Nitrogen removal of high strength wastewater via nitritation/denitritation using a sequencing batch reactor.
Nitrogen removal of high strength wastewater via nitritation/denitritation using a sequencing batch reactor.
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DOI：
10.2166/wst.2004.0601
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发表时间：
2004-11
期刊：
影响因子：
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通讯作者：
E. Lai;S. Senkpiel;D. Solley;Jurg Keller
中科院分区：
文献类型：
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作者：
E. Lai;S. Senkpiel;D. Solley;Jurg Keller
采用序批式反应器（SBR）工艺概念，在实验室和中试条件下通过亚硝酸盐实现高效的氨氮去除。两组实验结果表明，在没有pH控制或碳添加的情况下，亚硝化过程始终将约50%的来自生物固体脱水液体的铵转化为亚硝酸盐，水力停留时间（HRT）短至10 h。中试规模研究的结果还表明，铵选择性氧化为亚硝酸盐是一个可靠的过程，因为在330天的试验期间，硝酸盐的积累从来都不是问题。在实验室规模下，SBR工艺的概念被扩展到通过亚硝化和反硝化实现完全脱氮。实验结果表明，在水力停留时间为1.1 d，去除率为1.05 kgNm（-3）d（-1）的条件下，生物固体脱水液（进水浓度一般为1,200 g m（-3））中氨氮的去除率可达96-98%。该工艺概念在中试规模下进行了测试，其中亚硝化工艺可以在短时间内在没有温度控制的情况下启动。在水力停留时间为0.88 d时，脱氮率可达1.2 kgNm（-3）d（-1）。试验装置中所需的COD与氮的比例始终在1.6-1.9 kgCOD kg（-1）N去除范围内。
The sequencing batch reactor (SBR) process concept was applied to achieve efficient ammonium removal via nitrite under both laboratory and pilot-scale conditions. Both sets of experimental results show that without pH control or carbon addition the nitritation process consistently converted approximately 50% of the ammonium from biosolids dewatering liquids to nitrite with hydraulic retention times (HRT) as short as 10 h. The results from the pilot-scale study also indicate that the selective oxidation of ammonium to nitrite is a reliable process as the accumulation of nitrate was never an issue during a 330-day trial. The SBR process concept was extended to achieve complete nitrogen removal through nitritation and denitritation in the laboratory scale. The experimental results indicate that a total reduction of 96-98% of the ammonium nitrogen from biosolids dewatering liquids (influent concentration typically 1,200 g m(-3)) was achieved with a short HRT of 1.1 d and a removal rate of 1.05 kgNm(-3)d(-1). This process concept was tested at pilot scale where the nitritation process could be started up without temperature control in a short period of time. Nitrogen removal rates up to 1.2 kgNm(-3)d(-1) at an HRT of 0.88 d have been obtained. COD to nitrogen ratios required in the pilot plant were consistently in the range 1.6-1.9 kgCOD kg(-1)N removed.