Autotrophic nitrogen removal for decentralized treatment of ammonia-rich industrial textile wastewater: process assessme
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SELECTED CASE STUDIES ON THE ENVIRONMENT OF THE MEDITERRANEAN AND SURROUNDING REGIONS
Autotrophic nitrogen removal for decentralized treatment of ammonia-rich industrial textile wastewater: process assessment, stabilization and modelling Simone Visigalli 1 & Andrea Turolla 1 & Giacomo Bellandi 2 & Micol Bellucci 1 & Elisa Clagnan 3 & Lorenzo Brusetti 3 & Mingsheng Jia 1 & Roberto Di Cosmo 4 & Glauco Menin 1 & Martina Bargna 5 & Giovanni Bergna 5 & Roberto Canziani 1 Received: 25 May 2020 / Accepted: 11 October 2020 # The Author(s) 2020
Abstract Digital textile printing (DTP) is a game-changer technology that is rapidly expanding worldwide. On the other hand, process wastewater is rich in ammoniacal and organic nitrogen, resulting in relevant issues for discharge into sewer system and treatment in centralized plants. The present research is focused on the assessment of the partial nitritation/anammox process in a singlestage granular sequencing batch reactor for on-site decentralized treatment. The technical feasibility of the process was assessed by treating wastewater from five DTP industries in a laboratory-scale reactor, in one case investigating long-term process stabilization. While experimental results indicated nitrogen removal efficiencies up to about 70%, complying with regulations on discharge in sewer system, these data were used as input for process modelling, whose successful parameter calibration was carried out. The model was applied to the simulation of two scenarios: (i) the current situation of a DTP company, in which wastewater is discharged into the sewer system and treated in a centralized plant, (ii) the modified situation in which on-site decentralized treatment for DTP wastewater is implemented. The second scenario resulted in significant improvements, including reduced energy consumption (− 15%), reduced greenhouse gases emission, elimination of external carbon source for completing denitrification at centralized WWTP and reduced sludge production (− 25%). Keywords Industrial wastewater . Decentralized treatment . Deammonification . Biological processes . PN/anammox process . Process scale-up
Introduction Responsible Editor: Weiming Zhang Electronic supplementary material The online version of this article (https://doi.org/10.1007/s11356-020-11231-y) contains supplementary material, which is available to authorized users. * Roberto Canziani [email protected] 1
Department of Civil and Environmental engineering – Environmental section, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milan, Italy
2
AM-TEAM, Oktrooiplein 1, 9000 Ghent, Belgium
3
Faculty of Science and Technology, Free University of Bolzano, Piazza Università 1, 39100 Bolzano, Italy
4
Gruppo CAP, Via del Mulino 2, 20090 Assago, Italy
5
Lariana Depur, Via Laghetto 1, 22073 Fino Mornasco, Italy
Digital (or ink-jet) textile printing (DTP) is rapidly spreading worldwide, mostly due to the greater versatility with respect to conventional printing techniques (Global Industry Analysts 2018). Despite lowe
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