显微CT技术测量不规则多孔悬浮载体比表面积初探

Specific surface area of irregular porous suspended carriers by Micro CT

摘要:

循环水产养殖系统(RAS)中最关键的水处理过程是氧化有害的含氮化合物,移动床生物膜反应器(MBBR)是去除水体中有害含氮化合物的默认设计选择,而悬浮载体是MBBR系统的核心部件。为了较准确地评估MBBR中的载体性能,建立一种简单快速有效的悬浮载体比表面积测量方法,使用显微CT技术对两种不规则多孔悬浮载体进行扫描建模,获得载体性能最重要的指标——比表面积参数,并通过数学模型验证了计算的准确性。结果显示,与BET气体吸附法相比,显微CT法测得的比表面积更适用于评估载体性能。

Abstract:

Recirculating aquaculture systems(RAS) are seen as a sustainable solution to meet the growing global demand for seafood.The most critical water treatment process in RAS is the oxidation of harmful nitrogenous compounds,and moving bed biofilm reactors(MBBR) are the default design choice for removing harmful nitrogenous compounds.Suspended carriers are the core component of MBBR systems,and the most important indicator of carrier performance is specific surface area.Two irregular porous suspension carriers were scanned and modeled using the micro-CT technique to obtain specific surface area,and the results showed that the specific surface area measured by the micro-CT was more suitable for evaluating carrier performance than the BET(Brunauer,Emmett and Teller) method.