Department of Engineering, Tottori University, 4-101 Koyama-Minami, Tottori 6808552, Japan.
Department of Engineering, Tottori University, 4-101 Koyama-Minami, Tottori 6808552, Japan.
Bioresour Technol. 2023 Aug;381:129133. doi: 10.1016/j.biortech.2023.129133. Epub 2023 May 6.
Fluidised-bed systems are a promising approach to microalgal cultivation, but few studies have considered their application to indigenous microalgal consortia (IMCs), which have high adaptability to wastewater. In this study, IMCs were cultivated in treated wastewater with and without fluidised carriers, and the effects of operating parameters were considered. Microalgae in the culture were confirmed to originate from the carriers, and the IMC presence on the carriers was promoted by decreasing the carrier replacement number and increasing the culture replacement volume. The presence of carriers enabled greater nutrient removal from the treated wastewater by the cultivated IMCs. Without carriers, IMCs in the culture were scattered and showed poor settleability. With carriers, IMCs in the culture exhibited good settleability owing to floc formation. The improved settleability with carriers also increased the energy production from sedimented IMCs.
流化床系统是一种很有前途的微藻培养方法，但很少有研究考虑将其应用于对废水具有高适应性的土著微藻群落（IMCs）。在本研究中，在有无流化载体的情况下用处理后的废水培养 IMCs，并考虑了操作参数的影响。培养物中的微藻被确认为源自载体，通过减少载体更换数量和增加培养物更换体积，促进了 IMC 在载体上的存在。载体的存在使培养的 IMCs 从处理后的废水中去除了更多的营养物质。没有载体，培养物中的 IMC 分散且沉降性差。有载体时，培养物中的 IMC 由于絮凝形成而具有良好的沉降性。载体的改善沉降性也增加了从沉降 IMC 中产生的能量。
