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首页> 外文会议>Membrane technology 2008 >BALANCING NUTRIENTS IN A REUSE WORLD
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BALANCING NUTRIENTS IN A REUSE WORLD

机译：重用世界中的营养平衡

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The Western Corridor Recycled Water Project (WCRWP) in Queensland will reclaim waterrnfrom municipal effluent for reuse to reduce demand by industrial users of current sources andrnpossibly also to replenish source water. A total of three AWTPs will be constructed to treatrnsecondary effluent from six wastewater treatment plants to provide an ultimate reuse waterrnsupply of 310 MLD. The first project, Bundamba-A, went into service in September 2007rnwith an initial capacity of 20 MLD. The second phase, Bundamba-B will go into service inrnmid 2008 to provide an additional 40 MLD. The liquid stream process will consist ofrnmicrofiltration, reverse osmosis and advanced oxidation using UV- peroxide. Unique to thisrnproject is treatment of the reverse osmosis waste stream to remove nitrogen and phosphorusrnprior to discharge to a brackish river. In addition, high levels of ortho phosphorus canrnadversely impact the RO operation due to scaling. Several nutrient reduction alternativesrnwere considered to determine the preferred location for nutrient reduction. Thernrecommended plan included pre-treatment of the AWTP feed water to reduce orthornphosphates to a concentration that would not result in scaling of the RO units and wouldrnminimize the quantity of phosphorus removal required in the ROC to meet the dischargernpermit. A storage basin will provide equalization of the ROC prior to chemical/physicalrntreatment for phosphorus removal in a high rate solids contact clarification process.rnChemical feed to the solids contact clarifiers will include bisulfite for dechlorination, causticrnfor alkalinity and pH control, and ferric chloride and polymer for coagulation and chemicalrnprecipitation of phosphorus. Deep bed denitrification filters will provide nitrate removalrnusing methanol as a carbon source.
机译：昆士兰州的西部走廊循环水项目（WCRWP）将回收市政废水中的水，以供再利用，以减少工业用户对当前水源的需求，也可能补充水源。总共将建造三个污水处理厂，以处理来自六个废水处理厂的二次废水，从而提供310 MLD的最终再利用供水。第一个项目Bundamba-A于2007年9月投入运行，初期产能为20 MLD。第二阶段，Bundamba-B将于2008年中投入使用，以提供额外的40个MLD。液流过程将包括微滤，反渗透和使用UV-过氧化物进行的高级氧化。该项目的独特之处在于处理反渗透废水以除去氮和磷，然后排入微咸河。另外，由于结垢，高含量的正磷会不利地影响反渗透操作。考虑了几种减少营养物的替代方案，以确定减少营养物的首选位置。推荐的计划包括对AWTP进水进行预处理，以将原磷酸盐还原至不会导致RO装置结垢的浓度，并且将最大限度地降低ROC中为达到排放许可所要求的除磷量。储存池将在化学/物理处理之前的ROC均等化，以高速率固体接触澄清过程中的除磷。固体接触澄清器的化学进料包括亚硫酸氢盐用于脱氯，苛性碱用于碱度和pH控制，氯化铁和聚合物用于磷的凝结和化学沉淀。深床反硝化过滤器将使用甲醇作为碳源来去除硝酸盐。

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