Sowndarya S, Kanmani S, Raj S Amal
Research scholar, Centre for Environmental Studies, College of Engineering Guindy, Anna University, Chennai, Tamil Nadu, India.
Centre for Environmental Studies, College of Engineering Guindy, Anna University, Chennai, Tamil Nadu, India.
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2020;55(13):1548-1562. doi: 10.1080/10934529.2020.1826239. Epub 2020 Sep 29.
This study investigates the effectiveness of SBBR with low-cost textile fibers-based bio-carrier namely polypropylene fibers for the treatment of real sewage. The influent loading rates of COD, TN, and TP were averaged at 0.2780, 0.0170, and 0.0077 kg/m.d, respectively. The removal efficiencies of BOD, COD, TN, and TP recorded in SBBR were 98%, 93%, 82%, and 44%, respectively at an aeration time of 4 h. The TN and TP removal achieved in SBBR were 2.05 and 2.75 times, respectively higher than SBR. The COD removal efficiency was more than 90% under all SRT conditions (10, 14, 18, 22, and 26 d) in SBBR, and the highest efficiency of 93% was obtained at an SRT of 22 days. As the SRT increased, the nitrogen and phosphorus removal decreased, because the denitrification rate and phosphorus release and uptake rate decreased at longer SRT. Simultaneous nitrification and denitrification (SND) efficiency was 85% in SBBR and 44% in SBR, indicating the co-existence of aerobic nitrifiers and anoxic denitrifiers in the biofilm reactor. In SBBR, the nitrogen mass balance showed 74% of nitrogen removed by denitrification, 9% was removed through sludge wasting process, and 13% was removed in effluent at an SRT of 22 days and DO concentration of 3 mg/L. The t-test results suggest that the performance of SBBR was better than SBR in nitrogen and phosphorus removal at a 95% confidence interval.
本研究考察了以低成本纺织纤维基生物载体（即聚丙烯纤维）的序批式生物膜反应器（SBBR）处理实际污水的效果。化学需氧量（COD）、总氮（TN）和总磷（TP）的进水负荷率分别平均为0.2780、0.0170和0.0077kg/m·d。在曝气时间为4小时时，SBBR中记录的生化需氧量（BOD）、COD、TN和TP的去除效率分别为98%、93%、82%和44%。SBBR中实现的TN和TP去除率分别比序批式反应器（SBR）高2.05倍和2.75倍。在SBBR中所有污泥龄（SRT）条件（10、14、18、22和26天）下，COD去除效率均超过90%，在SRT为22天时获得了最高效率93%。随着SRT的增加，氮和磷的去除率下降，因为在较长的SRT下反硝化速率以及磷的释放和吸收速率降低。SBBR中的同步硝化反硝化（SND）效率为85%，SBR中为44%，表明生物膜反应器中存在好氧硝化菌和缺氧反硝化菌。在SBBR中，氮质量平衡表明，在SRT为22天且溶解氧（DO）浓度为3mg/L时，74%的氮通过反硝化去除，9%通过排泥过程去除，13%在出水中去除。t检验结果表明，在95%置信区间内，SBBR在氮和磷去除方面的性能优于SBR。
