Chemical Engineering Department, Sarvajanik College of Engineering and Technology, Surat, Gujarat, India.
Environ Technol. 2011 Aug-Sep;32(11-12):1247-57. doi: 10.1080/09593330.2010.534821.
The objective of this study was to investigate the performance of a laboratory-scale submerged membrane bioreactor (SMBR) system for the treatment of synthetic textile wastewater containing disperse red dye. The SMBR system was run aerobically in a continuous flow mode at five different hydraulic retention times (HRTs) of 24,18,14.4,11.28 and 8.4 h respectively, with an average permeate flux of 20 L/(m2 x h). The performance of the system was not adversely affected by decreased HRT and the consequent rise in the food/microorganism ratio (0.07 to 0.14 g BOD/(g SS x d)) and organic loading rate (OLR: 0.4 to 1.24 BOD kg/(m3 x d)). The average removal rate for COD, BOD and colour were 92.33%, 93.69% and 91.36%, respectively. To maintain a stable flux and prevent fouling, the membrane was covered with a cylindrical wire-mesh cage, and routine chemical backwashing and chemical cleaning procedures were adapted. Transmembrane pressure increased from 29.47 to 58.42 kPa (0.29 to 0.58 bar) during each run of HRT. The results indicated that synthetic textile wastewater could be treated very effectively by the SMBR system.
本研究旨在考察实验室规模的浸没式膜生物反应器（SMBR）系统处理含有分散红染料的合成纺织废水的性能。SMBR 系统在不同的水力停留时间（HRT）下以连续流模式运行，分别为 24、18、14.4、11.28 和 8.4 h，平均渗透通量为 20 L/（m2 x h）。系统的性能并未受到 HRT 降低和随之而来的食物/微生物比例（0.07 至 0.14 g BOD/（g SS x d））和有机负荷率（OLR：0.4 至 1.24 BOD kg/（m3 x d））上升的不利影响。COD、BOD 和颜色的平均去除率分别为 92.33%、93.69%和 91.36%。为了保持稳定的通量并防止堵塞，膜被圆柱形金属丝网笼覆盖，并采用了常规的化学反冲洗和化学清洗程序。在每个 HRT 运行期间，跨膜压力从 29.47 增加到 58.42 kPa（0.29 至 0.58 巴）。结果表明，SMBR 系统可以非常有效地处理合成纺织废水。
