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City of Plantation's Indirect Potable Reuse Pilot Project: Approaches to Meeting Extreme Nutrient Limits 种植园城市的间接饮用水再利用试点项目:满足极端营养限制的方法
发布日期: 2009-11-01
本powerpoint演示文稿首先简要概述了佛罗里达州种植园市寻找替代水源的情况。在考虑了几种替代策略后,种植园决定采用间接饮用水再利用- 含水层补给,需要考虑几个重要因素,包括:营养控制;水生生物影响;微量成分;补给建模;持续性;公众外联;还有,成本。介绍了该种植园中试厂的膜生物反应器(MBR)和常规处理方案,包括:去除土壤中的总氮(TN)和总磷(TP) MBR和反渗透(RO)中试装置;以及去除废水中的总氮和总磷 深床过滤器和反渗透先导装置。 关于营养物去除的陈述结论包括: 两名飞行员都达到了严格的总氮和总磷限制; RO膜必须满足TP限制;和 单独使用膜(UF/RO),不添加化学添加剂 总氮和总磷限值。介绍了反渗透膜去除微生物的方法,以及对水生生物的毒性。演示摘要包括以下内容:飞行员被证明符合严格的营养要求 不同试验条件下的限值; 反渗透膜对地表水是必要的 由于严格的TP限制而排放;几乎所有的微量成分都被去除了 反渗透系统; RO渗透液可能有毒、重新稳定/重新矿化 是必要的;和 观察到的对水生生物的毒性很可能 由氯胺引起。 其他形式的反渗透预处理 应该进行评估。包括数字。
This powerpoint presentation begins by providing a brief overview of the City of Plantation, Florida's search for alternative water sources. After considering several alternative strategies, Plantation decided on indirect potable reuse - aquifer recharge, which required consideration of several important factors including: nutrient control; aquatic organism impact; micro-constituents; recharge modeling; sustainability; public outreach; and, cost. The Plantation pilot plant is presented with information concerning it's membrane bioreactors (MBR) and conventional treatment schemes including: total nitrogen (TN) and total phosphorus (TP) removal of MBR and reverse osmosis (RO) Pilot Units; and, TN and TP removal of Deep Bed Filter and RO Pilot Units. Presentation conclusions concerning nutrient removal include: both pilots met stringent TN and TP limits; RO membranes are necessary to meet TP limit; and, membranes alone (UF/RO) with no chemical addition met TN and TP limits. Micro-constituent removal by RO membranes is presented, along with toxicity to aquatic organisms. Presentation summary includes the following: the pilot demonstrated to meet stringent nutrient limits at different test conditions; RO membranes are necessary for surface water discharge due to stringent TP limits; almost all micro-constituents were removed by RO system; RO permeate could be toxic, re-stabilization/re-mineralization is necessary; and, the observed toxicity to aquatic organisms was likely caused by chloramines. Other forms of RO pretreatment should be evaluated. Includes figures.
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发布单位或类别: 美国-美国给水工程协会
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