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Recovery of Water from Influent with High Chloride (Read 141 times)

aidi idris

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Recovery of Water from Influent with High Chloride
Apr 04^th, 2012, 9:40pm

I have wastewater from a rubber glove producer and they are looking at recovering their water for process usage. The influent contains high chloride, nitrate, sulphate & sodium. From my experience, RO is definitely needed to get the job done and treat the influent close to tap water standards. But any idea what would be the best pre-treatment to reduce the load on the RO?

The influent quality as follows :
Chloride - 260 mg/L
Nitrate - 700 mg/L
Sodium - 290 mg/L
Sulphate 320 mg/L
Magnesium - 60 mg/L

Any ideas??

AIDI

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grrun God Member Offline WaterandWastewa ter.Com is the best! Posts: 3525 Pekin, IL Gender: Company or Organization: Freelance Environmental Engine	Re: Recovery of Water from Influent with High Chloride Reply #1 - Apr 4^th, 2012, 10:53pm Mg is the most likely to form a precipitate before the other ions. An inline filter may reduce plugging the membranes. You may want to look at : http://www.vsep.com/ grrun
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DrHenry God Member Offline Ride, boldly ride, The shade replied... Posts: 788 Raleigh, NC Company or Organization: CESTAB (see bio)	Re: Recovery of Water from Influent with High Chloride Reply #2 - Apr 5^th, 2012, 1:53pm With RO it is better to have a UF/NF system in front to remove organics and colloidial material that can clog the RO system. It really takes sending samples to a RO supplier for trials. You also have to think about, what are you going to do with the retentates. It can be a large volume.
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