Details

Autor(en) / Beteiligte

• Karakurt-Fischer, Sema
• Sanz-Prat, Alicia
• Greskowiak, Janek
• Ergh, Martin
• Gerdes, Heiko
• Massmann, Gudrun
• Ederer, Jürgen
• Regnery, Julia
• Hübner, Uwe
• Drewes, Jörg E.

Titel

Developing a novel biofiltration treatment system by coupling high-rate infiltration trench technology with a plug-flow porous-media bioreactor

Ist Teil von

• The Science of the total environment, 2020-06, Vol.722, p.137890-137890, Article 137890

Ort / Verlag

Netherlands: Elsevier B.V

Erscheinungsjahr

2020

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The sequence of two infiltration steps combined with an intermediate aeration named ‘sequential managed aquifer recharge technology (SMART)’ proved to be a promising approach to replenish groundwater using treated wastewater effluents or impaired surface waters due to efficient inactivation of pathogens and improved removal of many trace organic chemicals. To minimize the physical footprint of such systems and overcome limitations through site-specific heterogeneity at conventional MAR sites, an engineered approach was taken to further advance the SMART concept. This study investigated the establishment of plug-flow conditions in a pilot scale subsurface bioreactor by providing highly controlled hydraulic conditions. Such a system, with a substantially reduced physical footprint in comparison to conventional MAR systems, could be applied independent of local hydrogeological conditions. The desired redox conditions in the bioreactor are achieved by in-situ oxygen delivery, to maintain the homogenous flow conditions and eliminate typical pumping costs. For the time being, this study investigated hydraulic conditions and the initial performance regarding the removal of chemical constituents during baseline operation of the SMARTplus bioreactor. The fit of the observed and simulated breakthrough curves from the pulse injection tracer test indicated successful establishment of plug-flow conditions throughout the bioreactor. The performance data obtained during baseline operation confirmed similar trace organic chemical biotransformation as previously observed in lab- and field-scale MAR systems during travel times of <13 h. [Display omitted] •Novel treatment concept with high-rate infiltration trenches and in-situ aeration•Minimizes the physical footprint and the impact of site-specific heterogeneities•Utilization of 3D flow and transport model for hydraulic characterization•Establishment of plug-flow at high infiltration rates via infiltration trench•Similar removal of TOrCs at reduced HRT during baseline operation as in MAR systems