Neuer Zeitschriftenbeitrag von Regnery et al. 2017

There is increasing interest worldwide to utilize unconventional water resources such as reclaimed water, urban stormwater, or impaired surface water to augment drinking water supplies. Given the presence of traditional and emerging microbial and chemical contaminants (e.g., pathogens, trace organic chemicals, nutrients, trace metals) in these waters, ef fi cient and reliable treatment processes are needed to assure a product water quality that is protective of public health. Natural treatment processes such as managed aquifer recharge (MAR) combine the bene fi ts of ef fi cient biological treatment for these contaminants with a low carbon footprint and a residual free operation. The drawbacks of MAR are the rather large space requirements and a lack of process understanding that can guide more ef fi cient design and operation of these facilities. Among appropriate design and operational parameters as well as geochemical and hydrological conditions, retention time has been identi fi ed as a key parameter to achieve attenuation of microbial and chemical contaminants during MAR. Shorter retention time can result in signi fi cantly reduced footprints and thus facilitate the integration of MAR into urban and peri-urban water infrastructure. However, different minimum retention times are required to achieve reliable removal of microbial and chemical contaminants.

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