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Electrifying biotrickling filters for the treatment of aquaponics wastewater

This work aimed to study the electrification of biotrickling filters by means of Microbial electrochemical technologies (MET) to develop an easy-to-assemble and easy-to-use MET for nitrogen removal without external aeration nor addition of chemicals. Four different designs were tested. The highest ammonium and nitrate removal rates (94 gN·m−3·d−1 and 43 gN·m−3·d−1, respectively) were reached by combining an aerobic zone with an electrified anoxic zone. The standards of effluent quality suitable for hydroponics were met at low energy cost (8.3 × 10−2 kWh·gN−1). Electrified biotrickling filters are a promising alternative for aquaponics and a potential treatment for organic carbon-deficient ammonium-contaminated waters.

Additional Info

  • Year: 2021
  • Authors: Pous N., Korth B., Osset-Álvarez M., Balaguer M.D., Harnisch F., Puig S.
  • Reference: Bioresource Technology, Open Access, Volume 319, January 2021, Article number 124221

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