Enhancing Anaerobic Digestibility of Municipal Sludges by Physicochemical Pre-treatment

通过物化预处理提高城市污泥的厌氧消化率

• 批准号: 556907-2020
• 负责人: Elbeshbishy, Elsayed
• 金额: $ 8.96万
• 依托单位: Ryerson University
• 依托单位国家: 加拿大
• 项目类别: Alliance 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=706016
• 关键词: Enhancing; Anaerobic; Digestibility; Municipal; Sludges

With increasing quantity of municipal sewage sludge, the quality and level of treatment are of serious concern in Canada and many parts of the world, specifically, about 660,000 tons are produced annually in Canada. With the implementation of strict regulations on sludge disposal and closure of more landfills, sludge management is becoming increasingly challenging. Currently, not only the volatile solids stabilization efficiency of most existing anaerobic digesters is modest and relatively low but also the biosolids are difficult to dewater requiring high chemical conditioning doses. If this project is successful, stabilization efficiency will improve significantly targeting to consistently produce Class A biosolids (for unrestricted land disposal). Furthermore, higher biogas and energy production will be achieved. The main goal of this research is to develop a novel sludge pre-treatment process model using physicochemical agents such as temperature and pressure together with chemicals such as hydrogen peroxide, and free nitrous acid. Furthermore, this research project aims to understand the effect of the particle size distribution (full spectra distribution) on the hydrolysis rate coefficient and the biodegradability of municipal secondary sludges.

随着城市污水污泥数量的增加，处理的质量和水平在加拿大和世界许多地方都受到严重关注，特别是加拿大每年产生约660，000吨污泥。随着对污泥处置的严格规定的实施和更多垃圾填埋场的关闭，污泥管理变得越来越具有挑战性。目前，不仅大多数现有的厌氧消化器的挥发性固体稳定化效率是适度的且相对低，而且生物固体也难以分解，需要高的化学调节剂量。 如果该项目成功，稳定化效率将显著提高，目标是持续生产A级生物固体（用于不受限制的土地处置）。此外，还将实现更高的沼气和能源产量。本研究的主要目标是开发一种新的污泥预处理工艺模型，使用物理化学试剂，如温度和压力，以及化学品，如过氧化氢，和游离亚硝酸。此外，本研究计划旨在了解粒径分布（全光谱分布）对城市二次污泥水解速率系数和可生化性的影响。