Enhancement of digestion through microwave pretreatment

通过微波预处理增强消化

• 批准号: 993-2007
• 负责人: Droste, Ronald
• 金额: $ 1.97万
• 依托单位: University of Ottawa
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2007
• 资助国家: 加拿大
• 起止时间: 2007-01-01 至 2008-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=363225
• 关键词: Enhancement; digestion; through; microwave; pretreatment

Microwave Pretreatment of Waste Activated Sludge to Enhance Its Anaerobic DigestionRecent and current work has focused on microwave (MW) pretreatment of biological solids produced in wastewater treatment processes to render them more amenable to anaerobic digestion which reduces the quantity of residual solids for ultimate disposal on the land or for incineration.The work proposed is a continuation of the previous work based on the demonstrated improvements that were achieved with MW pretreatment temperatures up to 100oC. Higher temperatures and a wider variety of pretreatment conditions will be studied in the current research to maximize the digestion efficiency (both the rate of digestion and the ultimate amount of digestion that can be achieved) after pretreatment. More basic research will be conducted to understand MW induced transformations to exploit their potential for digestion improvement.The benefits of the technology include stability of process operation, greater pathogen reduction, higher biogas (methane) yield, lower solids production, and improved sludge dewaterability resulting in a technology that is more economical, easier to operate, and less harmful to the environment. Biogas is able to be captured from anaerobic digestion at a wastewater treatment plant. Greenhouse gas emissions are reduced and reduction of contamination of natural waters occurs through improved digestion of waste solids. Anaerobic digestion is commonly used around the world.

微波预处理废活性污泥强化厌氧消化目前和目前的工作主要集中在对废水处理过程中产生的生物固体进行微波(MW)预处理，使其更易于厌氧消化，从而减少最终在陆地上处置或用于焚烧的剩余固体的数量。建议的工作是基于微波预处理温度高达100摄氏度所取得的改进的基础上进行的先前工作的继续。本研究将研究更高的温度和更多种类的前处理条件，以最大限度地提高前处理后的消化效率(包括消化速度和最终可达到的消解量)。将进行更多的基础研究，以了解微波诱导的转化，以开发其消化改善的潜力。该技术的好处包括：工艺运行稳定，病原菌减少，沼气(甲烷)产量较高，固体产量较低，改善污泥脱水性能，从而形成一种更经济、更易于操作、对环境危害更小的技术。沼气可以从废水处理厂的厌氧消化中捕获。通过改进对废物固体的消化，减少温室气体排放，减少对自然水的污染。厌氧消化在世界各地普遍使用。