| Fish tank | Biofilter | Sump | Hydroponic table | RFS inflow | RFS outflow | Anaerobic digester |
---|---|---|---|---|---|---|---|
Temp [°C] | 26.9 ± 0.2ab | 27.9 ± 0.3a | 25.7 ± 0.5ab | 25.1 ± 0.5b | 25.4 ± 0.6b | 24.9 ± 0.6b | 26.1 ± 1.1ab |
pH [−] | 7.20 ± 0.03ab | 7.33 ± 0.07a | 7.27 ± 0.02a | 7.24 ± 0.05a | 7.09 ± 0.03b | 7.08 ± 0.03b | 7.34 ± 0.07a |
EC [μS cm−1] | 1748 ± 65b | 1743 ± 65b | 1731 ± 64b | 1721 ± 68b | 1720 ± 71b | 1716 ± 67b | 2984 ± 42a |
Oxygen [%] | 107.7 ± 3.4a | 99.2 ± 1.5a | 101.9 ± 5.4a | 80.7 ± 6.6b | 41.5 ± 8.5c | 36.1 ± 3.8c | 1.8 ± 0.2d |
Redox [mV] | 105.4 ± 12.5a | 112.9 ± 13.8a | 94.8 ± 13.4a | 99.9 ± 12.9a | 69.1 ± 20.2ab | 86.2 ± 15.7a | − 298.8 ± 8.0b |
TOC [mg L−1] | 46.9 ± 3.6d | 48.1 ± 3.6d | 99.9 ± 4.5c | 39.7 ± 2.0d | 357.6 ± 200.8bc | 131.6 ± 8.5b | 3211.2 ± 258.2a |
TN [mg L−1] | 129.5 ± 9.1bc | 105.5 ± 11.7c | 133.4 ± 7.9bc | 138.9 ± 7.7b | 135.3 ± 8.2ab | 119.2 ± 7.1bc | 613.7 ± 50.3a |
NH4+-N [mg L−1] | 0.23 ± 0.01bc | 0.14 ± 0.03 cd | 0.10 ± 0.01d | 0.08 ± 0.01d | 0.80 ± 0.51b | 0.27 ± 0.07bc | 215.06 ± 18.86a |
NO2−-N [mg L−1] | 0.05 ± 0.01c | 0.06 ± 0.01bc | 0.06 ± 0.01c | 0.02 ± 0.00d | 1.63 ± 0.57a | 1.38 ± 0.39ab | 0.08 ± 0.03 cd |
NO3−-N [mg L−1] | 132.8 ± 11.5bc | 125.4 ± 10.2c | 158.8 ± 4.7ab | 180.9 ± 16.2a | 135.23 ± 12.7abc | 129.4 ± 18.3bc | 0.5 ± 0.0d |
Ca2+ [mg L−1] | 94.4 ± 4.4a | 79.8 ± 3.2ab | 65.6 ± 9.7ab | 63.3 ± 7.7b | 79.7 ± 4.5ab | 81.1 ± 8.2ab | 76.2 ± 4.5ab |
Mg2+ [mg L−1] | 27.1 ± 1.2a | 25.1 ± 0.8a | 20.7 ± 3.4a | 21.9 ± 4.0a | 23.9 ± 1.0a | 23.7 ± 1.6a | 27.2 ± 2.0a |
Na+ [mg L−1] | 207.9 ± 13.4a | 213.1 ± 20.0a | 175.6 ± 33.6a | 149.4 ± 18.5a | 172.5 ± 12.9a | 175.5 ± 12.0a | 164.6 ± 13.8a |
K+ [mg L−1] | 60.9 ± 11.6a | 93.8 ± 25.4a | 70.9 ± 21.4a | 52.9 ± 19.8a | 36.5 ± 4.0a | 55.4 ± 21.7a | 68.7 ± 10.7a |
SO42−-S [mg L−1] | 200.9 ± 42.1a | 196.2 ± 14.9a | 183.8 ± 63.4a | 161.3 ± 59.2a | 195.4 ± 53.2a | 173.6 ± 41.3a | 20.0 ± 0.3b |