Advancing thermal hydrolysis process for sewage sludge digestion facility in WWTPs

推进污水处理厂污泥消化设施的热水解工艺

• 批准号: 533278-2018
• 负责人: Dhar, Bipro
• 金额: $ 4.58万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 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=691155
• 关键词: Advancing; thermal; hydrolysis; process; sewage

Sewage sludge management is a significant economic factor in the operation of municipal wastewater treatment plants (WWTPs). In centralized WWTPs, anaerobic digestion (AD) is the most widely exercised process for solids removal and stabilization of sludge. However, efficient removal of solids remains a significant challenge faced by WWTPs. Additionally, the conventional mesophilic AD cannot achieve Class A biosolids for unrestricted land application according to regulatory guidelines. In recent years, thermal hydrolysis of sewage sludge has emerged as a promising method for enhancing AD performance by improving rate-limiting hydrolysis step and thereby producing high-quality biosolids. In this proposed project, the research team will undertake detailed and systematic bench-scale studies to evaluate various process parameters and retrofitting schemes of thermal hydrolysis process (THP) for anaerobic digestion facility at WWTPs. The effectiveness of these schemes will be assessed based on solids reduction, biomethane recovery, quality of biosolids regarding pathogen content, antibiotic resistance genes, dewaterability, odor generation potential, and quality of biogas regarding hydrogen sulfide content, and economic feasibility. Feasibility of further enhancing THP with the addition of chemicals will be examined. A calibrated process model will be developed to provide a design, optimization, and sensitivity analysis tool for various process parameters. Moreover, the preliminary techno-economic feasibility of retrofitting THP will be examined.

污泥管理是市政废水处理厂（WWTPS）运营的重要经济因素。在集中式WWTP中，厌氧消化（AD）是固体去除和稳定污泥的最广泛行使的过程。但是，有效去除固体仍然是WWTP面临的重大挑战。此外，根据法规指南，常规的中嗜菌AD无法实现无限制土地应用的A类生物固体。近年来，污水污泥的热水解已成为一种有前途的方法，可通过改善限制速率的水解步骤，从而产生高质量的生物固醇。在这个拟议的项目中，研究团队将进行详细且系统的台式研究，以评估WWTPS的厌氧消化设施的热水解过程（THP）的各种过程参数和改造方案。这些方案的有效性将根据固体减少，生物甲烷恢复，生物固体的质量，关于病原体含量，抗生素耐药性基因，脱水性，气味产生潜力以及沼气质量在硫化物含量方面的质量以及经济可行性。将检查进一步增强THP的可行性，并将检查化学品的添加。将开发校准的过程模型，以为各种过程参数提供设计，优化和灵敏度分析工具。此外，将检查改造THP的初步技术经济可行性。