Exploratory study on the enhancement of conversion of sewage sludge to activated carbon process for wastewater treatment achieving waste-to-resources

该提案的目的是提供一种新的工艺，该工艺将废水处理污泥转化为含碳吸附剂，该产品可以增强并用于处理二级出水，在排放到环境中之前减少新出现的污染物。这一废物变资源的过程不仅可以减少废物，而且还可能有效地处理雨水和稳定沉积物/土壤中新出现的污染物。这项工作将支持大温哥华市这一渐进解决方案的领导者促进其关于“液体废物和资源综合管理”和“固体废物和资源综合管理”以及废物变资源的可持续区域倡议。这项研究将由李博士和她在UBC的土木工程学生进行。本项目将包括以下几个方面：（1）探索以二次污泥为原料，采用不同化学品或生物质进行化学活化的方法。(2)优化操作条件，如热解温度、加热时间、升温速率、化学品含量、催化剂类型和剂量。(3)全氟化合物吸附效率与吸附剂理化性质的相关性。(4)污泥基活性炭与商业活性炭去除水环境中各种污染物的初步比较。它还将提供关于以工业规模生产污泥基活性炭与其他污泥减量技术相比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 acarbonaceous sorbent, a product which can be enhanced and used to treat secondary effluent, reducingemerging contaminants before they are discharged to the environment. This waste-to-resources process wouldnot only reduce the waste, but also potentially be effective for stormwater treatment and for stabilizingemerging contaminants in sediments/soils. This work will support Metro-Vancouver, a leader in progressivesolutions, in promoting its sustainable region initiative on "Integrated Liquid Waste and ResourceManagement" and "Integrated Solid Waste and Resource Management", as well as waste-to-resources. Theresearch will be carried out by Dr. Li and her Civil Engineering students at UBC. The project will involveseveral components: (1) Exploration of chemical activation methods with different chemicals or biomass basedon secondary sludge. (2) Optimization of operating conditions, such as pyrolysis temperature, heating time,temperature ramping rate, chemical content, catalyst type and dose. (3) Correlations between sorptionefficiency of perfluorinated compounds and physiochemical properties of the sorbents. (4) Preliminarycomparison of the sludge-based activated carbon with commercial activated carbon for the removal of a widerange of contaminants from aqueous environments. It will also provide information on the economic viabilityand sustainability of producing sludge-based activated carbons on an industrial scale compared with alternativesludge reduction technologies.