Hycleen Industrial - Environmentally Friendly Disinfection Solution for Cooling Towers

GF Piping Systems Hycleen Industrial Environmentally Friendly Disinfection Solution for Cooling Towers

Hycleen Industrial Cooling water – ideal conditions for bacteria Cooling water temperature is usually considerably higher than 25 °C. A great number of nutrients enter the water through contact with dust and pollen from the air, as well as through contact with parts within in the cooling system. The elevated temperature and the supply of adequate nutrients provide the optimum conditions for the growth of bacteria and other micro-organisms (e.g. algae). Consequently, they proliferate exponentially and form unwanted biofilms. Hygiene is crucial It is imperative to prevent microbial contamination of the cooling water, since this condition can poses a severe threat to human health and impair the efficiency of the cooling system. Hazard to humans When the cooling water is in contact with air, fine water droplets (aerosol) are formed, which are released into the surroundings of the cooling tower. If this vapour is infested with bacteria (e.g. Legionella), inhalation by humans may cause serious diseases such as pneumonia. Affecting the efficiency of the cooling system Bacteria and other micro-organisms deposit on surfaces in the cooling system and form a biofilm. Such biofilms can 50 % Biofilm greatly impair circulation and heat transfer within the heat exchanger and the cooling tower. This loss of heat transfer is Lime significantly greater than that due to calcification. Moreover, the biofilm provides protection for bacteria so that they can proliferate and contaminate the whole system within a short period of time. 1 mm Layer thickness 2 Loss of cooling performance

Hycleen Industrial Requirements on the cooling tower In Germany, the VDI Directive 2047/2 stipulates No corrosion thanks to vortex sintering provisions to ensure the hygienic operation of Iron oxide is the ideal breeding ground for microbial growth. evaporative coolers. Gohl vortex sintering achieves the highest corrosion protection class C5-M in accordance with DIN 55633 and DIN The VDI Directive 2047/2 calls for regular inspections, main- EN ISO 12944 as tested and approved by the independent tenance work and repairs as well as microbiological and 'Institut für Korrosionsschutz Dresden GmbH' (Institute chemical water tests and also states which hygienic aspects for Corrosion Protection) at the Technical University of are to be taken into account in advance. That is why, E. W. Freiberg. Gohl GmbH commissioned the independent „Hygiene Institut des Ruhrgebiets“ to inspect and certify their cooling towers Professional service according to the requirements of the VDI Directive. A competent team of engineers and support staff are available to provide advice from planning to maintenance. E. W. Gohl GmbH cooling towers distinguish themselves For existing cooling towers, we provide an inventory with through the following key features: regard to economic, technical and hygienic specifications at www.gohl.de/info@gohl.de. Low-maintenance design Costs are considerably reduced by the fact that internal structures are easy to maintain and clean and, furthermore, samples for hygienic monitoring can be taken with no effort. Minimal exposure to light The closed design makes sure that the interior of the cooling tower is exposed to very little light which helps to reduce biological contamination (green algae). Selection of suitable materials The surfaces and materials used have been tested according to the DIN EN ISO 846 test method and certified as non- metabolisable. www.gohl.de/info@gohl.de 3

Hycleen Industrial 100% cooling performance and environmentally friendly With Hycleen Industrial we have developed an efficient disinfection solution to secure hygienic conditions in the cooling water in the long run - without using hazardous chemicals and without harming the environment. The Hycleen Des 30 disinfection unit is at the heart of the system. The combination of sophisticated process measuring and control technology one hand one and real-time hygiene monitoring on the others makes sure that Hycleen Industrial meets the highest requirements. 1 Hycleen Des 30 Environmentally friendly disinfection system Hycleen Des 30 is a device for the on-site generation of a highly active disinfectant which completely destroys germs thanks to its strong oxidizing power. • Bacteria do not stand a chance to develop any resistance • Diaphragm-electrolysis technology • Disinfectant generated from high-purity salt and softened water 2 Measuring and control Turn-key solution The process measuring and control technology takes care of the intelligent dosing of disinfectant and monitors the cooling water quality. • Cutting-edge sensor technology with controller • Reliable dosing pumps • Optional remote monitoring and data logger 3 Hycleen EWS Real time hygiene monitoring The Hycleen EWS measuring device monitors the hygienic condition in the cooling tower. Trends are detected immediately, enabling the operator to react at an early stage. • Real-time analysis within 15 minutes • Easy implementation • Optimization of disinfection parameters 4

The on-site generation of the disinfectant without dangerous chemicals involved is sustainable, environmentally friendly and energy efficient. In combination with hygiene monitoring, the volume of disinfectant can be reduced to a minimum. Cooling water is conventionally disinfected by randomly dosing the cooling water with large amounts of harmful biocides. These biocides are expensive, dangerous in handling and harmful to the environment. Besides, the Hazardous Substances Ordinance requires operators to check whether the use of less hazardous substances or solutions is possible. Hycleen Des 30 1 2 Measuringand Control Wet cooling tower Heat source Heat Exchanger 3 Hycleen EWS 5

Hycleen Industrial Benefits Efficiency Environment & Safety 100% cooling performance Environmentally friendly disinfectant Continuous, full cooling performance thanks to intelligent No contamination of natural waters. disinfection, no biofilm. No hazardous chemicals Process stability Manufacture, transport, storage and handling of hazardous No loss of quality and no production downtimes. chemicals is eliminated. Extended lifetime CO2 reduction Disinfectant is pH neutral and non-corrosive; no micro- No energy-intensive production and transport of bially induced corrosion (MIC). biocides. Hygiene Costs Highly effective disinfectant Inexpensive disinfection High bactericidal effect to prevent biofilms from forming. In comparison to conventional disinfection with biocides, Proven efficiency against Legionella according to DIN 13623. significantly reduced operating costs are achieved. Intelligent dosing Fully automated system Fresh water is inoculated to prevent microbial contamina- Minimal manpower. tion. Energy savings No development of resistance Cooling system performance at 100%, full heat transfer. Due to their oxidative destruction, bacteria cannot survive. Annual savings of 1600 kg of biocides* *As part of the reference project in Singen 6

Hycleen Industrial Reference project in Singen In collaboration with E. W. GOHL GmbH, the Hycleen Industrial disinfection solution was tested at Georg Fischer Automotive in Singen. The components of the Hycleen Industrial disinfection solution were installed in the cooling system and successfully applied in a long-term test. Starting position Georg Fischer Automotive in Singen manufactures automotive components. Excess heat from the production is discharged through wet cooling towers made by E. W. GOHL GmbH . The cooling system has a cooling capacity of 15 MW and is operated all year-round. Hygienic conditions in the cooling water used to be largely ensured through the use of considerable amounts of costly and hazardous chemicals. The shock dosage applied had only short-lived disinfecting effects and resulted in a rapid recontamination of the system. The Hycleen Industrial disinfection solution has been applied to ensure a long-term optimization of hygienic conditions in the cooling water. Result Thanks to the use of the Hycleen Industrial solution, hygienic conditions in the cooling system could be maintained at all times, even during the critical summer months. Any proliferation of bacteria, biofilms and algae was stopped sustainably. Avoiding the use of 1,600 kilograms of biocides has reduced operating costs substantially and protected the environment from harm. Cost savings Improved hygienic conditions Biocides Hycleen Industrial Biocides € Annual savings of Savings 1600 kg Hycleen Industrial of biocides* Years Time Operating costs could be reduced by more than 50 per cent Applying the Hycleen Industrial disinfection solution has thanks to the use of the fully automated on-site generation of stabilised the microbial contamination of the cooling water disinfectant. at a low level. 7 Total cost Contamination

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