The invention relates to a method of treating
saline industrial
wastewater, comprising the steps of (1) pretreating, to be specific, delivering
wastewater into a filter tank to remove suspended matters; (2) ultrafiltering, to be specific, delivering the
wastewater of step (1) into an
external pressure ultrafiltration system to perform ultrafiltering; (3) performing
reverse osmosis, to be specific,delivering the wastewater of step (2) to a
reverse osmosis system, and removing salt; (4), performing stripping, to be specific, delivering the
produced water of
reverse osmosis of step (3) into a stripping column, performing stripping, and adjusting pH to meet reuse needs. The method has the advantages that a multistage
quartz sand filter tank can be used to effectively remove suspended matterswith blockage rarely occurring; the
external pressure ultrafiltration system used herein has good applicability and is available for full-flow
filtration;
ultrafiltration membranes are of hollow
fiber, having good strength, backflushing is more thorough, and the membranes can restore their performance well; BW30XFR-400 / 34i or PROC10 reverse
osmosis membrane components can provide high salt removalrate, reaching 98% and above, and the comprehensive
recovery rate of wastewater is high, reaching 85% and above.