Recirculating Hydrolyzed Biosolids to Anaerobic Digestion Process: Impact on Nutrients and Recalcitrant Organics

将水解生物固体再循环至厌氧消化过程：对营养物和顽固性有机物的影响

• 批准号: 544070-2019
• 负责人: Dagnew, Martha
• 金额: $ 1.82万
• 依托单位: University of Western Ontario
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=681089
• 关键词: Recirculating; Hydrolyzed; Biosolids; Anaerobic; Digestion

In Canada, municipal wastewater treatment plants generate an estimated 780,000 dry tonnes of biosolids per year, of which about 50% of the biosolids are land applied. Biosolids are nutrient rich organic material resulting from wastewater treatment that has been sufficiently processed to be land-applied safely. Land application of biosolids has proven a cost-effective method of waste disposal by beneficially recycling organic matter and nutrients and improving soil quality. However, not fully treated biosolids may also pose a potential threat to the environment and human health. One way of achieving complete treatment is through the use of a patented LystMize® process by the partnering organization Lystek. The Lystek process is an innovative, energy efficient and low temperature thermal-chemical sludge hydrolysis technology which uses a proprietary combination of heat, high pH, and high shear mixing to generate high solids and pathogen free product. The objective of the proposed work is to assess the fate of nutrients and recalcitrant organics in biosolids when processed using LysteMize® process.

在加拿大，城市废水处理厂每年估计产生 780,000 干吨生物固体，其中约 50% 的生物固体用于土地利用。生物固体是废水处理产生的营养丰富的有机材料，经过充分处理后可用于土地利用。生物固体的土地应用已被证明是一种经济有效的废物处理方法，可以有益地回收有机物和养分并改善土壤质量，但是，未完全处理的生物固体也可能对土壤造成潜在威胁。实现彻底处理的一种方法是使用合作组织 Lystek 的专利 LystMize® 工艺。 Lystek 工艺是一种创新、节能的低温热化学污泥水解技术，采用专有组合。这项工作的目的是评估使用 LysteMize® 工艺加工时生物固体中营养物质和顽固有机物的命运。