A comparative study of six hydroponic wastewater treatment plants.
2005 (English)In: Vatten, ISSN 0042-2886, no 2, 95-104 p.Article in journal (Other academic) Published
During the last two decades, wastewater treatment in systems combining conventional biological processes andhydroponics has been tried at several locations. In this article, six different systems are described and theirtreatment results compared. Five systems were found in literature, and the sixth system was constructed andoperated by the microbiology group at KTH. These systems can be divided into three subgroups: i) demonstrationsystems with small inflow and long hydraulic retention time (HRT), ii) pilot systems with small to moderateinflow and moderate HRT, iii) full scale systems with large inflow and short HRT. In general, removalof organic matter seems to be most efficient in systems resembling an active sludge process. Systems with longHRT appears over-dimensioned as long as the volume is not simultaneously used for treatment and production.Nitrogen was efficiently removed through conventional biological processes, whereas phosphorus removalthrough mainly sedimentation and adsorption in the systems was not very efficient. Nutrient removal bymeans of up-take through plant growth has not contributed significantly in any of the described treatmentsystems. None of the treatment plants have had the primary objective of biomass production. Hence, potentialremoval and recycling of nutrients through a productive system still remains to be answered.
Place, publisher, year, edition, pages
2005. no 2, 95-104 p.
wastewater treatment, hydroponics, BOD, nitrogen, phosphorus, greenhouse
Microbiology in the medical area
IdentifiersURN: urn:nbn:se:kth:diva-25259OAI: oai:DiVA.org:kth-25259DiVA: diva2:356848
QC 201010142010-10-142010-10-142010-10-14Bibliographically approved