School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China.
Bioresour Technol. 2010 Feb;101(4):1120-6. doi: 10.1016/j.biortech.2009.09.051. Epub 2009 Oct 17.
Limited filamentous bulking caused by low dissolved oxygen (DO) was proposed to establish a low energy consumption wastewater treatment system. This method for energy saving was derived from two full-scale field observations, which showed pollutants removal would be enhanced and energy consumption could be reduced by at least 10% using limited filamentous bulking. Furthermore, preliminary investigation including the abundance evaluation and the identification of filamentous bacteria demonstrated that the limited filamentous bulking could be repeated steadily in a lab-scale anoxic-oxic reactor fed with domestic wastewater. The sludge loss did not occur in the secondary clarifier, while COD and total nitrogen removal efficiencies were improved by controlling DO for optimal filamentous bacterial population. Suspended solids in effluent were negligible and turbidity was lower than 2 NTU, which were distinctly lower than those under no bulking. Theoretical and experimental results indicated the aeration consumption could be saved by the application of limited filamentous bulking.
有限丝状菌膨胀导致低溶解氧（DO），以建立低能耗废水处理系统。这种节能方法源于两个全规模现场观察，表明通过有限丝状菌膨胀，污染物去除率可提高至少 10%，能耗可降低至少 10%。此外，初步调查包括丰度评估和丝状菌的鉴定表明，在以生活污水为食的实验室规模缺氧-好氧反应器中，可以稳定地重复进行有限丝状菌膨胀。在二次沉淀池中没有发生污泥流失，而通过控制 DO 使丝状菌种群最佳，COD 和总氮去除效率得到提高。出水的悬浮物可以忽略不计，浊度低于 2 NTU，明显低于非膨胀条件下的值。理论和实验结果表明，应用有限丝状菌膨胀可以节省曝气消耗。
