Patent: A Printing And Dyeing Wastewater Treatment Process

Application (patent) No.: CN200810152153.2 filing date: 2008.10.08

? Open (Notice) No.: CN101381178 open (Notice) Date: 2009.03.11

? Main Key Words: C02F9/04 (2006.01) I Category Category:

? Key words: C02F9/04 (2006.01) I; C02F1/72 (2006.01) N

? Application (patent) by: Hebei University of Technology ? Address: Hongqiao District, Tianjin 300130, China Ding Zigu glorious, 8 ? National and provincial code: Tianjin; 12 ? Inventor (design) person: Zhao-Liang Wu; ZHANG Xiao; Luke; Radish ? Patent Proxy Organization: Intellectual Property Agency Co., Ltd. Tianjin Jia League ? Abstract: invent a printing and dyeing wastewater treatment process are wastewater treatment, it is the combination of foam separation technique to deal with Fenton oxidation of dye containing two or more printing and dyeing wastewater, concrete steps, including: a first step, with two or more dye printing and dyeing waste water collection and filtration; the second step, detection and pretreatment, detection of the dye contained in printing and dyeing wastewater and chemical oxygen demand pigment composition, color, pH value and the suspended solid content, with hydrochloric acid or sodium hydroxide to adjust its pH value to 6.0 ~ 8.0; third step bleaching process of foam separation, step up the wastewater treatment adding surfactant dodecyl trimethyl ammonium bromide, after the bubble column used in bleaching; The fourth step is the last step from wastewater Fenton. Treated wastewater COD meet the national emission standards. The process has to overcome the large area of printing and dyeing wastewater treatment and secondary pollution, color removal treatment efficiency is not high and volatile, complex and costly process, or failed to achieve the effect of the defects. ? Sovereignty items: a printing and dyeing wastewater treatment process, characterized in that: it is combined with a foam separation technique to deal with Fenton oxidation of dye containing two or more printing and dyeing wastewater, concrete steps are as follows: first, containing two or more dyes dyeing waste water collection and filtration collection includes two or more dyes and dyeing wastewater, by grating filters, which remove solids pass grille; the second step, with two or more dyes and dyeing wastewater pretreatment testing with the public to know detected by the first step to get the printing and dyeing wastewater contained in the dye pigment composition and the printing and dyeing wastewater chemical oxygen demand COD (mg / L), Chroma (times), pH value and the suspended solid content of SS (mg / L ), adjusted with hydrochloric acid or sodium hydroxide, pH value of the printing and dyeing wastewater to 6.0 to 8.0; the third step, the foam separation process by marking the second step of dyeing wastewater pretreatment dosage of surfactant dodecyl top three ammonium bromide, the dosage of surfactant dodecyl trimethylammonium bromide amount mg / L and that of dyeing wastewater color times the value of the ratio of 0.10 to 0.14:1, then the drum tower diameter of 32mm bubble tower bleaching, the temperature is 15 ~ 35 , gas volume flow rate of 0.02 ~ 0.05m3 / h, foam height 0.6 ~ 0.8m, with the method of breaking foam breaking of the foam layer liquid foam are breaking foam, filter the broken foam fluid, obtained by the filtration of the solid to be dealt with by filtering the filtrate from the main liquid layer and the bubble column effluent decolorization combined cycle operation of a bubble separation time of 20 ~ 30min; the fourth step, Fenton oxidation process The third step will be the combined wastewater from Fenton oxidation, the process is: first detection of the third step from the merger of the wastewater COD, then first join H2O2, then add FeSO4, Fe2 + and H2O2 to the molar ratio of 0.12 to 0.2: 1, H2O2 and COD mass ratio of 2 to 2.5:1, the reaction temperature is 20 ~ 35 , reaction time 30 ~ 40min, by so Fenton oxidation, the indicators can reach emission standards GB8978-1996 2 can be directly discharged; will result Fenton oxidation of solid precipitation and the third step of the proceeds from the filtered solids from the merger, and known by the public burning technology of sound processing. More exciting, please see>> Patent: A Printing And Dyeing Wastewater Treatment ProcessBy: betty

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