Biofilms on aged Materials in Household Installation Systems
© DIV Deutscher Industrieverlag GmbH (8/2010)
The causes of contamination originate in the water itself and on materials in contact with water. Drinking water is not sterile and does not have to be. Water treatment plants’ strategy consists in removing the nutrients that bacteria feed on to produce “biostable” drinking water. This allows in many cases chlorination to be avoided. But it is known that even biologically stable drinking water with very low nutrient content still contains micro-organisms. These micro-organisms can multiply themselves if they encounter nutrients.

Developing an Integrated Water Resources Management (IWRM) Concept for the Capital Brasília
© DIV Deutscher Industrieverlag GmbH (8/2010)
IWAS-Áqua DF Brasília

Experimental Investigation of the Effect of Flip Bucket Splitters on Plunge Pool Geometry
© Springer Vieweg | Springer Fachmedien Wiesbaden GmbH (4/2010)
Flip buckets are common hydraulic structures aiming at deflecting high velocity flows to a free jet trajectory. Systematic experimental tests have been performed to assess the influence on energy dissipation and the plunge pool geometry of varied repartitions of splitters along the flip bucket width. In particular, it is shown that some configurations can create more erosion than a continuous channel without flip bucket.

CPF Cast Surfaces Prove their Worth in Drinking Water Reservoirs
© DIV Deutscher Industrieverlag GmbH (9/2009)
According to EN 1508 [1], “Service reservoirs shall be designed, constructed and operated to prevent contamination or other chemical, physical and biological changes that are detrimental to the water quality”. Only approved materials shall be used in the surfaces in contact with the stored water. “ In order to facilitate subsequent cleaning and avoid bacterial growth, internal surfaces shall be as smooth and pore-free as possible.

Long term experience with Germany’s largest membrane filtration plant for drinking water production (7,000 m3/h)
© DIV Deutscher Industrieverlag GmbH (9/2009)
Currently, around 100 membrane filtration plants are in operation in Germany, of which 85 % are operated with low pressure porous microfiltration (MF) and ultrafiltration (UF) membranes. About 90 % of the total number of plants uses spring and well water as a raw water resource and just 7 % are fed with reservoir water. However, related to the total capacity of roughly 325,000 m3 produced drinking water per day by porous membranes in Germany about 60 % is from reservoir water, meaning a lot of water is produced by a small number of large plants.

Raw water quality prognosis
© DIV Deutscher Industrieverlag GmbH (9/2009)
Hydrogeochemical modelling of raw water quality – a planning and forecasting tool

Energy efficient process for xylene isomer separation: The use of nanocomposite MFI-ceramic hollow fibres
© Aristotle University of Thessaloniki (6/2009)
The use of hollow fibre geometry has long been a solution for improving the performance of lessenergy intensive membrane-based separation processes. Industrial application of this type of configuration is known in water treatment where polymer hollow fibres are commonly used. However polymer hollow fibres are thermally and chemically unstable and thus insuitable for high temperature applications.

Optimisation of water resources management for insular and geographically isolated areas
© Aristotle University of Thessaloniki (6/2009)
Recently, more attention has been given to the utilization of alternative water sources, such as desalinated seawater and reclaimed water, particularly in insular areas lacking substantial freshwater resources. The use of mathematical modelling can assist in making the right decisions, with respect to water management, as the increased complexity, due to various potential solutions, is impending the derivation of the optimal solution.

Sorption kinetics of PAH by using various sorbents
© Aristotle University of Thessaloniki (6/2009)
Polycyclic aromatic hyrocarbons (PAH), which are a large group of organic compounds with two or more fused rings, are an important threat to the environment. They occur in the aquatic environment as the result of oil spills, ship traffic, pyrolytic processes, domestic and industrial wastewater discharges.

Canal de Alicante Seawater Desalination Plant.
© Infoenviro (12/2008)
The recently completed Canal de Alicante (Alicante II) desalination plant is located along the coastal stretch between Agua Amarga and the El Atlet beach; near the seawater desalination facility Canal de Alicante, in operation since late 2003. The new plant produces 65,000 m3/day of desalinated water.

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