I suggest you remove as much ...

Published September 13, 2019 16:38 by Peter Naylor, Operations and Maintenance Manager

I suggest you remove as much P as possible biologically and then trim with ferric downstream. If you dose ferric upstream at the headworks a significant proportion will react with sulphide and form insoluble iron sulphide, which may block your MBR. Any ferric consumed reacting with sulphide will be also be lost to phosphate removal and cost you more money. With a conventional SBR system I normally achieve 80% phosphate removal biologically.

3 Comments

That’s great info. Thanks. I’ve looked into it further and you are 100% correct

Published September 19, 2019 01:49 by Fernando Mata, Wastewater Operations Superintendent at City of Redlands

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I don't have a lot of experience in this area but we took this approach when implementing this in an SBR. The idea was that biological P removal was 'free' and that we didn't want to remove too much P too early on as we could run the risk of the biomass growth being limited by P.

Published September 16, 2019 03:02 by Daniel Couton, Process and Environmental Chemist

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Any inputs on methods of Biological removal of P ? Using constructed wetlands works only if there is sufficient land area and seasonal temperatures permit plant growth.

Published September 13, 2019 17:53 by Amartya Saha, Associate Scientist at Florida International University

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