Hormone parameter 11-KT Testosterone High exchange Low exchange High exchange Low exchange Biofilter removal efficiency (%) 34.2 31.9 14.5 1.30 WRAS production (mg/day) 0.156 0.128 0.186 0.025 Overall biomass production (μg/kg/day) 0.36 0.31 0.43 0.06

Table 4: Androgen production and removal characteristics within high and low exchange WRAS treatment groups.

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