In contrast to bacterial degradation, nutrient
assimilation by plants is limited by surface, as
photosynthesis is dependent on solar radiation.
Therefore, to achieve maximum nutrient recycling rates, trickling filter systems should provide a large surface area for plant growth and
photosynthesis in relation to their volume. In
theory, a planted trickling filter could double
its nutrient recycling capacity when constructed
halve as deep and with a surface twice as large.
Given this, possible applications of the concept
would not be in the classic wastewater treatment
disciplines where land use is regarded as loss of
efficiency, but rather in industry sectors already
using large surfaces for plant production. In
other words, the idea is not to replace existing
filter techniques in municipal wastewater treatment but to recruit producers of hydroponic vegetables as recipients and users of nutrient-rich
wastewaters. This approach reflects postulations
that suggested to re-integrate agronomic production forms nowadays separated in monocultures
to combined production systems [6].
In contrast to bacterial degradation, nutrientassimilation by plants is limited by surface, asphotosynthesis is dependent on solar radiation.Therefore, to achieve maximum nutrient recycling rates, trickling filter systems should provide a large surface area for plant growth andphotosynthesis in relation to their volume. Intheory, a planted trickling filter could doubleits nutrient recycling capacity when constructedhalve as deep and with a surface twice as large.Given this, possible applications of the conceptwould not be in the classic wastewater treatmentdisciplines where land use is regarded as loss ofefficiency, but rather in industry sectors alreadyusing large surfaces for plant production. Inother words, the idea is not to replace existingfilter techniques in municipal wastewater treatment but to recruit producers of hydroponic vegetables as recipients and users of nutrient-richwastewaters. This approach reflects postulationsthat suggested to re-integrate agronomic production forms nowadays separated in monoculturesto combined production systems [6].
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