Determination effect of influent salinity and inhibition time on partial nitrification in a sequencing batch reactor treating saline sewage
Determination effect of influent salinity and inhibition time on partial nitrification in a sequencing batch reactor treating saline sewage
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DOI：
10.1016/j.desal.2009.01.005
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发表时间：
2009-09
期刊：
影响因子：
9.9
通讯作者：
L. Ye;C. Peng;B. Tang;Shu-ying Wang;Kai Zhao;Yongzhen Peng
中科院分区：
文献类型：
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作者：
L. Ye;C. Peng;B. Tang;Shu-ying Wang;Kai Zhao;Yongzhen Peng
随着海水使用量的增加，必须处理含盐污水以保护海洋。以真实的含盐生活污水为研究对象，考察了进水盐度和抑制时间对短程脱氮的影响，并检测了SBR工艺中活性污泥中硝化菌的性能。微生物试验用于确定盐抑制机理。在盐抑制阶段期间和之后记录盐的动态响应。由于微生物种群测试支持NOB在低于1%（w/v）盐含量下被强烈抑制，因此在三个平行SBR中分别施加三种不同的盐水平（0.52%、0.76%和1.02%）60天。结果表明：加盐后，NAR均提高了95%，并在第15、7、2天后保持稳定。氨在盐含量低于0.75%的稳定状态下几乎完全降解;然而，在1.02%时几乎降解一半。停止加盐后，1.02%体系的ARE在第18次循环时达到94.3%，SAUR均明显增加。0.52%和0.76%系统的NAR在第9和第20个周期有所下降，但1.02%系统仍保持在95%以上。在SBR系统中，为了获得稳定的短程硝化，盐度大于0.76%，盐抑制时间大于60天的条件是非常有竞争力的，有利于应用。
With an increase in using seawater, saline sewage is necessarily disposed of to protect the ocean. The objective in this work is to evaluate the effect of influent salinity and inhibition time on short-cut nitrogen removal from real domestic saline sewage, and to detect the performance of nitrifiers in activated sludge in SBR. Microbial tests are used to establish the mechanism of salt inhibition. Dynamic response of salt is recorded during and after the salt inhibition stage. As microbial population tests support that NOB is strongly inhibited below 1% (w/v) salt content, three different salt levels (0.52%, 0.76% and 1.02%) are applied respectively in three parallel SBRs for 60 days. Results reveal that NARs all increase by 95% and keep steady after the 15th, 7th and 2nd day by adding salt. Ammonia is almost totally degraded at the steady state at salt levels below 0.75%; however, it degrades nearly half at 1.02%. After stopping salt addition, the ARE in a 1.02% system reaches 94.3% at the 18th cycle and the SAURs all apparently increase. The NAR in 0.52% and 0.76% systems decreases at the 9th and 20th cycle but still keeps above 95% in the 1.02% system. In order to gain steady shot-cut nitrification in a SBR, conditions of salinity greater than 0.76% and salt inhibition for more than 60 days are very competitive and favorable for application.