期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2019
卷号：237
期号：2
页码：022032
DOI：10.1088/1755-1315/237/2/022032
出版社：IOP Publishing
摘要：This paper reports the microbial nitrogen removal, flocculation and decolorization purification technology of high-salt nitrogenous printing and dyeing wastewater. The combined microbial flora was used to perform simultaneous nitrification and denitrification (SND) nitrogen removal for high-salt nitrogenous printing and dyeing wastewater. When the sodium acetate was the carbon source and C:N was set to 7.5:1, the concentration of -N was reduced from the initial 2000.0 mg/L to 18.0 mg/L and the nitrogen removal rate was 99.1% and the nitrogen removal efficiency was 16.5 mg L−1 h−1 at 120 h. Poly aluminum chloride (PAC) was the suitable flocculant. Under the optimized conditions that the dosage of PAC was 0.5 g/L and the flocculation time was 10 min, the flocculation rate reached 96.5%. Among the four decolorization methods of ozone, 84 disinfectant, hydrogen peroxide and chlorine dioxide, the decolorization effect of ozone oxidation was superior. When the production of ozone was 167 mg/min and the reaction time was 4 min, the decolorization rates all of neutral red, acid green and methyl orange could reach over 94.0%. This study provides theoretical and technical support for the purification of high-salt nitrogenous printing and dyeing wastewater.
