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Large quantities of food waste and other kitchen waste accumulate in commercial kitchens, canteens, hotels, catering facilities and communal catering – this waste of food is now being fought worldwide. Modern closed disposal systems therefore offer an economically and ecologically sensible solution for the recycling of food waste, and there is also no odor nuisance in the kitchen.

A major problem with the interim storage of organic waste is open and often too small storage containers, the handling of which is generally very uncomfortable and causes considerable hygienic problems. But how do you get a correspondingly large and permanently odor-proof tank into the installation room, whether right next to the waste recycling company or even at a further location? Doors or stairs are often an insurmountable obstacle for factory-made tanks.

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In many commercial and industrial companies, there is a large amount of waste heat – energy that can be saved quickly if you use it sensibly. Usually, however, is the waste heat, e.g. cannot be used immediately during the manufacturing process or during cooling in air conditioning systems – the time delay can only be bridged with a buffer hot water tank.

These considerations led to the integration of a new hot water tank tank with a volume of 28,150 liters into the existing heating system at a large butcher’s shop in Berlin.
The company pakt (Potsdamer Anlagenbau und Kältetechnik GmbH) planned and designed a corresponding large buffer hot water tank in an outdoor installation. Loading takes place via a high-pressure heat pump and uses the waste heat generated in the air conditioning system. This is primarily used for hot water preparation, e.g. B. for cleaning, but also for heating support.

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A retention basin, in which rain and surface water is to be collected, was completely lined with GRP laminates from Haase. Both the price and the durability of the material were decisive for the customer’s decision.

The approx. 186 m² laminate was manufactured in the Großröhrsdorf plant, assembled to the correct size and then wound up as rolls. The transport to the construction site was not a problem. The GRP panels were anchored to the concrete and then all joints and panel transitions were overlaminated in a liquid-tight manner. This technology also enabled the absolutely tight connection of a DN250 inlet pipe using a GRP pipe socket and a rubber press seal. Finally, a UV-resistant protective coating was applied.

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A lying in the ground buffer hot water tank with a volume of 14,300 liters has recently been fed by a combined heat and power plant in a Bavarian thermal bath. The storage tank is designed for an operating temperature of up to 110 ° C and a maximum operating pressure of 3 bar.

Since the groundwater level at the desired installation location is very high, the hot water tank had to be equipped with a buoyancy protection. Buoyancy protection can be installed quickly and inexpensively for the underground buffer storage from Haase. To this end, tabs are laminated in the factory in the lower area of the hot water tank (so-called push knobs). After the storage tank has been inserted into the construction pit, a defined amount of commercially available concrete is poured around the tank, which secures the storage tank against any buoyancy with the help of the push knobs.

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Special precautionary measures must be taken in flood-prone areas. Tanks for supplying the heating system, for example, must be secured against floating. Just holding the heating oil tank on the floor is not enough. It must also be so stable that it can withstand the enormous water pressure that acts on the flooded tank.

The double-walled Haase basement tanks with buoyancy protection are approved by the German Institute for Building Technology (DIBt) for flooding heights of up to 1.70 m above the tank lid.

The on-site installation ensures that even difficult spatial access and space conditions are not a problem.

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Double-walled underground tanks from Haase have been proving themselves for over 35 years. Like the basement tanks, they are equipped with an automatic leak detection system and monitor themselves around the clock.
The high-quality material GRP guarantees dimensional stability, aging resistance and 100% freedom from corrosion. The high level of safety and proven technology allow double-walled Haase underground tanks to be stored even in flood-prone areas and when the groundwater level is high.
In these cases, the tank is simply provided with an inexpensive type of buoyancy protection.

Do you have any questions on this topic, would you like a specific offer or a free and non-binding on-site appointment with a Haase partner from your region? Please use our contact form.

A manufacturer of machines for food packaging had planned to move to a new location. An old industrial hall should be completely renovated for this purpose. An important part of this reconstruction was the installation of an inexpensive and future-proof heating system.

A highly efficient oil boiler should ensure the supply of heat. The necessary storage capacity was 60,000 liters. The customer opted for 4 Haase underground tanks, each with a filling volume of 15,000 liters. The conditions when installing the tanks on the factory premises were quite a challenge: the groundwater was only approx. 50 cm below the ground level. A lowering of the groundwater was therefore inevitable for the excavation of the pit.

After inserting the Haase underground tanks and filling the construction pit to approximately half the pit depth, the tanks were fitted with a buoyancy protection. This consists of a defined amount of concrete and is of course approved by the building authorities.

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The washing area operated by Jörg Behrens Technik was expanded from 3 to 6 self-service boxes. The separator systems were also renewed as part of this expansion. To do this, the groundwater first had to be lowered in order to be able to excavate the excavation pit. Both the sludge trap and the Haase oil separator could be moved due to the low weight of the excavator on site. The containers were then filled to just above the equator of the spherical tanks before the cost-effective buoyancy protection was applied with earth-moist concrete.

Thanks to the three-wall structure of the tank wall, the tanks are completely liquid-tight both from the outside and from the inside. Thus, the pressing groundwater cannot harm the separator system.

Since dirt and less light liquid are mainly generated during vehicle cleaning, the NS 20 S-II-I-P oil separator has been expanded with a pre-sludge trap. As a result, the disposal intervals of the separator system can be extended significantly, which can reduce the operating costs of the system.

The sludge trap was equipped with two inlets so that the feed pipes could be checked individually.

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The leak test of the separator system revealed leaks both in the separator and on the pipes. The system therefore had to be completely renovated.

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A farmhouse in Thuringia, built in 1880, has recently been home to a Haase hot water tank. A solar thermal system with a surface of approx. 30 m² and a 35 kW solid fuel boiler serve as the heat source for the storage. The spatial arrangement of the buffer tank and boiler in the boiler room even makes it possible to transport the wood directly to the boiler with a lift loader. This optimal use of space was only possible through the on-site installation of the Haase hot water tank, because it could be built up to the ceiling and thus only took up a small footprint of 2.50 m in diameter – and this with a volume of approx. 8,000 Liters!

In addition, the hot water tank is equipped with a fixed flange DN 80. This enables the use of an electrical heating cartridge. Thus, for example, the electricity generated in a photovoltaic system can be stored as heat. The new owner of the buffer storage would like to purchase a PV system shortly. The heating cartridge in the heat accumulator thus gives him the option of using the electricity himself completely (primarily in times when he is not paid) or to feed it into the public grid.

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A two-family house in Franconia was to be completely renovated in terms of energy and a controlled ventilation system with heat recovery should be integrated into the heating system. For this purpose, among other things, 16 m² flat-plate collectors for the collection of solar heat as well as an air-water heat pump with 18 kW heat output were provided. The requirements for the heating system of the house, which also houses an office, were divided into the supply of the underfloor heating (for approx. 240 m² of living space), the radiator (for approx. 110 m² of living space) and drinking water heating for 4 to 6 people. Of course, a hot water tank was also provided, which should be equipped with the necessary heat exchangers and of course be of a corresponding size.

The problem: access to the planned installation site, the attic, was typically restricted, so a factory-made container was out of the question. A Haase type T 410-14 hot water tank with a volume of 1,450 liters proved to be the technically and economically ideal solution. When fully assembled, this storage tank is 2.15 m high, but due to the on-site assembly, the insertion of the individual parts was not a problem.

The main arguments for the customer when choosing this hot water tank were the very low heat losses and the excellent layering properties of the Haase product.

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