Integrating membrane aerated biofilm reactors with biological nitrogen removal processes: A new paradigm for achieving sustainable wastewater treatment plants

How to Provide Nitrite Robustly for Anaerobic Ammonium Oxidation in Mainstream Nitrogen Removal

“…First, the oxygen supply needs to be linked to the biological activity (especially for AOMs), and the imbalance of the oxygen supply and depletion may stimulate NOB activity . Also, the uncontrollable biomass retention time in microbial aggregates will intensify the difficulty of segregating AOB and NOB in a long-term operation, i.e., NOB cannot be effectively washed out promptly. Besides, some other stressful means (such as FA, FNA) should be performed for avoiding the recovery of NOB activity caused by their tolerance to oxygen-limiting conditions …”

“…Previous reviews have focused more on the technical status and challenges in the application of mainstream anammox, such as novel anammox-based processes, ,,,− the interactions of AnAOB with nitrifiers and denitrifiers, ,− and the divergent NOB suppression methods. ,,,− Considering that the available and steady nitrite accumulation hinders the practical mainstream application of anammox, we aim to provide a comprehensive work presenting a state-of-the-art review of the recent advances in novel NOB suppression strategies and emerging routes for nitrite supply. First, we address that the unstable nitrite supply is still the main bottleneck constraining the application of anammox in mainstream.…”

Enhanced Removal of Dissolved Effluent Organic Matter in Wastewater Using Lignin-Based Biochar Supported Fe–Cu Bimetallic Oxide Catalyst

“…Due to the rapid population growth and industrial development, massive wastewater treatment plants have been constructed to treat the increasing discharge of wastewater around the world, most of which use biological treatment processes [1,2]. The secondary effluent after biological treatment usually contains soluble microbial products (SMP), natural organic matter (NOM), as well as the heterogeneous mixtures of synthetic organic constituents and their intermediates [3].…”

“…To fill the knowledge gap, an alkali lignin-based BC-supported Fe-Cu bimetallic oxide was prepared by pyrolysis and used to solve the problem of disinfection by-products produced by humic acid (HA)-the main component of SMP-during chlorine disinfection. The main objectives of this study are: (1) to prepare and screen the appropriate FeCu@BC catalyst with the excellent HA removal performance; (2) to explore the mechanism used by the alkali lignin-based BC-supported FeCu@BC catalyst for the removal of HA using density functional theory (DFT); (3) to investigate the generation of chlorinated disinfection by-products before and after treatment by the alkali lignin-based BC-supported FeCu@BC catalyst. The finding of this study can provide a new way to reduce the production of DBPs in the effluent of wastewater treatment plants.…”

Editorial: Sustainable nitrogen removal in emerging pollutant contaminated wastewater: technology, application and risk assessment

“…The large-scale release of nitrogen compounds is a major factor for water eutrophication (Li et al, 2023 ). Traditionally, nitrogen is removed through nitrification and denitrification processes, which leads to external organic carbon addition, high energy consumption, large sludge generation and greenhouse gases emissions (Wu et al, 2023 ).…”