Effect of repeated addition of nitrite to semi-continuous activated sludge reactors
作者： S Philips
DOI: 10.1016/S0960-8524(01)00066-9
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摘要: To a semi-continuous lab-scale activated sludge system (SCAS), nitrite was dosed discontinuously, i.e. together with the feed. The added at concentration (50 mg N/l) which had been found earlier not to cause acute inhibition of general running reactors. Repeated addition, however, exerted an inhibitory effect reflected in decreased removal efficiencies and also expressed decreases total respiratory nitrifying activity 20% 40%, respectively. by reversible as improved after ceasing addition. two consecutive test runs revealed that addition gave rise high amounts dispersed cells free-swimming protozoa. Moreover, DGGE patterns confirmed shift microbial community structure upon application nitrite.
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