Collaborative Research: GOALI: Sustainable phosphorus recovery from agricultural waste

1512429（Blaney）和1511399（Sengupta）废物流传统上被认为是环境系统的污染源。家禽废弃物由于农业区径流中的高营养负荷而成为最近感兴趣的话题。展望未来，需要转变模式，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，该技术允许连续流处理家禽粪便和高回收率的磷。通过将养分负荷问题转化为潜在的资源/收入流，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Triea Technologies的合作来实现，Triea Technologies是一家专注于农业可持续性的公司。本研究的假设是，可以使用两阶段过程从浓缩的家禽粪便中可持续地回收磷。该工艺由磷提取和回收系统（PEARS）和混合离子交换、水合氧化铁-聚合物配体交换器（HFO-PLE）单元组成，前者允许从家禽垫料中释放磷，随后沉淀为高价值产品，后者可对PEARS流出物进行抛光，以确保低磷流出物。该假设将通过以下具体目标的研究进行测试：目标1：优化和模拟PEARS从家禽粪便中生产鸟粪石和鸟粪石钾的过程化学。目标二：使用浸渍有水合氧化铁的专用聚合物配体交换剂从PEARS流出物中实现额外的磷回收。目标3：确定回收磷产品的纯度，并探索萃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，并制定PEARS-HFO-PLE试点的启动计划。从家禽粪便中提取高价值的磷基肥料将是环境农业领域的一个重要进展。耦合PEARS和HFO-PLE系统的方法将确保工艺流出物具有低磷含量。该项目将利用与Meyerhoff学者计划的持续关系，该计划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。研究小组将让农民和农业社区参与进来，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.