1. Effects of design and operational parameters on ammonium removal by single-stage French vertical flow filters treating raw domestic wastewater
- Author
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Rémy Gourdon, Ania Morvannou, Yoann Millot, Diederik P.L. Rousseau, Dirk Esser, S. Troesch, Pascal Molle, Epur Nature SAS, Universiteit Gent = Ghent University [Belgium] (UGENT), Laboratoire de Génie Civil et d'Ingénierie Environnementale (LGCIE), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA), SINT, Société d'Ingénierie Nature & Technique, Qualité des eaux et prévention des pollutions (UR QELY), Centre national du machinisme agricole, du génie rural, des eaux et forêts (CEMAGREF), Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), Déchets Eaux Environnement Pollutions (DEEP), Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA), and Universiteit Gent [Ghent]
- Subjects
Chabazite ,Technology and Engineering ,Design ,Environmental Engineering ,0208 environmental biotechnology ,Sewage ,CONSTRUCTED WETLANDS ,TREATMENT PERFORMANCES ,02 engineering and technology ,010501 environmental sciences ,Management, Monitoring, Policy and Law ,SORPTION ,01 natural sciences ,Vertical flow constructed wetland ,Domestic wastewater ,law.invention ,chemistry.chemical_compound ,Nitrate ,law ,TOTAL NITROGEN REMOVAL ,Ammonium ,Zeolite ,Filtration ,0105 earth and related environmental sciences ,Nature and Landscape Conservation ,business.industry ,Environmental engineering ,[SDE.ES]Environmental Sciences/Environmental and Society ,6. Clean water ,020801 environmental engineering ,RECIRCULATION ,chemistry ,Wastewater ,Earth and Environmental Sciences ,Constructed wetland ,Environmental science ,business - Abstract
International audience; Four pilot-scale single-stage vertical flow filters (of 2.25 m2 each), treating raw domestic sewage, were studied over 20 months in order to assess the impact of different designs and operational conditions on treatment efficiency. One of them was designed and operated as a standard 1st stage “French” vertical flow constructed wetland unit. The other 3 pilots differed from the standard pilot with respect to the filtration depth, the loading rate or the partial replacement of gravel by zeolite (chabazite), respectively. The pilots were monitored by analysing 24-h flow-weighted composite samples for TSS, CODtot, CODd, ammonium, nitrate and carbonate. All pilots showed a high ability to remove TSS and CODtot, with average removal of 81% and 75%, respectively. Increasing the depth of the filtration layer from 40 to 100 cm allowed to significantly improve ammonium removal (81%), whereas the simultaneous increase in hydraulic and organic loads resulted in a deterioration of ammonium and CODd removals (44% for both parameters). Using zeolite did not induce any observable improvements in ammonium removal under the conditions of the study.
- Published
- 2016