Low condition of dissolved oxygen (DO) is commonly associated with sludge bulking problem that was able to disrupt the efficiency of wastewater treatment performances. Relatively, very little attention was paid to the possibility of applying magnetic field in controlling the bulking problem. Hence, this study aims to investigate the performance of magnetic field on biomass properties and its effect on biodegradation under low condition of DO. Two continuous laboratory-scale sequencing batch reactors—Reactor A (SBR_A) and Reactor B (SBR_B)—were setup. SBR_A was equipped with the magnetic device to exhibit magnetic field of 88 mT, while SBR_B acted as a control system. The results showed that the biomass concentration in SBR_A was higher compared to SBR_B. High biomass concentration in SBR_A resulted to better settleability with mean SVI of less than 30 mL/g. SBR_A also showed consistently high removal performances of organic and inorganic contents compared to SBR_B. These observations confirmed that the magnetic field was able to enhance the biomass properties, which further enhance the biodegradation ability of the aerobic bacteria under low DO condition. This also indicates that under the sludge bulking circumstances, the use of magnetic field stands a great chance in maintaining high biodegradation of the treatment system.

低溶解氧 (DO) 条件通常与污泥膨胀问题有关，该问题能够破坏废水处理性能的效率。相对而言，很少有人关注施加磁场来控制膨胀问题的可能性。因此，本研究旨在研究磁场对低溶解氧条件下生物质特性的影响及其对生物降解的影响。设置了两个连续实验室规模的序批式反应器——反应器 A (SBR _A ) 和反应器 B (SBR _B )。SBR _A配备了磁性装置以显示 88 mT 的磁场，而 SBR _B作为控制系统。结果表明，SBR _A中的生物量浓度与 SBR _B相比更高。SBR _{A 中的}高生物量浓度导致更好的沉降性，平均 SVI 小于 30 mL/g。与 SBR _B相比，SBR _A还显示出始终如一的高去除有机和无机成分的性能。这些观察证实磁场能够增强生物质特性，从而进一步增强低溶解氧条件下需氧细菌的生物降解能力。这也说明在污泥膨胀的情况下，利用磁场保持处理系统的高生物降解性的机会很大。