Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China; National Centre for International Research of Low-carbon and Green Buildings, Chongqing University, Chongqing 400045, China.
Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China; National Centre for International Research of Low-carbon and Green Buildings, Chongqing University, Chongqing 400045, China.
Bioresour Technol. 2015 Aug;190:51-6. doi: 10.1016/j.biortech.2015.04.035. Epub 2015 Apr 22.
This paper investigated the suspension properties of fine grit with different particle sizes in a bioreactor and developed a model to predict its effect on the ratio of mixed liquor volatile suspended solids to the mixed liquor suspended solids (MLVSS/MLSS) of activated sludge. The experimental results revealed that a smaller particle size corresponds to a larger suspension ratio, defined as the proportion of fine grit brought in by influent that is suspended in the activated sludge, and a smaller MLVSS/MLSS ratio. The model demonstrated that the effect of fine grit on the MLVSS/MLSS ratio is related to the fine grit concentration and chemical oxygen demand in influent and the observed sludge yield. However, fine grit has no influence on the activity of microorganisms. Wastewater treatment plants (WWTPs) can adjust MLSS based on the MLVSS/MLSS ratio to ensure the stability of MLVSS, which can achieve the stable operation of WWTPs.
本文研究了不同粒径细颗粒在生物反应器中的悬浮性能，并建立了一个模型来预测其对活性污泥中混合液挥发性悬浮固体与混合液悬浮固体（MLVSS/MLSS）之比的影响。实验结果表明，粒径越小，悬浮比越大，悬浮比定义为进水带入的细颗粒中悬浮在活性污泥中的部分与混合液悬浮固体（MLSS）的比例，以及较小的 MLVSS/MLSS 比值。该模型表明，细颗粒对 MLVSS/MLSS 比值的影响与细颗粒浓度和进水的化学需氧量以及观察到的污泥产率有关。然而，细颗粒对微生物的活性没有影响。污水处理厂（WWTP）可以根据 MLVSS/MLSS 比值调整 MLSS，以确保 MLVSS 的稳定性，从而实现 WWTP 的稳定运行。
