Particle size analyzer for investigating flocculation and dipsersion systems

用于研究絮凝和分散系统的粒度分析仪

• 批准号: RTI-2017-00356
• 负责人: Fatehi, Pedram
• 金额: $ 8.84万
• 依托单位: Lakehead University
• 依托单位国家: 加拿大
• 项目类别: Research Tools and Instruments
• 财政年份: 2016
• 资助国家: 加拿大
• 起止时间: 2016-01-01 至 2017-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=616652
• 关键词: Particle; size; analyzer; investigating; flocculation

Currently, the pulp and paper industry is struggling financially due to the reduction in paper consumption and changes in global supply. The industry is searching for alternatives to increase its commercial revenues or reduce its operating costs. Cellulose is currently converted to paper products, but the lignin and some hemicelluloses that are extracted from woody biomass in the pulping process remain under-utilized. In Dr. Fatehi’s research group, several research programs have been developed to valorize lignin and hemicelluloses in supporting pulp mills to initiate biorefineries. These programs include 1) the extraction of lignin and hemicelluloses from pulping spent liquors and wastewater effluents, and 2) the conversion of lignin to high-value flocculants and dispersants. To reduce the operating costs of wastewater treatment systems of the mills, a program is under investigation in Dr. Fatehi’s group to use biomass fly ash as an adsorbent for wastewater effluents. A particle size analyzer is an essential instrument in colloid and surface science, and it is used by chemists, technologists and engineers worldwide. The instrument provides information about the size of particles in solutions/suspensions, which is crucial in controlling the behavior of particles in aqueous systems. The requested research instrument will advance the applicant’s research programs substantially. It is also essential to student training (it will be used on a daily basis) and to applicant’s national and international collaborations. It provides important information for 1) evaluating the performance of lignin-based products, which is essential for designing lignin-based dispersants and flocculants; 2) understanding the mechanism of chemical modification of lignin; and 3) understanding and therefore developing a fly ash-based wastewater treatment system. It is expected that, with the help of this instrument, techniques to increase revenues or to reduce the operating costs of the pulp mills will be developed and applied in pulp mills. These advances will help pulp mills in overcoming their current financial challenges. Valorized lignin will be a new product of pulp mills, improving their global competitiveness and offsetting the volatility of commodity prices. Supporting the pulping industry will secure Canada’s competitiveness in the global commodities market, and will bring stable jobs and greater prosperity to communities. Furthermore, the replacement of oil-based flocculants and dispersants with lignin-based chemicals will enormously reduce the environmental impact of industrial and municipal wastewater treatment processes.

目前，由于纸张消费减少和全球供应变化，纸浆和造纸行业在财务上举步维艰。该行业正在寻找替代方案，以增加其商业收入或降低其运营成本。纤维素目前被转化为纸产品，但在制浆过程中从木质生物质中提取的木质素和一些半纤维素仍然未得到充分利用。在Fatehi博士的研究小组中，已经开发了几个研究项目，以支持纸浆米尔斯厂启动生物精炼中的木质素和半纤维素。这些项目包括：1）从制浆废液和废水中提取木质素和半纤维素; 2）将木质素转化为高价值的絮凝剂和分散剂。为了降低米尔斯废水处理系统的运营成本，Fatehi博士的团队正在研究一个项目，将生物质粉煤灰用作废水排放物的吸附剂。 粒度分析仪是胶体和表面科学中必不可少的仪器，它被世界各地的化学家，技术人员和工程师使用。该仪器提供有关溶液/悬浮液中颗粒尺寸的信息，这对于控制颗粒在水性系统中的行为至关重要。所要求的研究工具将大大推进申请人的研究计划。它也是必不可少的学生培训（它将在日常基础上使用）和申请人的国家和国际合作。它提供了重要的信息，1）评估基于木质素的产品的性能，这对于设计基于木质素的分散剂和絮凝剂是必不可少的; 2）了解木质素的化学改性机理; 3）了解并因此开发基于粉煤灰的废水处理系统。 预计，在该仪器的帮助下，将开发和应用于纸浆米尔斯厂的技术，以增加收入或降低纸浆米尔斯厂的运营成本。这些进展将有助于纸浆米尔斯克服当前的财务挑战。有价木质素将成为纸浆米尔斯厂的新产品，提高其全球竞争力，抵消商品价格的波动。支持制浆工业将确保加拿大在全球商品市场的竞争力，并将为社区带来稳定的就业机会和更大的繁荣。此外，用木质素基化学品取代油基絮凝剂和分散剂将大大减少工业和城市废水处理过程对环境的影响。