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METHOD AND SYSTEM FOR THE CRYSTALLISATION OF STRUVITE FOR RECOVERING PHOSPHATES IN WASTEWATER
METHOD AND SYSTEM FOR THE CRYSTALLISATION OF STRUVITE FOR RECOVERING PHOSPHATES IN WASTEWATER
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机译:用于回收废水中磷酸盐的鸟粪石的结晶方法和系统
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摘要
The invention relates to a method and a system for the crystallisation of struvite in order to recover phosphates in urban or industrial wastewater preferably having phosphate concentrations higher than 50 mg P/L, more preferably higher than 100 mg P/L, where phosphates are recovered by means of the crystallisation thereof in the form of struvite granules, the diameter of which can reach up to 5 mm. The struvite crystallisation systen is formed by a crystalliser (1), a decanter (2) with a distribution system (9), and a unit for adding industrial magnesium hydroxide (3). The phosphates are recovered from the wastewater as a result of two steps : a step of growing struvite granules, and a step of growing fine struvite crystals.
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机译:本发明涉及鸟粪石结晶的方法和系统,以回收城市或工业废水中的磷酸盐,磷酸盐的浓度优选高于50mg P / L,更优选高于100mg P / L,其中磷酸盐被回收通过以鸟粪石颗粒形式结晶,其直径可以达到5mm。鸟粪石结晶系统由结晶器(1),具有分配系统(9)的倾析器(2)和用于添加工业氢氧化镁的单元(3)形成。通过两个步骤可从废水中回收磷酸盐:生长鸟粪石颗粒的步骤和生长精细鸟粪石晶体的步骤。
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