disinfection is indicative of poor well construction, degrading construction materials, or nearby land/water use activities. Tradeasia International Pte. Water Dry Calcium Hypochlorite 1 ½ cup 1 teaspoon 1 quart 1 Tablespoon (2.7 teaspoons) 2 quarts 2 Tablespoons (5.3 teaspoons) 1 gallon 4 Tablespoons (10.7 teaspoons) Liquid chlorine is volatile and will gradually reduce in strength over a short period of time in storage. Tel : +65-62276365. It has a strong scent of chlorine but is more stable than chlorine. It is also a safe disinfectant for use in cleaning livestock pen especially after an animal has died of a highly infectious viral disease. Solutions of sodium hypochlorite are commonly referred to as bleach, although household bleach also contains small amounts of several other compounds, including sodium hydroxide and calcium hypochlorite. You can use granular calcium hypochlorite to disinfect water. However, a shielded screened vent must be integrated into the application of the sanitary well seal. dissolve 1 heaping teaspoon (about one-quarter of an ounce) of high-test (78%) granular calcium hypochlorite for each two gallons (eight liters) of water. Calcium Hypochlorite is a granular (or powder) product typically used to chlorinate swimming pools. Stock solutions should be prepared to meet immediate needs only, liquid solutions lose strength rapidly unless properly stored. The main application of calcium hypochlorite is the disinfection of water. It destroys a variety of disease causing organisms … Sodium hypochlorite may be used in the absence of calcium hypochlorite. Do not use fertilizers around or near the well head. This product should be used only when a water hose with a good water pressure (e.g., 55 psi) is available. ten days after the well and water supply system has been disinfected; when there is a noticeable change in colour, odour, or taste of the well water; when flooding has occurred near the well; when any family member or animal becomes sick from a suspected waterborne disease; and. You'll get little dissolve rate at 40 degrees, much more at 70 and much higher at 90. Properly backfill the annular space around the well casing. Sodium and calcium hypochlorite are used primarily as bleaching agents or It also has a strong chlorine odor. It is used to treat skin ulcers. The well water should be retested if any samples do indicate coliform bacteria. Drain all water system accessories, such as water heaters and hot water tank, and allow them to refill with chlorinated water. Disinfection is also recommended for well systems that experience problems with iron bacteria or sulphate-reducing bacteria. Install anti-backflow devices on all faucets and outlets with hose connections. Do not rely on one sample. Calcium hypochlorite can also be manufactured using sodium process by chlorination of a slurry of lime and caustic soda and then dried under vacuum 2 NaOH + Ca(OH)2 + 2 Cl2 → Ca(OCl)2 + 2 NaCl + 2 H2O Chlorination Calcium hypochlorite can be manufactured by chlorination of hydrated lime. Iron bacteria create deposits of stringy, rusty coloured jelly-like slime on the inside of the well, pumping system, and in the water filled pore spaces in the ground. Routinely check well water for bacteriological contamination at least every 12 months to ensure the water supply is safe. Do not use wood in or around the well. Bacterial contaminants are common to the hands, tools and materials used in well construction and maintenance, requiring disinfection immediately after a well is worked on. Add and dissolve one heaping teaspoon of high-test granular calcium hypochlorite (approximately ¼ ounce) for each two gallons of water, or 5 milliliters (approximately 7 grams) per 7.5 liters of water. 3. The Department of Environment has strict guidelines that must be followed to properly and legally seal an abandoned well. Ammonium Hydroxide (e.g., household ammonia): Solutions of household ammonia are recommended for cleaning light colored stones. Alibaba.com offers 914 calcium hypochlorite for water cleaning products. First, through an outside hose until no further chlorine odour is detected, then through each faucet or outlet within the home until they, too, indicate no further chlorine odour. In an inside environment (e.g. Storage of any chlorine compound is difficult, therefore, it is best to have on hand only the amount needed at any one time. Clean the well. This page and all contents are copyright, Government of Newfoundland and Labrador, all rights reserved. Chlorine is also easy to use, relatively inexpensive, and persists in a well long enough to kill harmful organisms. The returning water must have a strong chlorine odour. Dry chlorine compounds should not be stored for more than one year. Calcium hypochlorite is one of the best chemical disinfectants for water, better than household bleach by far. Note: For chlorinating drilled wells, normally the well depth to the water line is negligible and therefore does not require consideration. The more familiar liquid sodium hypochlorite (NaOCl), which is commonly known as bleach, is also used at smaller installations, although it is now … We’ll use the Dry Calcium Hypochlorite to make our own bleach solution, to purify water. To disinfect a newly constructed well, a well contaminated with coliform bacteria, or following repairs to a well or water supply system, a minimum chlorine concentration of 200 ppm is recommended. Scrub all accessible interior surfaces (including the well cap) using a strong chlorine solution and alkalis if required. Chlorine bleach should always be kept away from ammonia, as the two combined create toxic gases. In an inside environment (e.g. Slope the area around the well head for a distance of at least 5 metres to divert surface water away from the well. It is also known as “Pool Shock“. Of the chlorine compounds, calcium hypochlorite is the preferred source of chlorine used to disinfect wells. After the well has been thoroughly pumped to flush the system of chlorine, use the water supply (except for drinking) for approximately 10 days. Then sample for the presence of coliform bacteria. Note: Failure to provide adequate ventilation to a drilled well will likely result in damage to the formation seal due to a vacuum created inside the well during ‘drawdown’ of the water level. Groundwater is naturally bacteria free, therefore, the presence of bacteria may indicate a problem with well construction or hookup. It is widely used in two main ways; to disinfect swimming pool and disinfect drinking water. Most commercially sold cal hypo products contain anywhere between 65% and 75% chlorine in the mixture. pump house), a sanitary well seal may be used instead of the vermin proof well cap. 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