3BER反应器极板面积和布置形式对脱氮效果的影响

发布时间：2018-10-24 15:20

【摘要】：为提高三维电极生物膜工艺(3BER)脱氮效率及出水水质,通过增大极板面积、减少极板间距、改变电极布置形式,构建了新型三维电极生物膜反应器(3BER-NC)用于城市污水厂尾水深度脱氮处理,研究了电流、进水p H和ρ(C)/ρ(N)对其运行效果的影响,并分析了系统中反硝化菌群分布特征.研究结果表明:减少极板间距能减缓碳棒阳极电解,出水色度低,能在较高的电流下运行,3BER-NC最佳运行电流为200 m A,比3BER反应器高出100m A.增大极板面积和改变极板位置分布有利于反硝化反应的进行,TN平均去除率提高约37.74%.电流强度、进水p H和ρ(C)/ρ(N)对系统脱氮效果均有较大影响,在不同运行条件下3BER-NC体系的脱氮效率均优于3BER.在3BER-NC体系中β变形菌起主导作用,脱氮主要是由异养和自养反硝化菌共同作用的结果.
[Abstract]:In order to improve the denitrification efficiency and effluent quality of three dimensional electrode biofilm process (3BER), the electrode layout was changed by increasing the plate area, reducing the distance between the plates, and changing the electrode layout. A novel three dimensional electrode biofilm reactor (3BER-NC) was constructed for deep denitrification in the tail water of municipal wastewater treatment plant. The effects of current, influent pH and 蟻 (C) / 蟻 (N) on the operation efficiency were studied, and the distribution characteristics of denitrifying bacteria in the system were analyzed. The results show that reducing the distance between electrode plates can slow down the anode electrolysis of carbon rod, and the chroma of effluent is low and can be operated at a higher current. The optimum operating current of 3BER-NC is 200mA, which is 100 Ma higher than that of 3BER reactor. Increasing the plate area and changing the distribution of the polar plate are beneficial to the denitrification reaction, and the average removal rate of TN is increased by about 37.74%. The current intensity, influent pH and 蟻 (C) / 蟻 (N) have great influence on the denitrification efficiency of the system, and the denitrification efficiency of 3BER-NC system is better than that of 3BERunder different operating conditions. 尾 -Proteus plays a leading role in 3BER-NC system, and denitrification is mainly caused by heterotrophic and autotrophic denitrifying bacteria.
【作者单位】：北京工业大学北京市水质科学与水环境恢复工程重点实验室;中国电力技术装备有限公司郑州电力设计院;
【基金】：国家自然科学基金资助项目(51378028)
【分类号】：X703

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