Innovative technologies for minimum environmental impact

一种新型的生物干燥工艺已被证明可以去除混合污泥中的水分，现在将用于去除森林生物精炼厂生物质原料中的水分。待测材料包括森林残留物、小黑麦和这两种材料的混合物。与混合污泥相比，这两种材料的营养含量都要低得多。为了评估营养水平如何影响生物干燥，将研究营养物质运输的机制。本项目的短期具体目标是：(1)完成新型生物干燥反应器的二维建模，使该模型可用于工艺放大和反应器设计；(2)确定有效处理森林残留物和小黑麦的生物干燥工艺条件，从而实现更高干燥水平的恒定值；(3)通过改变原料的物理形态，探索原料预处理对生物干燥器效率的影响，从而评估处理不同和组合生物质原料的过程；(4)完成生物干燥过程的物理和数值模拟，包括生物质营养物质的运输，以便该模型可以帮助确定改进的生物干燥条件；(5)量化在现有纸浆和造纸厂实施的生物精炼过程中使用生物干燥的经济优势。该计划的长期目标是(1)传达生物干燥过程应纳入生物炼制的工业方案，以便它可能为加拿大纸浆和造纸公司创造竞争优势；(2)探索在示范规模上测试该生物干燥过程的潜力，理想情况下与生物炼制过程的实施相关项目相结合。预计该计划将产生一种新颖而实用的生物干燥技术，这可能是几种生物炼制工艺经济可行性的关键。

A novel biodrying process that has been demonstrated for removing moisture from mixed sludge will now be used to remove moisture from the biomass feedstocks for the Forest Biorefinery. Materials to be tested include forest residuals, triticale and mixtures of these two materials. Both of these materials have a much lower nutrient content when compared to mixed sludge. The mechanisms for nutrient transport will be examined in order to assess how nutrient levels affect biodrying. The specific short-term objectives of this program are (1) to complete 2-dimensional modeling of the novel biodrying reactor, so that the model can be applied for process scale-up and reactor design, (2) to determine the biodrying process conditions that effectively treat forest residuals and triticale, so that constant values of higher dryness levels are achieved, (3) to explore the impact of feedstock pre-treatment on the biodryer efficiency due to modification of the physical form of the feedstocks, so that the process can be assessed for the treatment of different and combined biomass feedstocks, (4) to complete physical and numerical modeling of the biodrying process, including biomass nutrient transport, so that the model can be used to assist in identifying improved biodrying conditions, and (5) to quantify the economic advantages of biodrying for use in the biorefinery processes implemented into existing pulp and paper mills. The longer-term objectives of this program are (1) to communicate the industrial scenarios under which the biodrying process should be incorporated in the biorefinery, such that it would potentially create a competitive advantage for Canadian pulp and paper companies, and (2) to explore the potential for testing of this biodrying process at the demonstration scale, ideally in conjunction with a project related to the implementation of a biorefinery process. It is expected that the program will result in a novel but practical biodrying technology, which may be the key to economic viability for several biorefinery processes.