Evaluation of process for conversion of sewage sludge to activated carbon for wastewater treatment

这项提议的目标是提供一种新的工艺，将废水处理污泥转化为**碳质吸附剂，这种产品可以增强并用于处理二级污水，在排放到环境之前减少**新出现的污染物。这种将废物转化为资源的过程**不仅会减少废物的数量，而且可能对雨水处理和稳定沉积物/土壤中新出现的污染物也是有效的。这项工作将支持温哥华大都会这项**研究将由李博士和她在哥伦比亚大学土木工程专业的学生进行，涉及多个**组成部分：(1)利用温哥华大都会污水处理厂的二级污泥，通过控制条件(包括热解温度、加热时间、升温速率和生物量)来优化活化过程。(2)**比较在相同操作条件下从小炉子和大炉子获得的活性碳对多环芳烃(PAHs)的**物理特性**的关键物理特性(比表面积、表面官能团)和化学吸附能力**。(3)多环芳烃的吸附效率与吸附剂的物理化学性质相关。(4)将新的脱硫剂与UBC中试厂污泥的脱附结果进行比较。这项研究将为进一步进行更有针对性的测试奠定基础，该测试具有**直接应用于废水处理厂以去除**水环境中新出现的污染物的潜力。它将提供与替代污泥减量技术相比，在工业规模上生产**污泥基活性碳的经济可行性和可持续性的信息。

The goal of this proposal is to provide a novel process which converts wastewater treatment sludge into a**carbonaceous sorbent, a product which can be enhanced and used to treat secondary effluent, reducing**emerging contaminants before they are discharged to the environment. This waste-to-resources process would**not only reduce the quantity of waste, but also potentially be effective for stormwater treatment and for**stabilizing emerging contaminants in sediments/soils. This work will support Metro-Vancouver, a leader in**progressive solutions, in promoting its sustainable region initiative on "Integrated Liquid Waste and Resource**Management" and "Integrated Solid Waste and Resource Management", as well as waste-to-resources. The**research, to be carried out by Dr. Li and her Civil Engineering students at UBC, will involve several**components: (1) Optimize the activation by manipulating conditions, including pyrolysis temperature, heating**time, temperature ramping rate with biomass using WWTP secondary sludge from Metro Vancouver (MV). (2)**Compare key physical properties (specific surface area, surface functional group) and chemical adsorptivities**of activated carbons from small and larger furnaces obtained under the same operating conditions for their**physical properties on polyaromatic hydrocarbons (PAHs). (3) Correlate sorption efficiencies for PAHs and the**physiochemical properties of the sorbents. (4) Compare the results for the new sorbents with those produced**from UBC pilot plant sludge. This study will provide a foundation for further more focused testing that with**potential for direct application at wastewater treatment plants for removal of emerging contaminants from**aqueous environments. It will provide information on the economic viability and sustainability of producing**sludge-based activated carbons on an industrial scale, compared with alternative sludge reduction technologies.