硫代硫酸钠联合硫铁矿自养反硝化脱氮性能

周娅; 买文宁; 代吉华; 孙培彬; 曾令斌; 唐启

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中国环境科学 ›› 2020, Vol. 40 ›› Issue (5) : 2081-2086.

水污染与控制

硫代硫酸钠联合硫铁矿自养反硝化脱氮性能

周娅¹, 买文宁¹, 代吉华², 孙培彬², 曾令斌³, 唐启²

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Study on autotrophic denitrification performance of sodium thiosulfate combined with pyrite system

ZHOU Ya¹, MAI Wen-ning¹, DAI Ji-hua², SUN Pei-bin², ZENG Ling-bin³, TANG Qi²

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摘要

为了实现低C/N实际废水的快速、经济、高效脱氮，采用硫代硫酸钠联合硫铁矿处理生产抗生素的生化尾水，探讨该系统的脱氮性能及处理实际废水的可行性和稳定性，并采用高通量测序揭示系统内微生物群落.本文利用了3个完全相同的反硝化滤柱反应器，分别按照硫代硫酸钠投加量为理论计算量的1倍、0.75倍、0.5倍，对应填充200、400、400mL的硫铁矿.结果表明：HRT为0.75h时，前2个反应器对NO₃^--N的去除率依然保持在72%以上，而第3个反应器脱氮性能较差；3个反应器出水pH值基本在6.8 ~ 8.0之间，适宜硫自养微生物生存，无需额外补充碱度；硫代硫酸钠相比于硫磺，既可随时补充，又避免浪费，同时能改善微生物与电子供体之间的传质并减缓系统堵塞现象；3个反应器的功能菌属是Sulfurimonas和Thiobacillus，两者之和在3个系统中所占比例分别为27.32%、25.37%、18.4%.

Abstract

In order to achieve the rapid, economical and efficient denitrification of actual low C/N wastewater, sodium thiosulfate and pyrite was used to treat the biochemical tail water for antibiotic production. The denitrification performance, the feasibility and stability of this practical wastewater treatment system were explored, and the microbial community was revealed by high-throughput sequencing. In this paper, three identical denitrification filter column reactors were used to fill 200, 400 and 400mL of pyrite with sodium thiosulfate dosage of 1、0.75、0.5times of the theoretical amount. The results showed that the removal rate of NO₃^--N in the first two reactors remained above 72%, while the denitrification performance of the third reactor was poor. The effluent pH value of the three reactors was basically between 6.8 and 8.0, which was suitable for the survival of sulfur autotrophic microorganisms without additional alkalinity. Compared with sulfur, sodium thiosulfate not only can be replenished at any time and avoid waste, but also can improve mass transfer between microorganism and electron donors, and slow down the blocking phenomenon of the system; The functional bacteria in the three reactors were Sulfurimonas and Thiobacillus, accounting for 27.32%, 25.37% and 18.4% respectively.

导出引用

周娅, 买文宁, 代吉华, 孙培彬, 曾令斌, 唐启. 硫代硫酸钠联合硫铁矿自养反硝化脱氮性能[J]. 中国环境科学. 2020, 40(5): 2081-2086

ZHOU Ya, MAI Wen-ning, DAI Ji-hua, SUN Pei-bin, ZENG Ling-bin, TANG Qi. Study on autotrophic denitrification performance of sodium thiosulfate combined with pyrite system[J]. China Environmental Science. 2020, 40(5): 2081-2086

中图分类号： X703.1

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