UNS: Selection of Granules in Activated Sludge for Nutrient Removal and Phosphorus Recovery

1510665 Stensel该研究项目融合了废水管理中的两个主要需求，磷的回收和再利用，所有生命的不可再生的基本元素，以及氮和磷去除的需要，以保护地表水质量，在好氧颗粒污泥中的显着发展，提供了许多优势，而不是旧的更成熟的絮凝活性污泥法。研究目标是围绕颗粒污泥的评价，以促进现有的活性污泥设施改造为颗粒污泥，以提高磷的生物去除的两个工艺设计创新。这项工作是变革性的，因为它是一种完全不同的方法来改善传统生物工艺应用的营养物去除，同时提供具有成本效益的磷回收和可持续的工程方法。该项目将在食品生产和经济领域造福社会，通过提供磷回收再利用在一个直接的地区，并提供一种手段，以减缓长期耗尽的磷储量。关键的研究需求是有关的工艺条件，选择颗粒污泥和影响颗粒污泥的微生物和物理特性。主要具体目标如下：1）测试关于如何在改造设计中选择和保持颗粒状增强的磷生物去除污泥的假设，2）确定所产生的颗粒状污泥的微生物生态学和长期完整性，第三章确定相对和非偶联絮凝剂和颗粒污泥固体停留时间和溶解氧控制策略对其微生物种群磷和氮的影响去除能力，和4）确定在废污泥磷汽提槽中可能的磷释放速率和可达到的磷浓度。为了实现这些目标，实验室反应器将被设计和运行，以模拟颗粒污泥系统的磷去除和使用颗粒污泥在活性污泥生物营养物去除系统改造。将使用基础分子生物学技术来评估颗粒污泥微生物种群，并使用显微镜和其他物理测试方法来评估颗粒的大小、密度和强度。将获得强化生物除磷、硝化和反硝化的工艺性能数据。拟议的项目对于吸引代表性不足的学生和女学生从事工程职业，为公众解决供水、环境保护和资源回收等重要问题具有重要意义。该项目通过与EPA营养管理中心和水环境研究基金会的合作，将向包括设计工程师、监管机构和公用事业公司在内的更广泛的受众推广新的成本效益高的技术。该项目的一个非常重要的影响是为回收磷提供了更大的机会，磷是所有生命的有限和基本元素。

1510665StenselThis research project merges two major needs in wastewater management, the recovery and reuse of phosphorus, a nonrenewable essential element for all life, and the need for nitrogen and phosphorus removal to protect surface water quality, with a dramatic development in aerobic granular sludge that offers many advantages over the older more established flocculent activated sludge process. The research objectives are centered around the evaluation of granular sludge to be developed in two process design innovations that facilitate enhanced phosphorus biological removal by retrofitting of existing activated sludge facilities to granular sludge. The work is transformative in that it is a totally different approach to improve nutrient removal of conventional biological process applications while providing a cost effective phosphorus recovery and a sustainable engineering approach. The project will benefit society in the area of food production and economics by providing phosphorus recovery for reuse in an immediate area and to provide a means to slow down the long-term depletion of phosphorus reserves.The key research needs are related to process conditions that select for granular sludge and affect the granular sludge microbial and physical characteristics. Key specific objectives are as follows: 1) test hypotheses on how to select and maintain granular enhanced phosphorus biological removal sludge in the retrofit designs, 2) determine the microbial ecology and long term integrity of granular sludge produced, 3) determine the effect of the relative and uncoupled flocculent and granular sludge solids retention times and dissolved oxygen control strategy on their microbial populations phosphorus and nitrogen removal abilities, and, 4) determine the rate of phosphorus release and attainable phosphorus concentration possible in a waste sludge phosphorus stripping tank. To meet these objectives laboratory reactors will be designed and operated to simulate a granular sludge system for phosphorus removal only and the use of granular sludge in an activated sludge biological nutrient removal system retrofit. Fundamental molecular biology technique will be used to evaluate the granular sludge microbial populations and microscopic and other physical test methods will be used to assess the granules size, density and strength. Process performance data for enhanced phosphorus biological removal, nitrification, and denitrification will be obtained. The proposed project will be important for attracting under represented and female students to a career in engineering with interest in solving important issues of water supply, environmental protection and resource recovery for the public. The project through collaboration with an EPA nutrient management center and the Water Environment Research Foundation will advance new cost effective technology to a wider audience including design engineers, regulators and utilities. A very important impact of the project is in providing a greater opportunity for recovery of phosphorus, a finite and essential element for all life.