Department of Environmental Engineering and Chemistry, Rzeszow University of Technology, 6 Powstańców Warszawy Av, 35-959 Rzeszów, Poland.
Department of Water Purification and Protection, Rzeszow University of Technology, 6 Powstańców Warszawy Av, 35-959 Rzeszów, Poland.
Molecules. 2020 Jan 17;25(2):386. doi: 10.3390/molecules25020386.
This study aimed to evaluate and compare the physical, chemical and biological properties of aerobic granular sludge from reactors with the addition of different powdered mineral materials. These properties have a significant impact on the efficiency of systems in which the biomass in granular form is used. Four identical granular sequencing batch reactors (GSBRs) were adopted for the research performed on a laboratory scale (R1-control reactor; R2, R3 and R4-with materials, PK, PG and PL respectively). The results indicate that the addition of powdered mineral materials improved the properties of biomass in reactors. The SVI/SVI ratio values were significantly lower in the reactors with added materials (approx. 1.3 ± 0.3). The mean values of the sludge volume index at 30 min were the lowest in the R2 (39.8 ± 8.6 mL/g) and R4 (32.8 ± 10.7 mL/g) reactors. The settling velocity of biomass was the highest in the R2 reactor (15.4 ± 6.1 m/h). In the early days of the study, the highest extracellular polymeric substances (EPS) content was found in the biomass from the reactors to which the materials with higher Ca and Mg content were added (380.18-598.30 mg/g MLVSS). The rate of specific oxygen uptake (SOUR) by biomass indicated an insufficient biomass content in the R1 reactor-to 7.85 mg O/(g MLVSS∙h)-while in the reactors with materials, the SOUR values were at the higher levels.
本研究旨在评估和比较添加不同粉末矿物材料的反应器中好氧颗粒污泥的物理、化学和生物特性。这些特性对以颗粒形式使用生物量的系统的效率有重大影响。在实验室规模上进行了四项相同的好氧颗粒序批式反应器（GSBR）研究（R1-对照反应器；R2、R3 和 R4-分别添加材料 PK、PG 和 PL）。结果表明，添加粉末矿物材料改善了反应器中生物量的特性。添加材料的反应器中的 SVI/SVI 比值明显较低（约 1.3±0.3）。30 分钟时污泥体积指数的平均值在 R2（39.8±8.6mL/g）和 R4（32.8±10.7mL/g）反应器中最低。生物量的沉降速度在 R2 反应器中最高（15.4±6.1m/h）。在研究的早期阶段，发现添加具有较高 Ca 和 Mg 含量的材料的反应器中生物量的胞外聚合物物质（EPS）含量最高（380.18-598.30mg/g MLVSS）。生物量的比需氧量（SOUR）表明 R1 反应器中的生物量含量不足-为 7.85mg O/（g MLVSS∙h）-而在添加材料的反应器中，SOUR 值较高。
