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Techno-economic Analysis of Concentration Technologies for the Treatment and Recycling of Industrial Wastewater Effluents

Micari, Marina and Moser, Massimo and Cipollina, Andrea and Tamburini, Alessandro and Casas, Sandra and Martinez, M. and Farnos, Joan and Bertsch, Valentin and Micale, Giorgio (2019) Techno-economic Analysis of Concentration Technologies for the Treatment and Recycling of Industrial Wastewater Effluents. In: 14th SDEWES Conference. 14th SDEWES conference, 1-6 Oct 2019, Dubrovnik, Croatia.

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Abstract

The significant increase of the amount of industrial wastewater effluents produced and disposed into the environment is leading to a severe pollution problem. In order to solve the problem, each industrial effluent may be treated through pretreatment and concentration steps. In this way, the removal of pollutants from the effluent, the recovery of valuable materials and/or the recycling of the solution are feasible. These wastewater treatment steps, however, are energy intensive and therefore need to be analyzed thoroughly. This work is focused on the comparison of different systems to treat the effluent produced by the coal mining industry. The proposed systems present different pre-treatment steps and/or different concentration technologies. In all cases, the solution sent to the concentration phase is concentrated up to saturation to recover water and NaCl salt. In particular, the pre-treatment includes nanofiltration and crystallization, while the concentration step is performed with a multi-effect distillation plant or with the coupling of reverse osmosis and membrane distillation. Finally, every system presents an end crystallizer to produce the crystals of NaCl. The considered systems differ with respect to a number of criteria, such as electricity demand, heat demand and costs. They are compared from an economic point of view via a representative cost, which is the levelized cost of the produced NaCl crystals (Levelized Salt Cost, LSC). The treatment chain which presents three crystallization steps to recover Mg(OH)2, CaSO4 and CaCO3 and a multi-effect distillation unit for the concentration phase ensures simultaneously the highest recovery of NaCl and the highest economic feasibility. Therefore, its levelized cost of salt falls within the typical range of price of high purity NaCl salt and it is lower than the ones of the other systems. In conclusion, the treatment of an effluent coming from coal mining industry is investigated considering different treatment chains. The proposed systems allow for recovering valuable materials, leading to a net reduction of the environmental pollution by the industrial processes, and are competitive with the market values.

Item URL in elib:https://elib.dlr.de/132777/
Document Type:Conference or Workshop Item (Speech)
Title:Techno-economic Analysis of Concentration Technologies for the Treatment and Recycling of Industrial Wastewater Effluents
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Micari, MarinaMarina.Micari (at) dlr.deUNSPECIFIED
Moser, MassimoMassimo.Moser (at) dlr.deUNSPECIFIED
Cipollina, AndreaUniversity of PalermoUNSPECIFIED
Tamburini, AlessandroUniversity of PalermoUNSPECIFIED
Casas, SandraEURECATUNSPECIFIED
Martinez, M.EURECATUNSPECIFIED
Farnos, JoanEURECATUNSPECIFIED
Bertsch, ValentinUniversity of BochumUNSPECIFIED
Micale, GiorgioUniversity of PalermoUNSPECIFIED
Date:2019
Journal or Publication Title:14th SDEWES Conference
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Wastewater effluents, Coal mine, Treatment process, Materials recovery, Techno-economic analysis
Event Title:14th SDEWES conference
Event Location:Dubrovnik, Croatia
Event Type:international Conference
Event Dates:1-6 Oct 2019
HGF - Research field:Energy
HGF - Program:Technology, Innovation and Society
HGF - Program Themes:Renewable Energy and Material Resources for Sustainable Futures - Integrating at Different Scales
DLR - Research area:Energy
DLR - Program:E SY - Energy Systems Analysis
DLR - Research theme (Project):E - Systems Analysis and Technology Assessment
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Energy Systems Analysis
Deposited By: Micari, Marina
Deposited On:16 Dec 2019 15:20
Last Modified:16 Dec 2019 15:20

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