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SUMMARY:Exploring Duckweed for Remediation of\, and Resource Recovery from
  Industrial Fish Filleting WasteWater
DTSTART;VALUE=DATE-TIME:20261001T121500Z
DTEND;VALUE=DATE-TIME:20261001T123000Z
DTSTAMP;VALUE=DATE-TIME:20260916T130421Z
UID:indico-contribution-2929@cern.ch
DESCRIPTION:Speakers: Alexandra Katsara (University College Cork)\nSeafood
  processing industries generate significant volumes of highly polluted was
 tewater that poses serious environmental challenges. The characteristics o
 f seafood processing wastewaters were identified\, focussing on the differ
 ent processing stages. Fish filleting wastewater\, generated from food-gra
 de raw materials\, contains plant nutrients\, oils\, proteins\, and other 
 organic compounds that are costly to remove yet represent underutilized re
 sources. Within the Horizon Europe IMPRESS project\, duckweed cultivation 
 was explored as a strategy to both remediate these wastewaters and convert
  their nutrients into high-value biomass. Duckweed species (Landoltia punc
 tata\, Lemna minor\, Lemna minuta) displayed good growth on fish processin
 g wastewater\, measured as a relative growth rate (RGR). Different dilutio
 ns of wastewater from the fish deheading stage gave excellent growth of Le
 . minor and plant health was good as ascertained using chlorophyll fluorom
 etry. Different adjustments were applied to the wastewater to optimize Le.
 minor biomass growth\, including pH adjustment\, addition of micro-nutrien
 ts and of potassium\, calcium and magnesium. Dilutions of 25% and 50% of t
 he “raw” fish wastewater were found to be optimal for duckweed cultiva
 tion. A small-scale duckweed treatment system revealed that Le. minor cult
 ivation in fish deheading wastewater results in rapid nitrogen removal fro
 m the wastewater and considerable levels of total soluble protein in the b
 iomass. This approach highlights duckweed’s potential as a biological ag
 ent\, capable of capturing valuable compounds from food-industry wastewate
 rs\, reducing waste\, and contributing to circular bioeconomy strategies f
 or future food systems. A challenging and multifaceted question is whether
  duckweed grown on food-grade waste can be considered fit for human food c
 onsumption.\n\nhttps://indico.unina.it/event/117/contributions/2929/
LOCATION:Department of Agricultural Sciences of the University of Napoli F
 ederico II\, Portici\, Italy Sala Cinese
URL:https://indico.unina.it/event/117/contributions/2929/
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