通过芬顿氧化和膜生物反应器联合工艺对染色废水进行深度处理及回用。

Advanced treatment of dyeing wastewater towards reuse by the combined Fenton oxidation and membrane bioreactor process.

机构信息

State Key Laboratory of Chemical Engineering, East China University of Science and Technology (ECUST), Shanghai 200237, China.

出版信息

J Environ Sci (China). 2010;22(11):1657-65. doi: 10.1016/s1001-0742(09)60303-x.

DOI:10.1016/s1001-0742(09)60303-x

PMID:21235151

Abstract

The performance of combined Fenton oxidation and membrane bioreactor (MBR) process for the advanced treatment of an effluent from an integrated dyeing wastewater treatment plant was evaluated. The experimental results revealed that under the optimum Fenton oxidation conditions (initial pH 5, H2O2 dosage 17 mmol/L, and Fe2+ 1.7 mmol/L) the average total organic carbon (TOC) and color removal ratios were 39.3% and 69.5% after 35 min of reaction, respectively. Results from Zahn-Wallens Test also represented that Fenton process was effective to enhance the biodegradability of the test wastewater. As for the further purification of MBR process, TOC removal capacity was examined at different hydraulic retention times (HRT) of 10, 18 and 25 hr. Under the optimum HRT of 18 hr, the average TOC concentration and color of the final MBR effluent were 16.8 mg/L and 2 dilution time, respectively. The sludge yield coefficient was 0.13 g MLSS/g TOC and TOC degradation rate was 0.078 kg TOC/(m3 x day). The final effluent of MBR can meet the reuse criteria of urban recycling water - water quality standard for miscellaneous water consumption GBT18920-2002.

摘要

联合 Fenton 氧化和膜生物反应器（MBR）工艺对综合印染废水处理厂出水进行深度处理的性能进行了评估。实验结果表明，在最佳 Fenton 氧化条件（初始 pH 值 5、H2O2 用量 17 mmol/L 和 Fe2+ 1.7 mmol/L）下，反应 35 分钟后，TOC 和色度的平均去除率分别为 39.3%和 69.5%。Zahn-Wallens 测试结果还表明，Fenton 工艺能有效提高废水的可生化性。对于 MBR 工艺的进一步净化，在不同水力停留时间（HRT）为 10、18 和 25 小时的条件下考察了 TOC 的去除能力。在最佳 HRT 为 18 小时的条件下，MBR 出水中 TOC 的平均浓度和色度分别为 16.8 mg/L 和 2 稀释倍数。污泥产率系数为 0.13 g MLSS/g TOC，TOC 降解率为 0.078 kg TOC/（m3·d）。MBR 的最终出水可满足城市回用水-杂用水水质标准 GBT18920-2002 的回用标准。