Department of Civil Engineering, Laboratory of Environmental Sanitation, Federal University of Pernambuco, Av. Acadêmico Hélio Ramos, s/n. Cidade Universitária, Recife PE, Brazil.
Water Sci Technol. 2011;64(8):1581-9. doi: 10.2166/wst.2011.674.
An upflow anaerobic sludge bed (UASB)-submerged aerated biofilter (SAB) system that treats effluents from a jeans factory was evaluated. The 210-day operational period was divided into three phases (PI, PII and PIII), each with a different hydraulic retention time (HRT in h) and organic loading rate (OLR in kg COD/m3.d). In PI, the best performance was achieved using the UASB (HRT 24, OLR 1.3) with COD and color removal efficiencies of 59 and 64%, respectively; the corresponding values were 77 and 86% for the final effluent. In PII, the efficiencies were 50 and 55% using the UASB (HRT 16, OLR 1.2), respectively, and 69 and 81% for the final system effluent, respectively. In PIII, the UASB (HRT 12 and ORL 3.2) showed the poorest performance; the efficiencies decreased to 48 and 50%, respectively. The same phenomenon occurred in the system with corresponding efficiencies decreasing to 69 and 61%. Throughout the experiment, the system removal efficiencies were between 57 and 88% for nitrogen and between 14 and 63% for sulfate. The final effluent showed relatively non-toxicity or moderate toxicity using Daphnia magna as an indicator. Therefore, the overall results showed that the use of a sequential anaerobic-aerobic system is promising for treatment of textile industrial wastewater.
采用上流式厌氧污泥床（UASB）-淹没式曝气生物滤池（SAB）系统处理牛仔布厂废水，对其进行了评估。210 天的运行期分为三个阶段（PI、PII 和 PIII），每个阶段的水力停留时间（HRT，h）和有机负荷率（OLR，kg COD/m3.d）都不同。在 PI 阶段，UASB（HRT 24，OLR 1.3）的性能最佳，COD 和色度去除率分别为 59%和 64%；最终出水的相应值分别为 77%和 86%。在 PII 阶段，UASB（HRT 16，OLR 1.2）的效率分别为 50%和 55%，最终系统出水的效率分别为 69%和 81%。在 PIII 阶段，UASB（HRT 12 和 ORL 3.2）的性能最差；效率分别降至 48%和 50%。相应的系统效率也出现了同样的下降，分别降至 69%和 61%。在整个实验过程中，氮的去除效率在 57%至 88%之间，硫酸盐的去除效率在 14%至 63%之间。使用大型蚤作为指示生物，最终出水表现出相对无毒或中度毒性。因此，总体结果表明，采用顺序厌氧-好氧系统处理纺织工业废水具有广阔的前景。
