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[...]Safe working in manholes – safe opening and access Manholes fulfil an important task in water supply and wastewater disposal. They are used for example where shut-off fittings in pipelines must be accessible, or to control sections of very long pipelines, and for aeration/deaeration or access to complex installations (e.g. well shafts, pressure reduction shafts). Easy and safe access must be ensured in each individual application. Most of the manholes are entered from the top. This means that the operating personnel must open the manhole cover in order to then be able to use an entrance [...]

[...]All-round building protection with tested security We must eliminate the risk of any manipulation of our drinking water and its quality. Access to the free water surface must be prevented and the plants protected against vandalism and theft. The exterior shell of objects should therefore be designed as a mechanical barrier with a long resistance time. Criminal investigation departments recommend, among other measures, the use of security doors certified to resistance class RC3 or RC4 in compliance with DIN EN 1627. For vertical access, it is best to use tested security manholes covers . Certified[...]

[...]Grit washing for Reduction of the Organic Matter Contained in Grit Grit and mineral substances from the grit chambers of municipal wastewater treatment plants usually contain a large to very large proportion of organic substances, which have settled in the grit chamber together with the grit. Grit washing has become an established process for the treatment of grit from grit chambers over the last decades. HUBER Grit Washing Plants have been in operation worldwide for more than 25 years and have set the standard for modern and efficient processing of grit from wastewater treatment plants to [...]

[...]Highest purification quality and reuse of wastewater The membrane bioreactor process is a biological wastewater treatment process that works according to the principle of the activated sludge process (aerobic biological treatment of organically polluted wastewater with activated sludge), except that the secondary sedimentation tank, which ensures biomass retention, is replaced by membrane filtration. Membrane Technology Membrane Bioreactor Process The use of membrane technology greatly reduces the space required, as the structures necessary for the treatment process at municipal and industrial [...]

[...]Efficient wastewater pre-treatment to achieve indirect discharge quality Compared to municipal wastewater, the generated industrial wastewater is much more polluted, and the composition of the wastewater varies greatly. In particular, pollution by organic or inorganic substances depends on the sector of industry, the product range, the production methods and, last but not least, the individual usage behaviour. Many industries discharge their wastewater directly into the sewer and must therefore comply with certain limits for COD and solids, ensure pH neutrality and reduce grease content to a minimum[...]

[...]Production increase or conversion of production make it necessary to upgrade the wastewater treatment systems For reasons of cost and efficiency, industrial wastewater treatment plants are often planned and constructed according to the current capacity utilisation of the facilities. Changes in production and product changes, capacity increases and other factors often lead to plants being too small at the time of commissioning or after a few years already, and the required effluent qualities can no longer be achieved. While machine technology that is too small can often be easily adapted to the [...]

[...]Process engineering solutions for the treatment of drinking water For the production of drinking water (especially when surface water is used), physical process steps are often necessary to remove solids of different types and sizes. HUBER has customized mechanical and process engineering solutions for the various applications: Specially developed screens for water abstraction remove all inadmissible coarse and solid matter from the raw water from rivers and seas. If required, suitable devices for fish protection can also be provided. Particularly in the case of machine technology for seawater [...]

[...]Minimise wear and increase operating reliability For the operating safety and reliability of wastewater treatment plants, it is necessary to separate the grit transported with the wastewater and other mineral materials from the putrescible organic matter. For this purpose, grit chambers of various designs are used in practice. Depending on the type of grit trap, grease can also be separated in addition to grit. The removal of grit from the wastewater serves to prevent operational troubles, such as grit sedimentation (in aeration tanks and digesters), increased wear (of pumps, stirrers) and [...]

[...]Elimination and reduction of micropollutants with the PAC process Trace substances can be removed from wastewater with the help of powdered activated carbon (PAC), as the micropollutants adsorb to the activated carbon. Powdered activated carbon is ground activated carbon. According to DIN 12903, at least 95 percent of the mass fraction must have a grain size of less than 150 µm. The average particle diameter of typical powdered activated carbons is approximately in the range of 10 µm to 50 µm. For the elimination of micropollutants, the powdered activated carbon is added directly to the wastewater[...]

[...]Sustainable processing and recycling of mineral waste Mineral-rich wastes such as street sweepings, sludge from sewer flushing and cleaning of stormwater tanks and gullies, and grit trap material contain not only grit and gravel but also trash (e.g. packaging material), coarse materials (e.g. stones, wood, glass, metal parts) and organic materials (e.g. soil, leaves, grass, fruit stones and cereal grains). For the processing and treatment of such mineral wastes HUBER offers individually designed grit treatment processes. Process Process technology according to requirements Depending on the required[...]