Department of Environmental Engineering, Faculty of Civil Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia.
Water Res. 2011 Oct 15;45(16):4711-21. doi: 10.1016/j.watres.2011.05.012. Epub 2011 May 20.
The physical characteristics, microbial activities and kinetic properties of the granular sludge biomass were investigated under the influence of different hydraulic retention times (HRT) along with the performance of the system in removal of color and COD of synthetic textile wastewater. The study was conducted in a column reactor operated according to a sequential batch reactor with a sequence of anaerobic and aerobic reaction phases. Six stages of different HRTs and different anaerobic and aerobic reaction time were evaluated. It was observed that the increase in HRT resulted in the reduction of organic loading rate (OLR). This has caused a decrease in biomass concentration (MLSS), reduction in mean size of the granules, lowered the settling ability of the granules and reduction of oxygen uptake rate (OUR), overall specific biomass growth rate (ìoverall), endogeneous decay rate (kd) and biomass yield (Yobs, Y). When the OLR was increased by adding carbon sources (glucose, sodium acetate and ethanol), there was a slight increase in the MLSS, the granules mean size, ìoverall, and biomass yield. Under high HRT, increasing the anaerobic to aerobic reaction time ratio caused an increase in the concentration of MLSS, mean size of granules and lowered the SVI value and biomass yield. The ìoverall and biomass yield increased with the reduction in anaerobic/aerobic time ratio. The HRT of 24 h with anaerobic and aerobic reaction time of 17.8 and 5.8 h respectively appear to be the best cycle operation of SBR. Under these conditions, not only the physical properties of the biogranules have improved, the highest removal of color (i.e. 94.1±0.6%) and organics (i.e. 86.5±0.5%) of the synthetic textile dyeing wastewater have been achieved.
考察了不同水力停留时间（HRT）对颗粒污泥生物量的物理特性、微生物活性和动力学特性的影响，以及该系统对合成纺织废水的脱色和 COD 去除性能。该研究在按序批式反应器运行的柱式反应器中进行，该反应器具有厌氧和好氧反应阶段的顺序。评估了不同 HRT 和不同厌氧和好氧反应时间的六个阶段。结果表明，HRT 的增加导致有机负荷率（OLR）降低。这导致生物量浓度（MLSS）降低、颗粒平均粒径减小、颗粒沉降能力降低、耗氧速率（OUR）降低、总体比生物量增长率（ìoverall）、内源性衰减率（kd）和生物量产率（Yobs，Y）降低。当通过添加碳源（葡萄糖、乙酸钠和乙醇）增加 OLR 时，MLSS、颗粒平均粒径、ìoverall 和生物量产率略有增加。在高 HRT 下，增加厌氧到好氧反应时间比会导致 MLSS、颗粒平均粒径和降低 SVI 值和生物量产率增加。ìoverall 和生物量产率随厌氧/好氧时间比的降低而增加。HRT 为 24 h，厌氧和好氧反应时间分别为 17.8 和 5.8 h，似乎是 SBR 的最佳循环操作。在这些条件下，不仅生物颗粒的物理性质得到了改善，而且对合成纺织染料废水的脱色率（即 94.1±0.6%）和有机物去除率（即 86.5±0.5%）达到最高。
