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Efficient treatment of alizarin yellow R contained wastewater in an electrostimulated anaerobic-oxic integrated system.
Environmental Research ( IF 7.7 ) Pub Date : 2020-03-16 , DOI: 10.1016/j.envres.2020.109403
Zhi-Ling Li 1 , Kai Sun 2 , Fan Chen 1 , Xiao-Qiu Lin 1 , Cong Huang 1 , Zheng Yao 1 , Dan Chen 3 , Ting Xia 3 , Zhi-Xing Xiao 3 , Ai-Jie Wang 4
Affiliation  

An electrostimulated anaerobic-oxic integrated system was constructed for treating alizarin yellow R (AYR) containing wastewater. In electro-stimulated anaerobic unit, AYR decolorization efficiency improved from 51.2% to 96.6%. Two amination metabolites, p-phenylenediamine and 5-aminosalicylic acid, went through oxidation, ammonification and mineralization in oxic unit. Electro-stimulation promoted denitrification and COD removal efficiencies by 15.5% and 8.6%, respectively. A 20% improved nitrification efficiency was observed in oxic unit, due to elimination of AYR toxicity inhibition. No corrosion of heat-treated stainless steel occurred during the 60 days of continuous operation. Electrons sunk in denitrification and decolorization accounted for 34.4-36.8% of those released from COD removal, and 7.3% increase of removed nitrogen in nitrogenous compounds (AYR, nitrate and ammonia) was found. Electro-stimulated anaerobic unit predominated with fermentation and denitrification genera (Propionispira, Rhodocyclus, etc.) and aboundance of electro-active decolorization genus (Desulfovibrio, etc.) increased. Ammonia-oxidizing genus, Comamonas, was the most abundant in aerobic unit. Compared to the suspension, the electrostimulation could increased the abundance of electro-active genera in cathodic biofilm. This study revealed the feasibility of applying electro-stimulation and the conversion laws of nitrogenous organics in secondary bio-treatment system for treating toxic nitrogenous organics-contained wastewater.

中文翻译:

电刺激厌氧-氧气集成系统中有效处理茜素黄R所含废水。

构建了一个电刺激的厌氧-氧气集成系统,用于处理含茜素黄R(AYR)的废水。在电刺激的厌氧装置中,AYR的脱色效率从51.2%提高到96.6%。对氨基苯二胺和5-氨基水杨酸这两种胺化代谢产物在氧化单元中进行了氧化,氨化和矿化。电刺激分别使反硝化和COD去除效率提高了15.5%和8.6%。由于消除了AYR毒性抑制作用,在有氧装置中观察到硝化效率提高了20%。在连续运行的60天中,热处理的不锈钢没有发生腐蚀。在反硝化和脱色中沉没的电子占从COD去除释放的电子的34.4-36.8%,以及7。发现含氮化合物(AYR,硝酸盐和氨水)中去除的氮增加了3%。以发酵和反硝化属(丙酸螺菌属,杜鹃花属等)为主的电刺激厌氧单位和电活性脱色属(脱硫弧菌等)的丰富性增加。氨氧化属Comamonas是有氧单位中含量最丰富的。与悬浮液相比,电刺激可以增加阴极生物膜中电活性属的丰度。这项研究揭示了在二次生物处理系统中应用电刺激和含氮有机物转化规律处理含氮有机物的有毒废水的可行性。以发酵和反硝化属(丙酸螺菌属,杜鹃花属等)为主的电刺激厌氧单位和电活性脱色属(脱硫弧菌等)的丰富性增加。氨氧化属Comamonas是有氧单位中含量最高的。与悬浮液相比,电刺激可以增加阴极生物膜中电活性属的丰度。这项研究揭示了在二次生物处理系统中应用电刺激和含氮有机物转化规律处理含氮有机物的有毒废水的可行性。以发酵和反硝化属(丙酸螺菌属,杜鹃花属等)为主的电刺激厌氧单位和电活性脱色属(脱硫弧菌等)的丰富性增加。氨氧化属Comamonas是有氧单位中含量最高的。与悬浮液相比,电刺激可以增加阴极生物膜中电活性属的丰度。这项研究揭示了在二次生物处理系统中应用电刺激和含氮有机物转化规律处理含氮有机物有毒废水的可行性。电刺激可以增加阴极生物膜中电活性属的丰度。这项研究揭示了在二次生物处理系统中应用电刺激和含氮有机物的转化规律处理含氮有机物的有毒废水的可行性。电刺激可以增加阴极生物膜中电活性属的丰度。这项研究揭示了在二次生物处理系统中应用电刺激和含氮有机物转化规律处理含氮有机物的有毒废水的可行性。
更新日期:2020-03-16
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