Integration of membrane distillation as volume reduction technology for in-land desalination brines management: Pre-treatments and scaling limitations

نویسندگان

چکیده

Management of in-land reverse osmosis (RO) desalination brines generated from surface brackish waters is a current challenge. Among the different near-Zero and Zero Liquid Discharge (ZLD) alternatives, Membrane Distillation (MD), in which transport water thermally driven, appears as an attractive technology if residual heat source available. The aim this study was to identify limits Direct Contact MD (DCMD) pre-treatments such acidification aeration, or combination both quantify scaling reduction potential when treating RO brine water. Experimental data were used evaluate effectiveness DCMD achieve highest concentration factors, depending on chosen pre-treatment. Additionally, economic analysis operational cost, taking case site where management discharge sea, also carried out. Results showed that enhanced performance by increasing factor achieved volume reductions (about 3 times) reached with aeration pre-treatments. Both processes reduced precipitation CaCO3(s) reducing total inorganic carbon (>90%); however, CaSO4·2H2O(s) precipitated. indicated even waste available, disposal into sea cheapest option, while ZLD alternatives not regulatory framework since their cost higher than sea. Other options related Minimal may be more economically attractive.

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ژورنال

عنوان ژورنال: Journal of Environmental Management

سال: 2021

ISSN: ['0301-4797', '1095-8630']

DOI: https://doi.org/10.1016/j.jenvman.2021.112549