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

基本信息

批准号：
533278-2018
负责人：
Dhar, Bipro
金额：
$ 4.46万
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：
2020
资助国家：
加拿大
起止时间：
2020-01-01 至 2021-12-31
项目状态：
已结题

来源：
https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=698451
关键词：
Advancing thermal hydrolysis process sewage

项目摘要

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.

污水污泥管理是城市污水处理厂（WWTP）运营中的一个重要经济因素。在集中式污水处理厂中，厌氧消化 (AD) 是最广泛使用的固体去除和污泥稳定工艺。然而，有效去除固体仍然是污水处理厂面临的重大挑战。此外，根据监管指南，传统的中温 AD 无法实现无限制土地应用的 A 级生物固体。近年来，污水污泥热水解已成为一种有前途的方法，通过改进限速水解步骤来提高 AD 性能，从而产生高质量的生物固体。在本拟议项目中，研究团队将进行详细、系统的小规模研究，以评估污水处理厂厌氧消化设施热水解工艺（THP）的各种工艺参数和改造方案。这些计划的有效性将根据固体减少、生物甲烷回收、有关病原体含量的生物固体质量、抗生素抗性基因、脱水性、气味产生潜力、有关硫化氢含量的沼气质量以及经济可行性进行评估。将审查通过添加化学品进一步增强 THP 的可行性。将开发校准的工艺模型，为各种工艺参数提供设计、优化和灵敏度分析工具。此外，还将审查改造THP的初步技术经济可行性。