References
In the interest of our customers and taking into account the current Basic Data Protection Regulation, we have decided to present only a few selected projects implemented by us here for information purposes. Please contact us for further
information on our company and the work we have carried out. A+H Anlagentechnik has been a member of the DVGW PQ Association for many years. Also here you can receive further information about our activities. Upon request, we will
be happy to provide you with the corresponding access data.
Excerpt of our reference customers
Waterworks in Coesfeld, Germany
Via the wells of the existing raw water extraction, the water is led via the newly installed physical deacidification plant (2 pieces of Riesler with 6,600m3/d each) and reaches two intermediate storage tanks.
From these, the water is fed via a regulated intermediate pumping station to the 2 softening reactors, treatment capacity per reactor max. 6,600m2/d, with the aim of softening to 10°dH. This is followed by a 2-line filtration stage
consisting of 4 steel pressure filters for turbidity filtration with a capacity of 3,000m3/d each. The water then enters two pure water chambers with a capacity of 350 m3 each. The network pumping station consists of 3 vertical,
frequency-controlled high-pressure pumps with a capacity of 6,600m3/d each. They take over the water distribution into the supply network. For the treatment of the raw water to drinking water according to the specifications of
the TVO, as well as for the aftertreatment of the rinse water, numerous auxiliary plants have been installed:
- Rinsing water pumping station
- Complete lime milk preparation and dosing plant for the production of lime milk from white fine lime.
- Fully automatic supply of the softening process with quartz sand as inoculation grain.
- Extraction, storage and disposal facilities for the residues arising from the softening process
- CO2 storage and dosing system for quantity-proportional dosing of carbon dioxide into the outlet pipe of the reactors. (to adjust the lime-carbon dioxide equilibrium)
- Neutralisation plant for the neutralisation of rinsing waste water from softening
- Chlorine gas, control and dosing system
- Sludge pumping station and sludge treatment of the residues from filtration including flocculation aid dosing
- Compressed air supply systems for the control of fittings and aggregates in the treatment process
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ENNI - Drinking water softening plant in Moers, Germany
Drinking water softening plant with downstream turbidity filtration. The softening plant serves to reduce the degree of hardness in raw water from approx. 21°dH to the hardness range 12-14° dH and thus supplies water in a moderate hardness
range. The total treatment capacity is approx. 24.000m3/d. The plant consists of:
- 2 rapid decarbonisation reactors with a treatment capacity of 10,800m3/d each
- 4 pieces turbidity filter Ø 4.500 mm
- Fully automatic supply of the softening process with quartz sand as inoculation grain
- Extraction, storage and disposal facilities for the residues arising from the softening process
- Fully automatic quicklime extinguishing system for the production of the lime-milk suspension required for the process, including dosing technology
- Peripheral storage and dosing systems for phosphate (PO4), sodium hydroxide NaOH), flocculants (FHM) and carbon dioxide (CO2)
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Waterworks Löhnen, Stadtwerke Dinslaken: Drinking water treatment with state-of-the-art technology - Germany's largest nanofiltration plant -
The construction of this plant was necessary in order to prevent changes in the flow conditions of the groundwater catchments, which are expected due to the declining development of coal mining. Trace substances from the Rhine bank filtrate
could penetrate into the groundwater wells, which cannot be safely removed with conventional treatment technology. The newly installed treatment system uses pressure-driven membrane modules to remove ions and particles in the
nanometer range. System description: The raw water from the existing water extraction is stored in two 600m raw water chambers. From here, the raw water is fed to the suction side of the 11 FEED pumps, which in turn convey
the raw water via 11 membrane module lines, adding an antiscalant to avoid scaling on the membrane modules. The water that passes through the nanofiltration lines is called PERMEAT. After membrane passage, it is buffered in
2 permeate containers of 300m3 each. From here, a permeate pumping station transfers the water to the pump reservoir of the conventional treatment system. The operation of a nanofiltration plant is very complex and requires
numerous auxiliary plants for its function. These are among others:
- Antiscalant, (coplex binder) storage and dosing system
- Preservative, (e.g. NaHSO3) storage and dosing system
- Acid, (e.g. H2SO4)- storage and dosing system
- Lye, (e.g. NaOH) storage and dosing system
- Rinsing and cleaning pumping stations
- Neutralization container with periphery
- Conveying, monitoring and discharge of the concentrate
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