Leachate generation reduction: Assessment of final cover layouts using lysimeters

减少渗滤液产生：使用蒸渗仪评估最终覆盖布局

• 批准号: 508222-2016
• 负责人: Cabral, Alexandre
• 金额: $ 3.1万
• 依托单位: Université de Sherbrooke
• 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=688576
• 关键词: Leachate; generation; reduction; Assessment; final

Waste Management (WM) operates several landfills in Canada and leachate generation is quite important in some old sites, particularly in cells that were capped following the now-outdated Quebec's landfill regulation. The latter did not require final covers to create an impedance to seepage of water through the cover, thereby reducing leachate generation. Leachate is expensive to collect and treat, and its presence may disturb waste decomposition and clog biogas wells screens. The central theme of this project is leachate generation reduction. This is usually achieved by appropriate cover design. But, irrelevant of design and materials, effectiveness of the design has to be assessed by proper measurement of seepage over time. In this project, we will test the reliability of lysimeters to assess infiltration in the field. This is fundamental to give credibility to the exercise of assessing the effectiveness of any final cover design. As far as design and materials are concerned, we will evaluate the behaviour of contaminated soils as part of cover systems and their impact on the surrounding environment. The goal is to open new avenues for their beneficial reuse, which is strategic for WM and to the landfilling industry at large. In addition to the formation of highly qualified personnel in this important area of civil engineering, there are important practical, economical and scientific outcomes to expect from this partnership with WM, including: significant reduction in leachate treatment costs, development of new final cover strategies, and documentation of large-scale lysimeters and of unsaturated flow through final covers.

废物管理公司 (WM) 在加拿大运营着多个垃圾填埋场，渗滤液的产生在一些旧场地非常重要，特别是在现已过时的魁北克垃圾填埋场法规封顶的单元中。后者不需要最终的覆盖物来对水渗过覆盖物产生阻碍，从而减少渗滤液的产生。渗滤液的收集和处理成本很高，而且它的存在可能会干扰废物分解并堵塞沼气井滤网。该项目的中心主题是减少渗滤液的产生。这通常通过适当的封面设计来实现。但是，与设计和材料无关，设计的有效性必须通过适当测量渗漏随时间的变化来评估。在这个项目中，我们将测试蒸渗仪的可靠性，以评估现场渗透情况。这对于评估任何最终封面设计的有效性至关重要。就设计和材料而言，我们将评估作为覆盖系统一部分的受污染土壤的行为及其对周围环境的影响。其目标是为它们的有益再利用开辟新途径，这对于垃圾填埋场和整个垃圾填埋行业都具有战略意义。除了在土木工程这一重要领域培养高素质人才外，与 WM 的合作还将带来重要的实用、经济和科学成果，包括：渗滤液处理成本大幅降低、制定新的最终覆盖策略、以及大型蒸渗仪和通过最终盖的不饱和流的记录。