Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science & Technology, Tianjin 300457, China; Chemical Engineering Department, Lakehead University, Thunder Bay, ON, Canada.
Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science & Technology, Tianjin 300457, China.
Chemosphere. 2018 Nov;210:1-9. doi: 10.1016/j.chemosphere.2018.06.160. Epub 2018 Jun 27.
Sequential batch reactor (SBR) is a simple and flexible activated sludge process for industrial wastewater treatment. Also, biomass-based fly ash is a fairly plentiful and low-cost waste available in the pulp and paper industry. For treating wastewater of the pulping industry through a more efficient and economic approach, the integration of fly ash in the SBR process was investigated in this work. In this study, fly ash dosages of 0.2 wt% and 0.6 wt% were maintained in SBR1 and SBR2 systems, respectively, for treating the wastewater of the pulping industry. The findings indicated that adding fly ash to the bioreactors improved the settling and flocculation affinity of activated sludge without having any significant effect on the performance and the stability of the biological process. Lignin and color removals were 90.9% and 95% in SBR1 and 92.9% and 97.5% in SBR2, while the removals in the control reactor were 85.3% and 91.5%, respectively. The alkaline ions, such as Ca and Mg, leached out from fly ash, which improved the sludge's properties, and this leaching reduced 22.1% and 40.5% of alkali consumptions in SBR1 and SBR2, respectively. The structure of sludge flocs in the reactors with and without fly ash was also studied. This technology is environmental friendly, cost-effective and suitable for a full-scale implementation in existing aerobic biological processes.
序批式反应器（SBR）是一种用于工业废水处理的简单而灵活的活性污泥工艺。此外，基于生物质的粉煤灰是纸浆和造纸工业中相当丰富且低成本的废物。为了通过更高效和经济的方法处理制浆工业废水，本工作研究了将粉煤灰整合到 SBR 工艺中。在这项研究中，分别在 SBR1 和 SBR2 系统中维持粉煤灰的剂量为 0.2wt%和 0.6wt%，以处理制浆工业废水。结果表明，向生物反应器中添加粉煤灰可以提高活性污泥的沉降和絮凝亲和力，而对生物过程的性能和稳定性没有任何显著影响。在 SBR1 和 SBR2 中，木质素和颜色的去除率分别为 90.9%和 95%，而在对照反应器中的去除率分别为 85.3%和 91.5%。粉煤灰中浸出的碱性离子，如 Ca 和 Mg，改善了污泥的性质，这种浸出分别减少了 SBR1 和 SBR2 中碱消耗的 22.1%和 40.5%。还研究了有和没有粉煤灰的反应器中污泥絮体的结构。这项技术环保、经济实惠，适合在现有的好氧生物处理工艺中全面实施。
