Dosing and disinfection systems
GRUNDFOS dosing pumps are used for high precision dosing of liquids. The electrically driven diaphragm pumps are displacing liquids mechanically or hydraulically, dependending on the model.
The capacities of GRUNDFOS-ALLDOS pumps vary from 0,0025 l/h up to 8000 l/h.
Mounting is possible on horizontal and vertical surfaces too.
Pumps are optionally equiped with heated dosing head, pulse control, inductive dosing control or optoelectronic membrane integrity monitoring.
The “Smart Digital” range feature both manual and automatic control by contact signal (pulse) or analog signal (4-20 mA) as well as timer and weekly programmer. Stepper motor and special software control makes possible the precise dosing of difficult, degassing liquids too.
WATER DISINFECTION WITH CHLORINE GAS, CHLORINE DIOXIDE, OZON OR UV
GRUNDFOS VACUUPERM systems operate on the indirect vacuum principle for dosing of chlorine gas, carbon dioxide, ammonia or sulphur dioxide.
-compact installation with direct mounting on the gas cylinder, with maximum capacities from 40 g/h up to 2000 g/h.
-modular installation with the possibility of supply from a 40 kg cylinder or from 600-800 kg containers, with individually adjusted multipoint injection and maximum capacities between 40 g/h and 200 kg/h.
Both manual and automatic dose control is possible with adjustment based on flow, residual disinfectant concentration or other parameters. Essential elements of security for these systems are the gas leak detectors with visual and audio alarm as well as gas leakage neutralization systems.
GRUNDFOS SELCOPERM electrolytic chlorination systems are generating the sodium hypochlorite on-site using a solution of common salt (NaCl).
The hypochlorite solution generated has a pH value between 8 and 8.5, and a maximum equivalent chlorine concentration of approx. 8 g/l. It has a very long half-life which makes it ideal for storage in a buffer tank.
Another ideal method to ensure drinking water disinfection is the GRUNDFOS OXIPERM system for the production and dosing of chlorine dioxide. Chlorine dioxide is highly effective against a large number of germs and has a long residual effect in the system. A great advantage of chlorine dioxide over other disinfectants is its effectiveness against biofilm that forms in time on the inner surfaces of pipelines and tanks. This is why it is widely used in fighting Legionella.
Using chlorine dioxide as a disinfectant eliminates the risk of byproduct formation that could give water unpleasant taste or odor.
SITA and EUROTROL UV-systems use photooxidation by UV radiation as one of the most effective methods for water disinfection. The structure of DNA in bacteria or RNA in viruses is destroyed without the use of chemicals. Pathogens such as Cryptosporidium, Giardia, Legionella and Anthrax are destroyed by this method.
Water treatment with ozone is a method that is mainly used for disinfection, also for reduction of organic contents of water. In addition ozone oxidation is used in processes of iron and manganese removal. As it is a product of oxygen it is also used to disinfect ultrapure water.
DRY MATERIAL FEEDERS FOR FLOCCULANTS, COAGULANTS, LIME ETC.
GRUNDFOS POLYDOS systems for preparation of flocculant solutions are mainly used in water treatment and sludge dewatering processes.
These equipments are suitable for the preparation of polyelectrolyte solution, lime milk, etc., and are available with three, two or one compartment.
Capacities are ranging from 500 l/h to 10,000 l / h. The solutions prepared may be diluted using optional dilution modules.
GRUNDFOS dry material feeders are used for precise dosing of powders like aluminum sulphate, lime, phosphate, polyelectrolyte, activated carbon, etc. Dosage control is achieved manually or automatically by an external signal from a flow meter or other measuring instrument.