公开(公告)号：US20080308505A1

公开(公告)日：2008-12-18

申请号：US12047673

申请日：2008-03-13

申请人： Robert Jansen ,  Sebastien Camborieux ,  Genevieve Kenny ,  Richard Tanner ,  Loren Luppes ,  Anthony Baiada ,  John Kerr ,  Timothy Windebank

发明人： Robert Jansen ,  Sebastien Camborieux ,  Genevieve Kenny ,  Richard Tanner ,  Loren Luppes ,  Anthony Baiada ,  John Kerr ,  Timothy Windebank

IPC分类号： B01J20/04

CPC分类号： C02F1/5254 ,  B01D9/004 ,  B01D9/005 ,  C02F2101/105 ,  C02F2101/16 ,  C02F2103/06 ,  C02F2103/32

摘要： We disclose a process for the removal of phosphorous and ammonia from an aqueous stream by contacting the aqueous stream with magnesium and base in a first zone having a first pH, to form an (n−1)th mixed stream and a first portion of struvite; separating the (n−1)th mixed stream from the first portion of struvite; removing at least some struvite from the first portion of struvite; contacting the (n−1)th mixed stream with base in an nth zone, wherein n is an integer incrementing from 2 to nmax, wherein nmax is an integer from 2 to about 5, and wherein the nth zone has an nth pH higher than the (n−1)th pH, to form an nth mixed stream and an nth portion of struvite, except no base is added and the nth pH need not be higher than the (n−1)th pH when n=nmax; separating the nth mixed stream from the nth portion of struvite; returning the nth portion of struvite to the (n−1)th zone; and, if n

摘要翻译： 我们公开了通过在具有第一pH的第一区域中使含水物流与镁和碱接触以形成第（n-1）混合物流和第一部分的鸟粪石来从水流中除去磷和氨的方法 ; 将第（n-1）混合物流与第一部分的鸟粪分离; 从鸟粪的第一部分去除至少一些鸟粪石; 使第（n-1）混合物流与第n区的碱接触，其中n为从2增加至nm 3的整数，其中nmax为2至约5的整数，并且其中第n个区的第n个pH高于 （n-1）pH，形成第n混合物流和第n部分的鸟粪石，除了没有碱，并且当n = nmax时，第n个pH不需要高于第（n-1）个pH; 将第n个混合物流从鸟粪的第n部分分离出来; 将第n部分的鸟粪返回到第（n-1）区; 并且如果n