Solid-Liquid-separation: Separation takes place in a flotation unit and in a belt filter press. The manure is separated into a solid and a liquid fraction. A flocculant is added. In the flotation system, small air bubbles bring particles to the surface of the tank where it forms a layer of sludge. This layer is scraped off and de-watered in the belt filter press into a solid fraction of 30% dry matter (DM).
Reverse Osmosis (RO): A RO processes the liquid fraction (1,7% DM) into a retentate concentrated-N/K2O product (3,4% DM) and a permeate product to be processed in the clean water production.
Evaporator/ Stripper/ Scrubber (ESS): The RO-concentrate or thin fraction will be further de-watered in an evaporator. The liquid passes through a falling film evaporator with mechanical vapour recompression. Heating the liquid in the evaporator causes water to evaporate. A vacuum lowers the boiling point, less energy is needed than when evaporating at normal atmospheric pressure. The ammonia in the incoming liquid is removed from the product flow by stripping and concentration into NH3-water (14% N). The evaporator further produces a Potassium concentrate (25% DM), ammonium sulphate by scrubbing the vapour coming out of the evaporator. And condensate.
Clean water production (RO-IE): The condensate from ESS unit and the permeate from the RO is cleaned in the RO water polisher and the ion exchanger to achieve the right quality for discharge into surface waters.
Basic information
- Name: VP-Hobe
- Contact: Roel Keursten
- Vendor website
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Technologie zur N-Rückgewinnung als Mineralkonzentrat, Ammoniakwasser und Ammoniumsulfat aus Gülle/Gärrest durch das VP-Hobe-Gülle- und Gärrest-Valorisierungssystem
Abstract:
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Technologie de récupération d’azote sous forme de concentré minéral, de solution aqueuse d’ammoniac et de sulfate d’ammonium à partir d’effluents d’animaux et de digestat via le système de valorisation de ces matières premières VP-Hobe
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Tecnología para la recuperación de N en forma de concentrado mineral, agua de amoníaco y sulfato de amonio procedente del sistema VP-Hobe de valorización de estiércol y digestato
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Tecnologia per il recupero di N come concentrato minerale, ammoniaca liquida e solfato ammonico a partire da letame/digestato mediante il sistema VP-Hobe di valorizzazione del letame e del digestato
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Technologie voor N-recuperatie uit mest/digestaat als mineralenconcentraat, ammoniakwater en ammoniumsulfaat door het VP-Hobe mest- en digestaatvalorisatiesysteem (ID: 669)
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Technologia odzyskiwania azotu w postaci koncentratu mineralnego, wody amoniakalnej i siarczanu amonu z obornika / pofermentu przez system waloryzacji obornika i pofermentu VP-Hobe
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Technológia ásványi koncentrátumként, ammónia-víz és ammónium-szulfát, történő N kinyerésre VP-Hobe trágya és emésztett anyag valorizációs rendszerrel.
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