Cranfield University Water Sciences Institute, Cranfield MK43 0AL, UK.
Warden Biomedia, 31 Sundon Industrial Estate, Dencora Way, Luton, Bedford LU3 3HP, UK.
Bioresour Technol. 2018 Oct;266:463-471. doi: 10.1016/j.biortech.2018.06.096. Epub 2018 Jun 30.
Five carrier media with different shapes (spherical and cylindrical), sizes, voidage and protected surface areas (112-610 m/m) were studied in a pilot scale moving bed biofilm reactor (MBBR). This study aimed at assessing start-up duration using biofilm formation rates. Results indicated that the spherical media required shorter periods to achieve stable biofilm formation rates associated with chemical oxygen demand (COD) (15-17 days), compared to cylindrical high surface area media (23-24 days). Protected surface area presented weaker correlations with the biofilm formation rate for COD (R = 0.83) and ammonia removal (R = 0.76). However, good correlations were observed with a combination of the media physical factors: dimensionality (Di), voidage (Voi), and hydraulic efficiency (HE) strongly correlated with biofilm formation rates for heterotrophic (R = 0.95) and nitrifying bacteria (R = 0.92). This study proposes that the media physical properties can contribute to shortening start-up, contributing to improved removal rates and fast commissioning of MBBRs.
五种具有不同形状（球形和圆柱形）、大小、空隙率和保护表面积（112-610 m/m）的载体介质在中试规模移动床生物膜反应器（MBBR）中进行了研究。本研究旨在通过生物膜形成率评估启动时间。结果表明，与圆柱形高表面积介质（23-24 天）相比，球形介质达到稳定生物膜形成率（与化学需氧量（COD）相关）所需的时间更短（15-17 天）。保护表面积与 COD（R=0.83）和氨去除（R=0.76）的生物膜形成率相关性较弱。然而，对于异养菌（R=0.95）和硝化菌（R=0.92），观察到与介质物理因素的组合具有良好的相关性：维度（Di）、空隙率（Voi）和水力效率（HE）。本研究提出，介质物理性质可以有助于缩短启动时间，从而提高 MBBR 的去除率和快速调试。
