Department of Chemical and Biochemical Engineering, University of Western Ontario, London, Canada N6A 5B9.
Bioresour Technol. 2013 Jan;128:281-9. doi: 10.1016/j.biortech.2012.10.069. Epub 2012 Oct 25.
This paper studies integrated simultaneous carbon and nitrogen removal as well as worm predation, in a circulating fluidized bed biofilm reactor (CFBBR) operated with an anoxic-aerobic bioparticle recirculation. A lab-scale CFBBR with a 8.5-liter reaction zone comprising 2L anoxic and 6.5L aerobic compartments was designed to evaluate the aquatic Oligochaete worm effect. Long-term (200 days) performance showed that stable and high-rate chemical oxygen demand (COD) with sodium acetate as the carbon source and total nitrogen (NH(4)Cl as nitrogen source) conversions were achieved simultaneously, with low sludge production of 0.082 g VSS (volatile suspended solids) g COD(-1) at pseudo-steady-state. Worm predation, which causes considerable sludge reduction of the bioparticle process, was studied. The results proved that the worm predation has a significant impact on the pseudo-steady-state performance of the CFBBR, decreasing biomass yield, decreasing oxygen concentration and increasing expanded bed height.
本文研究了在缺氧-好氧生物颗粒循环的循环流化床生物膜反应器（CFBBR）中同时进行的碳氮去除和蠕虫捕食。设计了一个实验室规模的 CFBBR，反应区为 8.5 升，包括 2 升缺氧区和 6.5 升好氧区，以评估水生寡毛类蠕虫的效果。长期（200 天）的性能表明，以乙酸钠作为碳源和氯化铵作为氮源，同时实现了稳定且高速率的化学需氧量（COD）转化和总氮（TN）转化，在准稳态下，挥发性悬浮固体（VSS）与 COD 的比例为 0.082g。蠕虫捕食会导致生物颗粒过程中污泥大量减少，对此进行了研究。结果表明，蠕虫捕食对 CFBBR 的准稳态性能有显著影响，降低了生物量产率，降低了氧浓度并增加了膨胀床高度。
