The zero-liquid-discharge (ZLD) approach is a clean technology for valorizing low-salinity brines such as seawater using desalination reverse-osmosis (RO) plants. A key aspect is calcium removal and recovery to avoid scaling problems in successive advanced separation units for recovering other valuable salts. Most current technology relies on discarding some salts while recovering others. In this paper, a systematic process is proposed by which all the salts of sodium, calcium, magnesium, strontium, and lithium can be recovered in their highest purity from produced-water brines from oil wells with very high salinity.
Problem Statement
While current wastewater-reclamation and -minimization technologies are effective, they demand high energy consumption.
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