Collaborative Research: GOALI: Sustainable phosphorus recovery from agricultural waste

1512429 （Blaney）和1511399 （Sengupta）传统上认为废物流是环境系统的污染物来源。由于农业地区径流中的高养分负荷，家禽粪便已成为最近感兴趣的话题。展望未来，需要转变思维模式，从资源回收的角度重新考虑废物流。该项目的总体目标是研究一种混合技术，该技术允许家禽粪便的连续流处理和磷的高回收率。通过将养分负荷问题转化为潜在的资源/收入来源，可以加快减少敏感生态系统养分负荷的进展。这一目标将通过与专注于农业可持续发展的Triea Technologies公司合作来实现。本研究的假设是，磷可以通过两阶段工艺从浓缩的家禽粪便中可持续回收。该工艺包括一个磷提取和回收系统（PEARS），该系统允许磷从家禽粪便中释放并随后作为高价值产品沉淀，以及一个混合离子交换装置，水合氧化铁-聚合物配体交换器（HFO-PLE），该装置抛光PEARS出水以确保低磷出水。该假设将通过以下具体目标的研究来验证：目标1：优化和模拟梨从家禽粪便中生产鸟粪石和鸟粪石钾的工艺化学。目标2：利用浸渍水合氧化铁的特种聚合物配体交换剂，从梨出水中获得额外的磷回收。目的3：确定回收磷产品的纯度，探索提取和再生溶液的可持续再利用。目标4：确定切萨皮克湾流域潜在的营养负荷减少，并为PEARS-HFO-PLE试点制定启动计划。利用家禽粪便生产高价值磷基肥料将是环境农业领域的重要进展。耦合pear和HFO-PLE系统的方法将确保工艺废水具有低磷含量。该项目将利用与迈耶霍夫学者项目的持续关系，该项目主要为非洲裔美国学生提供服务，以吸引和指导本科生进行研究。研究小组将与农民和农业社区合作，描述磷回收的好处。

1512429 (Blaney) and 1511399 (Sengupta) Waste streams have traditionally been considered as a source of pollutants to environmental systems. Poultry litter has been a topic of recent interest due to high nutrient loads in runoff from agricultural areas. Moving forward, a paradigm shift is needed to reconsider waste streams from a resource recovery perspective. The overall aim of this project is to investigate a hybrid technology that allows for continuous-flow treatment of poultry litter and high recovery of phosphorus. By shifting nutrient loading issues into potential resource/revenue streams, progress in reducing nutrient loads to sensitive ecosystems can be accelerated. This goal will be pursued through partnership with Triea Technologies, a company focused on agricultural sustainability.The hypothesis of this research is that phosphorus can be sustainably recovered from concentrated poultry litter slurries using a two-phase process. This process consists of a Phosphorus Extraction and Recovery System (PEARS), which allows for phosphorus release from poultry litter and subsequent precipitation as a high-value product, and a hybrid ion exchange, Hydrated Ferric Oxide - Polymeric Ligand Exchanger (HFO-PLE) unit that polishes PEARS effluent to ensure low-phosphorus effluent. The hypothesis will be tested through study of the following specific objectives: Objective 1: Optimize and model the process chemistry for PEARS to produce struvite and potassium struvite from poultry litter. Objective 2: Achieve additional phosphorus recovery from PEARS effluent using specialty polymeric ligand exchangers impregnated with hydrated ferric oxide. Objective 3: Determine the purity of the recovered phosphorus product and explore the sustainable reuse of extraction and regeneration solutions. Objective 4: Determine potential nutrient load reductions in the Chesapeake Bay watershed and development a start-up program for a PEARS-HFO-PLE pilot. The generation of high-value phosphorus-based fertilizers from poultry litter would be an important advancement in the environmental-agricultural field. The approach to coupling the PEARS and HFO-PLE systems will ensure process effluent has low phosphorus content. The project will leverage ongoing relationships with the Meyerhoff Scholars Programs, which primarily serves African American students, to engage and mentor undergraduate students in research. The research team will engage farmers and agricultural communities to describe the benefits of phosphorus recovery.