公开(公告)号：US4477355A

公开(公告)日：1984-10-16

申请号：US480526

申请日：1983-03-30

Applicant: Lorenzo Liberti ,  Gianfranco Boari ,  Roberto Passino

Inventor： Lorenzo Liberti ,  Gianfranco Boari ,  Roberto Passino

IPC: B01J39/00 ,  B01J49/00 ,  C02F1/42

CPC classification number: B01J49/0017 ,  B01J39/00 ,  Y10S210/906

Abstract: A method for removing and recovering ammonium and/or potassium and/or phosphate ions from wastewater is presented which comprises:permitting said wastewater to pass through at least one bed of ion-exchange resins capable of removing selectively those nutrient ionsregenerating those ion-exchange resins with a Na Cl solution or other suitable regenerant solutions so that said nutrient ions may be obtained in a much more concentrated formadding to said regeneration eluates (or, eventually, directly to wastewater) at least one Mg salt, in proper pH conditions so as to precipitate hydrous MgNH.sub.4 PO.sub.4 and/or MgKPO.sub.4, slightly soluble salts of great agronomic value.

Abstract translation: 提出了一种从废水中除去和回收铵和/或钾和/或磷酸根离子的方法，其包括：允许所述废水通过至少一个离子交换树脂床，该离子交换树脂能够选择性地除去再生这些离子交换的那些营养离子 树脂与NaCl溶液或其他合适的再生剂溶液，使得所述营养离子可以以更加浓缩的形式获得，在合适的pH条件下，将所述再生洗脱物（或最终直接转化为废水）添加至少一种Mg盐，从而 为了沉淀含水MgNH4PO4和/或MgKPO4，具有很大农学价值的微溶盐。