碳源优配SBR工艺用于高含氮印染废水提标改造

Optimal distribution of carbon source in SBR for the upgrading of high nitrogen printing and dyeing wastewater

按照碳源优配原则优化分配进水流量,进行多段进水和进水比例可变条件下SBR脱氮效果研究。实验结果表明,采用SBR三段进水模式,当进水流量比为3∶2∶1时,系统脱氮效果最佳,此时NH4+-N、TN去除率分别为80.5%、67.4%。采用碳源优配原则对实际高氮印染废水处理工程进行提标改造,最终出水TN和NH4+-N均能达到《纺织染整工业水污染物排放标准》(GB 4278—2012)的间接排放标准。

According to the optimal distribution of carbon source,the effect of denitrification in an SBR was studied under the conditions of multi-stage water intake and variable water inlet ratio.The results showed that the denitrifica-tion effect of the system was the best when the SBR selected the three-stage water inflow mode and the optimal water inflow rate was 3∶2∶1 in the basin.Besides,the removal rate of NH4+-N and TN was 80.5%and 67.4%,respectively.The optimized carbon source distribution for SBR was conducted to upgrade the actual high-nitrogen printing and dye-ing wastewater treatment project.The TN and NH4+-N of effluent met the indirect emission standard of Discharge Stan-dard of Water Pollutants for Dyeing and Finishing of Textile Industry(GB 4278—2012).