Identification of the major contributors to the high pH of fly ash followed by chemically induced pH reduction

路易斯安那太平洋加拿大有限公司是一个工程木材设施，雇用约300名全职员工，并利用 它产生的木材残留物，以及一些森林产品公司产生的废物， 东南不列颠哥伦比亚省，以发电和加工蒸汽的工程木材产品设施在黄金， 公元前这种电力和工艺蒸汽是通过在一个燃烧室中燃烧木屑、树皮和木纤维产生的。 生物质燃烧发电厂，并作为这种燃烧的结果;约4400吨灰残余物， 每年都在这个工厂生产。经过20年的运行，约88000吨灰渣已被 产生并储存在现场垃圾填埋场单元中。目前，一旦现场填埋单元达到容量，该设施 选择开辟另一个垃圾填埋场或将灰烬残渣运送到永久性垃圾填埋场。然而 路易斯安那太平洋加拿大有限公司希望减少其对环境的影响，并重新利用灰烬残留物 作为农业用地的营养丰富的肥料。在灰烬残留物可以作为肥料施用之前， 灰分的pH值需要化学降低，钠含量需要优化，以用于农业生产。 使用.不幸的是，化学降低来自生物质燃烧发电厂的灰分残余物的pH值， 在农业领域作为肥料的应用以前从未进行过。为了实现这一点， 路易斯安那太平洋加拿大有限公司已与KRL解决方案有限公司建立合作伙伴关系，看 研究将火山灰残渣用作肥料的可行性，并与汤普森河流大学的科学家合作， 提供实验设计和化学还原方面的科学专门知识。这一合作将 确定一种安全和环保的方法，以降低灰分残留物的pH值，并评估 大规模化学还原和再利用目前约88000吨灰渣的可行性 位于不列颠哥伦比亚省戈尔登的工程木制品工厂的现场垃圾填埋场。 该项目将提供必要的知识，以减少约400万吨的灰烬残留物，最终在 垃圾填埋场每年从加拿大各地的类似设施。

Louisiana-Pacific Canada Ltd. is an engineered wood facility that employs ~300 fulltime staff and makes use of wood residuals that it generates, as well as waste produced by a number of forest product companies in southeastern B.C. to generate electricity and process steam for its engineered wood product facility in Golden, B.C. This electricity and process steam is generated by burning wood chips, bark and wood fiber in a biomass-fired power plant and as a result of this burning; approximately 4400 tonnes of ash residuals are produced at this facility every year. After 20 years in operation ~88000 tonnes of ash residuals have been generated and stored in onsite landfill cells. Presently, once onsite landfill cells reach capacity the facility has the option to open another landfill cell or transport the ash residuals to a permanent landfill. However Louisiana-Pacific Canada Ltd. would like to reduce its impact on the environment and reuse the ash residuals as a nutrient rich fertilizer for agricultural lands. Before the ash residuals can be applied as a fertilizer the high pH of the ash needs to be chemically reduced and the sodium content needs to be optimized for agricultural use. Unfortunately, chemically reducing the pH of ash residuals from a biomass-fired power plant for application on agricultural fields as a fertilizer has never been done before. To accomplish this, Louisiana-Pacific Canada Ltd. has entered into a collaborative partnership with KRL Solutions Ltd., to look into the feasibility of using ash residuals as a fertilizer and with scientists at Thompson Rivers University to provide scientific expertise in experimental design and chemical reduction. Together, this partnership will identify a safe and environmentally friendly method of reducing the pH of the ash residuals and assess the feasibility of the large scale chemical reduction and reuse of the ~88000 tonnes of ash residuals currently in onsite landfills at the engineered wood product facility in Golden, B.C. The success of this initial research project will provide the knowledge necessary to reduce the ~4 million tonnes of ash residuals that end up in landfills each year from similar facilities across Canada.