采用水力空化与高级氧化试剂相结合的方法处理纺织印染工业废水。
Treatment of textile dyeing industry effluent using hydrodynamic cavitation in combination with advanced oxidation reagents.
机构信息
Department of Chemical Engineering, MNIT, Jaipur, 302017, India.
Department of Chemical Engineering, MNIT, Jaipur, 302017, India.
出版信息
J Hazard Mater. 2018 Feb 15;344:1109-1115. doi: 10.1016/j.jhazmat.2017.12.005. Epub 2017 Dec 5.
Treatment of textile dyeing industry (TDI) effluent was investigated using hydrodynamic cavitation (HC) and in combination with advanced oxidation reagents such as air, oxygen, ozone and Fenton's reagent. Slit venturi was used as the cavitating device in HC reactor. The effects of process parameters such as inlet pressure, cavitation number, effluent concentration, ozone and oxygen flow rate, loading of HO and Fenton's reagent on the extent of reduction of TOC, COD and color were studied. Efficiency of the hybrid treatment processes were evaluated on the basis of their synergetic coefficient. It was observed that almost 17% TOC, 12% COD, and 25% color removal was obtained using HC alone at inlet pressure of 5bar and pH of 6.8. The rate of reduction of TOC and COD decreased with dilution of the samples. HC in combination with Fenton's reagent (FeSO·7HO:HO as 1:5) was most effective with reduction of 48%TOC and 38% COD in 15min and 120min respectively with almost complete decolorization (98%) of the TDI effluent. Whereas HC in combination with oxygen (2L/min) and ozone (3g/h) produced reduction of 48% TOC, 33% COD, 62% decolorization and 48% TOC, 23% COD, 88%, decolorization of TDI effluent respectively.
采用水力空化（HC）并结合空气、氧气、臭氧和芬顿试剂等高级氧化试剂处理纺织印染工业（TDI）废水。在 HC 反应器中，采用狭缝文丘里管作为空化装置。研究了进口压力、空化数、废水浓度、臭氧和氧气流量、HO 和芬顿试剂负荷等工艺参数对 TOC、COD 和色度去除率的影响。根据协同系数评价了混合处理工艺的效率。结果表明，在进口压力为 5bar、pH 值为 6.8 时，单独使用 HC 可去除约 17%的 TOC、12%的 COD 和 25%的色度。随着样品稀释，TOC 和 COD 的去除率降低。HC 与芬顿试剂（FeSO·7HO：HO 为 1:5）联合使用最为有效，可在 15min 和 120min 内分别将 TOC 和 COD 的去除率降低 48%和 38%，几乎可完全脱色（98%）。而 HC 与氧气（2L/min）和臭氧（3g/h）联合使用，可使 TOC、COD、色度的去除率分别达到 48%、33%、62%和 48%、23%、88%。
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