Process Flow TerraNova@ UItra with integral Phosphorous-Recovery The process flow diagram shows the TerraNova® Ultra process with integral Phosphorous recovery steps. The dotted parts (bottom left and right) are being added to the standard process in case Phosphorous recovery is desired. These are: - An acidification step, that decreases the pH level of the HTC slurry below pH2 by means of Sulfuric Acid. This causes a leaching of the Phosphorous from the Fe- or Al components, generated in the upstream waste water treatment process, into the liquid phase. More than 80% of the sewage sludge Phosphorous is being transferred. - A solid dosing step that adds Calcium-Silicate-Hydrate granulates (CSH) to the filtrate that is generated during the slurry dewatering step in the chamber filter press. The dissolved Phosphorous adsorbs at the CSH granulates.
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ProcessFlowTerraNova@UItrawithintegralPhosphorous-Recovery
The process flow diagram shows the TerraNova®Ultra processwith integral Phosphorousrecovery steps. The dotted parts (bottom left and right) are being added to the standardprocessincasePhosphorousrecoveryisdesired.Theseare:-Anacidificationstep,thatdecreasesthepHleveloftheHTCslurrybelowpH2bymeansofSulfuric Acid. This causes a leaching of the Phosphorous from the Fe- or Al components,generatedintheupstreamwastewatertreatmentprocess,intotheliquidphase.Morethan80%ofthesewagesludgePhosphorousisbeingtransferred.-AsoliddosingstepthataddsCalcium-Silicate-Hydrategranulates(CSH)tothefiltratethatisgenerated during the slurry dewatering step in the chamber filter press. The dissolvedPhosphorousadsorbsattheCSHgranulates.
-AdewateringstepfortheseparationofthePhosphorousproduct.ThisproductconsistsofamorphousP-components,HydroxylapatiteandStruviteandshowsagoodplantactivitythatreachesupto80%comparedtoSuperphosphate.
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