Department of Science of Technology Innovation, Nagaoka University of Technology, Niigata 940-2188, Japan.
Department of Civil and Environmental Engineering, Nagaoka University of Technology, Niigata 940-2188, Japan.
Bioresour Technol. 2024 Sep;407:131102. doi: 10.1016/j.biortech.2024.131102. Epub 2024 Jul 15.
A novel bio-carrier, PVA/Fe/starch gel bead, was fabricated and developed to enhance the anaerobic treatment performance of synthetic azo dye-containing wastewater. PVA-gel beads with 5 % magnetite and 0.5 % starch were optimal for physical strength and treatment performance. A pair of 2 L-up-flow anaerobic sludge blankets (UASB), one with the bead (UB) and another without (U) as a controller, operated continuously at 30 °C and an HRT of 11-24 h for 302 days. UB showed better performance than U in most phases, especially with influent dye of 200 mg·L, suggesting a greater tolerance to dye toxicity of UB than U. Microbial analysis revealed that the PVA/Fe/starch gel beads successfully captured the dye degrader Clostridium. Diversity indices indicated that PVA/Fe/Starch gel beads effectively support microbial diversity and resilience under varying dye concentrations. Overall, these findings demonstrate the potential of PVA/Fe/Starch gel beads to improve the stability and efficiency of the dye treatment system.
一种新型生物载体 PVA/Fe/淀粉凝胶珠被制备和开发，以提高含有合成偶氮染料废水的厌氧处理性能。对于物理强度和处理性能，5%磁铁矿和 0.5%淀粉的 PVA 凝胶珠是最佳的。一对 2 L 上流式厌氧污泥床（UASB），一个带有珠（UB），另一个没有（U）作为对照，在 30°C 和 HRT 为 11-24 h 的条件下连续运行 302 天。UB 在大多数阶段的表现都优于 U，特别是当进水染料浓度为 200mg·L 时，表明 UB 比 U 对染料毒性有更大的耐受性。微生物分析表明，PVA/Fe/淀粉凝胶珠成功捕获了染料降解菌梭菌。多样性指数表明，PVA/Fe/Starch 凝胶珠在不同染料浓度下有效地支持微生物多样性和恢复能力。总的来说，这些发现表明 PVA/Fe/Starch 凝胶珠有潜力提高染料处理系统的稳定性和效率。
