| Title: | Novel biotechnologies for nitrogen removal and their coupling with gas emissions abatement in wastewater treatment facilities |
| Author(s): | Chan-Pacheco CR; Valenzuela EI; Cervantes FJ; Quijano G; |
| Address: | "Laboratory for Research on Advanced Processes for Water Treatment, Engineering Institute, Campus Juriquilla, Universidad Nacional Autonoma de Mexico (UNAM), Blvd. Juriquilla 3001, 76230 Queretaro, Mexico. Laboratory for Research on Advanced Processes for Water Treatment, Engineering Institute, Campus Juriquilla, Universidad Nacional Autonoma de Mexico (UNAM), Blvd. Juriquilla 3001, 76230 Queretaro, Mexico. Electronic address: FCervantesC@iingen.unam.mx. Laboratory for Research on Advanced Processes for Water Treatment, Engineering Institute, Campus Juriquilla, Universidad Nacional Autonoma de Mexico (UNAM), Blvd. Juriquilla 3001, 76230 Queretaro, Mexico. Electronic address: GQuijanoG@iingen.unam.mx" |
| DOI: | 10.1016/j.scitotenv.2021.149228 |
| ISSN/ISBN: | 1879-1026 (Electronic) 0048-9697 (Linking) |
| Abstract: | "Wastewaters contaminated with nitrogenous pollutants, derived from anthropogenic activities, have exacerbated our ecosystems sparking environmental problems, such as eutrophication and acidification of water reservoirs, emission of greenhouse gases, death of aquatic organisms, among others. Wastewater treatment facilities (WWTF) combining nitrification and denitrification, and lately partial nitrification coupled to anaerobic ammonium oxidation (anammox), have traditionally been applied for the removal of nitrogen from wastewaters. The present work provides a comprehensive review of the recent biotechnologies developed in which nitrogen-removing processes are relevant for the treatment of both wastewaters and gas emissions. These novel processes include the anammox process with alternative electron acceptors, such as sulfate (sulfammox), ferric iron (feammox), and anodes in microbial electrolysis cells (anodic anammox). New technologies that couple nitrate/nitrite reduction with the oxidation of methane, H(2)S, volatile methyl siloxanes, and other volatile organic compounds are also described. The potential of these processes for (i) minimizing greenhouse gas emissions from WWTF, (ii) biogas purification, and (iii) air pollution control is critically discussed considering the factors that might trigger N(2)O release during nitrate/nitrite reduction. Moreover, this review provides a discussion on the main challenges to tackle towards the consolidation of these novel biotechnologies" |
| Keywords: | *Ammonium Compounds Anaerobiosis Bioreactors Biotechnology Denitrification Ecosystem Nitrogen Oxidation-Reduction Wastewater *Water Purification Anaerobic ammonium oxidation Feammox Gas emissions Nitrogen removal Sulfammox Wastewater treatment; |
| Notes: | "MedlineChan-Pacheco, Carlos R Valenzuela, Edgardo I Cervantes, Francisco J Quijano, Guillermo eng Review Netherlands 2021/08/05 Sci Total Environ. 2021 Nov 25; 797:149228. doi: 10.1016/j.scitotenv.2021.149228. Epub 2021 Jul 22" |
