Hi Valerie, we do research ...

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Hi Valerie, we do research on what we call wastewater biorefineries (WWBR) - http://www.futurewater.uct.ac.za/FW-WWBR. The top five value added products, like Gary already touched on, are energy, phosphate, cellulose, alginic acid and polyhydroxyalkanoates (info gathered from the IWA Resource Recovery group - http://www.iwa-network.org/groups/resource-recovery-from-water-cluster/.

Our group believes that high value, low volume products like flocculants, industrial enzymes and biopolymers can be produced from wastes, and the remainder can still be committed to nutrients and energy recovery. We recently published a report on this including a range of wastewaters (not just domestic), the report plus appendices are available on that Future Water WWBR weblink.

I have a strong personal preference for the Nereda system for bioproduction, because of the very fast sludge settling time (aka product recovery) and the improved ability to apply selective pressure to the reactor operating conditions to push bioproduction of the desired product. Other good options are moving bed biofilm reactors and modified rotating bed contactors. We do not have import or production licences, we are research level, but the Nereda system is at pilot scale for alginate and PHA production (Dutch tech)

Personally I am interested in products from dry sanitation, and a recent presentation outlining potential products can be found here: http://indiebio.co.za/wp-content/uploads/2017/11/Verster_et_al_29nov17_Peri_Urban_Sanitation_WWBR.pdf