ANAEROBIC REACTOR/ANAEROBIC BIOFILTER (AR/ABF) SYSTEM + CONSTRUCTED WETLAND VERTICAL FLOW WITH SATURATED SUPPORT (CWVF-SS) IN URBAN WASTEWATER TREATMENT

Authors

• Gabriela Caroline Kroth Universidade de Santa Cruz do Sul
• Ênio Leandro Machado Universidade de Santa Cruz do Sul
• Igor Ricardo Conrad Universidade de Santa Cruz do Sul
• Deison Antônio Taufer Fochi Universidade de Santa Cruz do Sul
• Letícia Mesacasa Universidade de Santa Cruz do Sul
• Fábio Oliveira Universidade de Santa Cruz do Sul
• Daniel Brinckmann Teixiera Universidade de Santa Cruz do Sul
• Adriane Lawish Rodriguez Universidade de Santa Cruz do Sul
• Carlos Alexandre Lutterbeck Universidade de Santa Cruz do Sul

DOI:

https://doi.org/10.17058/rjp.v13i1.18538

Keywords:

Nature-based solutions, Eutrophic load, Dissolved oxygen depletion

Abstract

The integrated RA/BFA + WCFV-FS system is one of the proposals that integrate the so-called nature-based solutions (SBN) for basic sanitation. In this work, this system was monitored for 5 months, considering the first half of 2022, with the wetland constructed from vertical flow with saturated bottom (WCFV-FS) with the macrophytes Hymenachne grumosa (Nees) Zuloaga, Canna indica and Helicônia velloziana, useful volume from approx. 450 L, pulse feeding of 70 L for 5 min, adding 4 pulses a day at 6-hour intervals. The system support was 70 cm high of gravel 1 (30 cm) and 2 (30 cm) and 10 cm of pebbles.The loading factors were a maximum of 18.66 g of BOD₅ m^-2 day^-1 and 2.7 g of N-NH₄⁺ m^-2 day^-1. The samples had weekly characterization of the parameters dissolved oxygen, total dissolved solids (TDS), conductivity, turbidity, N-NH₄⁺, pH, BOD₅ and apparent color at 420 nm. The reductions were between 50-75% of the eutrophicant and dissolved oxygen depressant parameters, with the treatment system having an operating time of 5 years.

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