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Analysis of laboratory scale nitriation reactor using sludge thickener supernatant
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  • Journal title : Journal of Wetlands Research
  • Volume 17, Issue 4,  2015, pp.414-420
  • Publisher : Korean Wetlands Society
  • DOI : 10.17663/JWR.2015.17.4.414
 Title & Authors
Analysis of laboratory scale nitriation reactor using sludge thickener supernatant
Im, Jiyeol; Gil, Kyungik;
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Nitrogen is one of main causes to induce eutrophication of water system and one of contaminants that must be treated for protection of water system. In this study, it was intended to identify a method to increase operation efficiency of municipal wastewater treatment plant (MWTP) by treating high concentration nitrogen. A laboratory scale reactor was operated by using sludge thickener supernatant in the MWTP. During operation of the laboratory scale reactor, it was intended to induce stable nitritation and analyze effects of related operation factors. As results, it was shown that the nitiritation could be induced artificially through control of retention time and sections where the stable nitiritation was induced were identified also. In particular, highly efficient nitrite conversion efficiency near 90% was identified in condition of 1 day retention time. Especially, it was shown that ammonium nitrogen load affected ammonium nitrogen removal efficiency and nitrite conversion efficiency. In the condition of high ammonium nitrogen load, the nitrite conversion efficiency and the ammonium nitrogen removal efficiency decreased. On the contrary in the condition of low ammonium nitrogen load, it was found that the nitrite conversion efficiency decreased. It means that control of ammonium nitrogen concentration and its retention time is needed for the nitritation. It is considered that for the sewage containing high load nitrogen in sludge treatment process as like the sludge thickener supernatant, the nitritation can be applied, which can be suggested as a modification method of MWTP.
Municipal wastewater treatement plant;recycle water;Sludge thickener;nitritation;nitrogen removal;
 Cited by
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