Treatment of urban wastewater discharged into Tinh Tam lake using hydrogen peroxide-supplemented aerated biofilter system

A hydrogen peroxide-supplemented aerated biofilter system (ABF-H₂O₂) demonstrates significant potential for treating urban wastewater in heritage sites, achieving high removal efficiencies of 69–81% for chemical oxygen demand and 88–94% for biochemical oxygen demand. The study, conducted on a laboratory-scale reactor over 45 days, also showed that ammonium removal efficiency varied with organic loading rates, peaking at 87% under low-loading conditions but dropping to 27% at higher loads. H₂O₂ supplementation enhanced dissolved oxygen levels, supporting microbial activity and treatment stability. Microscopic analysis revealed a diverse and well-adapted microbial community, including protozoa and metazoa, suggesting the ABF-H₂O₂ approach could serve as a sustainable, decentralized solution for wastewater management in ecologically and historically significant areas like Tinh Tam Lake within Vietnam's Imperial Citadel of Hue.

Dang, T. T. L., & Van Tuan, L. (2025). Treatment of urban wastewater discharged into Tinh Tam lake using hydrogen peroxide-supplemented aerated biofilter system. Hue University Journal of Science: Natural Science, 134(1B), 61–71. https://doi.org/10.26459/hueunijns.v134i1b.7824