
Ammonia inhibition is a common issue encountered in anaerobic digestion (AD) when treating nitrogen-rich substrates. This study proposed a novel approach, the electrodialysis-integrated AD (ADED) system, for in-situ recovery of ammonium (NH4+) while simultaneously enhancing AD performance. The ADED reactor was operated at two different NH4+-N concentrations (5,000 mg/L and 10,000 mg/L) to evaluate its performance against a conventional AD reactor. The results indicate that the ADED technology effectively reduced the NH4+-N concentration to below 2,000 mg/L, achieving this with a competitive energy consumption. Moreover, the ADED reactor demonstrated a 1.43-fold improvement in methane production when the influent NH4+-N was 5,000 mg/L, and it effectively prevented complete inhibition of methane production at the influent NH4+-N of 10,000 mg/L. The life cycle impact assessment reveals that ADED technology offers a more environmentally friendly alternative by recovering valuable fertilizer from the AD system.
Ammonium inhibition, Nutrient recovery, Bioreactors, Ammonia, Anaerobic digestion, Ammonium Compounds, Electrodialysis, Anaerobiosis, Methane, Dialysis
Ammonium inhibition, Nutrient recovery, Bioreactors, Ammonia, Anaerobic digestion, Ammonium Compounds, Electrodialysis, Anaerobiosis, Methane, Dialysis
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