School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China.
Bioresour Technol. 2012 Jan;103(1):7-15. doi: 10.1016/j.biortech.2011.08.114. Epub 2011 Sep 3.
Limited filamentous bulking (LFB) was proposed to save aeration energy consumption and enhance the capacity of filaments to degrade substrates with low concentrations in activated sludge systems. Operational parameters favorable for maintaining the LFB state were investigated in an anoxic-oxic reactor treating domestic wastewater. The experiments showed that the LFB state would deteriorate with sharply decreasing temperature, reducing substrate gradients or removing anoxic zones. The balance between filaments and floc-formers could be achieved by controlling dissolved oxygen and sludge loading rates to be in optimal ranges. Eikelboom Type 0041 and CandidatusMicrothrix parvicella were the filamentous bacteria responsible for the LFB state. However, the excess growth of Eikelboom Type 021N and Sphaerotilus natans were observed when serious bulking occurred under low substrate gradients. It was demonstrated that stable maintenance of LFB for energy saving was feasible by process control and optimization.
有限丝状菌膨胀（LFB）被提出以节省曝气能耗，并增强丝状菌在活性污泥系统中降解低浓度基质的能力。在处理生活污水的缺氧-好氧反应器中，研究了有利于维持 LFB 状态的操作参数。实验表明，LFB 状态会随着温度的急剧下降、基质梯度的降低或缺氧区的去除而恶化。通过控制溶解氧和污泥负荷率在最佳范围内，可以实现丝状菌和絮体形成菌之间的平衡。Eikelboom Type 0041 和 CandidatusMicrothrix parvicella 是导致 LFB 状态的丝状菌。然而，当在低基质梯度下发生严重膨胀时，会观察到 Eikelboom Type 021N 和 Sphaerotilus natans 的过度生长。实验证明，通过工艺控制和优化，可以实现稳定的 LFB 以节省能源。
