Recovery & re-use of sewage phosphate as a fertilizing soil amendment

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• 批准号: 463443-2014
• 负责人: Glasauer, Susan
• 金额: $ 1.82万
• 依托单位: University of Guelph
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2014
• 资助国家: 加拿大
• 起止时间: 2014-01-01 至 2015-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=558412
• 关键词: Recovery; re; use; sewage; phosphate

Waterloo Biofilter is a company based in Rockwood, Ontario that manufactures technologies for sewage treatment, specifically in off-sewer developments (www.waterloo-biofilter.com). The core technology is an absorbent trickle filter for remediation of septic tank effluent to 'sand filter quality' effluent. The Biofilter removes organic and nitrogenous contaminants, but phosphorus is only removed with add-on technologies, such as dosing of liquid aluminate. This approach is expensive, and constant re-supply of caustic chemical, plugging and freezing of pipes, etc., makes it impractical for use at small facilities and houses. The Company has developed a low-cost phosphorus removal system using Fe generated by a proprietary electrochemical process (EC-PTM), to sequester phosphate in a variety of P-removal filter matrices. The iron-rich EC-P effluent (preferably pretreated to secondary quality) will pass through a 'P-recovery medium' such as vitreous silicate fiber, the present focus for P-recovery medium, as it is already used as a textural soil amendment. Iron-phosphate minerals precipitate in the matrix, and the availability of the P sequestered in the minerals is unknown. Researchers at the University of Guelph will collaborate with Waterloo Biofilter research staff to investigate the re-use of the saturated matrix in soil as a fertilizing soil amendment.

Waterloo Biofilter 是一家位于安大略省罗克伍德的公司，生产污水处理技术，特别是下水道开发技术 (www.waterloo-biofilter.com)。 核心技术是吸收性滴流过滤器，用于将化粪池废水修复为“砂滤质量”废水。生物过滤器可去除有机和含氮污染物，但磷只能通过附加技术去除，例如添加液体铝酸盐。这种方法成本高昂，并且不断补充腐蚀性化学品、管道堵塞和冻结等，使其在小型设施和房屋中使用不切实际。 该公司开发了一种低成本除磷系统，使用专有电化学工艺 (EC-PTM) 产生的铁，将磷酸盐隔离在各种除磷过滤基质中。富含铁的 EC-P 废水（最好经过预处理达到二级质量）将通过“磷回收介质”，例如玻璃硅酸盐纤维，这是目前磷回收介质的焦点，因为它已经被用作质地土壤改良剂。 铁磷酸盐矿物沉淀在基质中，并且矿物中封存的磷的有效性未知。圭尔夫大学的研究人员将与滑铁卢生物过滤器研究人员合作，研究土壤中饱和基质作为施肥土壤改良剂的再利用。