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Reclaimed phosphorus commodity reserve from water resource recovery facilities-A strategic regional concept towards phosphorus recovery

机译：回收磷商品储备从水资源恢复设施 - 磷恢复的战略区域概念

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Despite all the right reasons for phosphorus (P) recovery, many water resource recovery facilities (WRRFs), especially for small WRRFs, cannot afford to implement P recovery technologies. This work systematically evaluated cost impacts of recovering P into fertilizer form from 80 major WRRFs in the Chicagoland area. Using a 20-year present worth analysis, results indicate that it would cost US$21 billion for all 80 major WRRFs to recover P into struvite fertilizer form. Based on unit cost analysis ($ per kg P recovered), P recovery from biosolids is cost-prohibitive due to high energy demand. P recovery from sludge liquor is economically viable but only up to 30% of the influent P load can be recovered. P recovery from sludge ashes is comparable with P recovery from sludge liquor or de-facto P recovery by biosolids land application from a cost perspective but it has the highest P recovery potential (up to 90% of the influent P loads) and lessens the increasing concern of transferring emerging contaminants from biosolids to crops through land application. This leads to a novel approach of a centralized, regional P recovery facility where WRRFs of all sizes can "dispose" of their biosolids for incineration and that P can be recovered as calcium phosphate from the sludge ashes and stored in a monofill as a commodity reserve for future use. This paper proved that the concept of building a commodity P reserve through a centralized P recovery facility is economically justifiable for all WRRFs within the region.
机译：尽管磷（P）恢复的所有原因，许多水资源恢复设施（WRRF），特别是对于小型WRRF而言，不能达到P恢复技术。这项工作系统地评估了从芝加哥地区的80个主要WRRF中回收P肥料形式的成本影响。使用20年的值得分析，结果表明所有80个主要WRRF都将花费210亿美元，以便将P恢复到Struvite肥料形式。基于单位成本分析（每千克P恢复），由于高能量需求，生物溶胶的P恢复是成本抑制的。从污泥液中恢复在经济上可行，但只能回收30％的流水p负载。从污泥灰烬中恢复与从成本透视的生物溶剂土地申请恢复污泥液或除法恢复相当，但它具有最高的P恢复潜力（高达90％的进载P负载）并减少了增加的增加关注通过土地应用将新兴污染物从生物溶剂转移到作物。这导致了一种新的方法的集中区域P恢复设施，其中所有尺寸的WRRF可以“处理”它们的生物溶解剂以焚烧，并且P可以作为来自污泥灰的磷酸钙回收，并作为商品储备储存在单一燃料中未来使用。本文证明，通过集中式P恢复设施构建商品P储备的概念对于该地区内的所有WRRF在经济上是合理的。

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