I-Corps: Reformulating spent lime as a phosphorus-sorbing material

I-Corps：将废石灰重新配制为吸磷材料

• 批准号: 1663255
• 负责人: Daryl Dwyer
• 金额: $ 5万
• 依托单位: University of Toledo
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-11-01 至 2017-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1663255&HistoricalAwards=false
• 关键词: Corps; Reformulating; spent; lime; phosphorus

The broader impact/commercial potential of this I-Corps is in utilization of a byproduct of water treatment for reducing harmful impact of agricultural runoff. Spent lime is a common byproduct generated during the treatment process in water treatment plants. This project will beneficially reuse spent lime to reduce disposal costs for municipalities, improve water quality, and provide a suitable product to enhance agricultural production. Agricultural runoff and drainage of phosphorus are considered to be a contributing factor to eutrophication and proliferation of harmful algal blooms. The technology developed here utilizes spent lime from water treatment plants to remove phosphorus from surface waters. The spent material removed from the system will serve as a nutrient-enhanced product with many potential uses, including application directly to agricultural land or incorporation as a fertilizer additive.This I-Corps project utilizes spent lime as a sorbing material to remove phosphorus from surface waters. Calcium ions in spent lime form covalent bonds with orthophosphates to form calcium phosphate. Thus, phosphorus in a dissolved form precipitates to a solid form. The technology used here has demonstrated adsorption of phosphorus to spent lime is nearly instantaneous with a considerable calculated sorption capacity. Maximum phosphorus removal can be achieved by increasing the mass of spent lime. This project develops a phosphorus interceptor system that utilize spent lime as filter material. To maintain optimal performance, spent lime is replaced with new material after reaching phosphorus saturation. The resulting material is nutrient-enhanced with multiple potential agricultural uses.

这个I-Corps的更广泛的影响/商业潜力是利用水处理的副产品来减少农业径流的有害影响。废石灰是水处理厂处理过程中产生的常见副产品。该项目将有利于回收废石灰，降低市政当局的处置成本，改善水质，并为提高农业生产提供合适的产品。农业径流和磷的排放被认为是富营养化和有害藻华繁殖的一个促成因素。这里开发的技术是利用水处理厂的废石灰从地表水中去除磷。从系统中取出的废材料将作为营养增强产品，具有许多潜在用途，包括直接应用于农业用地或作为肥料添加剂。这个I-Corps项目利用废石灰作为吸附材料从地表水中去除磷。废石灰中的钙离子与正磷酸盐形成共价键，形成磷酸钙。因此，溶解形式的磷沉淀成固体形式。这里使用的技术表明，磷对废石灰的吸附几乎是瞬间的，具有相当大的计算吸附容量。最大限度地除磷可以通过增加废石灰的质量来实现。本项目开发了一种利用废石灰作为过滤材料的磷拦截系统。为了保持最佳性能，在达到磷饱和后，用新材料替代废石灰。由此产生的材料营养丰富，具有多种潜在的农业用途。