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Spent Wash - High Calcium and Phosphorus removal (Read 170 times)

Ziggy YaBB Newbies Offline Posts: 4 Gender: Company or Organization: A.Water	Spent Wash - High Calcium and Phosphorus removal Jun 27^th, 2012, 6:49am Hi, we are trying to find the treatment solution for distillery spent wash containing high level of Ca up tp 2000mg/l and Total P up to 1000 mg/l. Any suggestions? Thank you.
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aquaticonsult

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Re: Spent Wash - High Calcium and Phosphorus removal
Reply #1 - Jun 27^th, 2012, 10:37am

electrolytic oxidation normally will precipitate about 95% of the phosphate and 60-70% of the calcium. Based on the calcium - I gather pH i above neutral - so lanthamun, alum or cerium will capture phosphate as a floc and can be removed via filtration also. To cut chemical use, I'd electrolytic oxidize; filter then does and filter again.

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Ziggy YaBB Newbies Offline Posts: 4 Gender: Company or Organization: A.Water	Re: Spent Wash - High Calcium and Phosphorus removal Reply #2 - Jun 28^th, 2012, 3:39am Thank you aquaticonsult for advice. The pH despite high calcium level is around 4.5. We tried to rise the pH with Lime to 6.4 and Caustic Soda to 9.0 and then treat it various polyelectrolytes, but results are very incosistent. Would electrolytic oxidation work with low pH as well? Thank you.
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aquaticonsult Senior Member Offline WaterandWastewa ter.Com is the best! Posts: 490 Company or Organization: Aquatic Technologies	Re: Spent Wash - High Calcium and Phosphorus removal Reply #3 - Jun 28^th, 2012, 10:45am Yes - the lower pH as noted here - would not prevent the oxidation (thus reductions) from occurring.
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