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J Environ Qual

Title:		Partial nitritation of swine wastewater in view of its coupling with the anammox process
Author(s):		Magri A; Vanotti MB; Szogi AA; Cantrell KB;
Address:		"USDA-ARS Coastal Plains Soil, Water and Plant Research Center, Florence, SC, USA. albert.magri@gmail.com"
Journal Title:		J Environ Qual
Year:		2012
Volume:		41
Issue:		6
Page Number:		1989 - 2000
DOI:		10.2134/jeq2012.0092
ISSN/ISBN:		0047-2425 (Print) 0047-2425 (Linking)
Abstract:		"Partial nitritation (PN) of swine wastewater was investigated in a sequencing batch reactor (SBR) using a high-performance nitrifying sludge. Characteristics of the wastewater used were low content of biodegradable organic matter and a high alkalinity-to-ammonium ratio. The target oxidation of ammonium nitrogen (NH-N) to nitrite nitrogen (NO-N) was 57% (1.32 g NO-N g NH-N), which corresponds with the reaction ratio of the anaerobic ammonium oxidation (anammox). This target was successfully achieved at 32 degrees C by controlling the inflow rate and the corresponding nitrogen loading rate (NLR). An average NLR of 1.47 g NH-N L d was applied to the partial nitritation sequencing batch reactor during a period of 70 d. The nitrite production rate obtained was 0.91 g NO-N L d. No nitrate was produced. The PN effluent contained 1.38 g NO-N g NH-N, which was within 5% of the target ratio. Under steady composition of the wastewater, the pH was shown to be a good indicator of the PN process performance. Furthermore, in a second sequencing batch reactor, the anaerobic ammonium oxidation process was effectively applied to the PN effluent, attaining a nitrogen conversion rate of 0.36 g N L d (14.3 mg N g volatile suspended solids h)"
Keywords:		"Anaerobiosis Animals Bacteria/metabolism Bioreactors Environmental Monitoring Hydrogen-Ion Concentration Nitrates Oxidation-Reduction Oxygen Consumption Quaternary Ammonium Compounds *Swine Time Factors Waste Disposal, Fluid/*methods Water Pollutants, Che;"
Notes:		"MedlineMagri, Albert Vanotti, Matias B Szogi, Ariel A Cantrell, Keri B eng 2012/11/07 J Environ Qual. 2012 Nov-Dec; 41(6):1989-2000. doi: 10.2134/jeq2012.0092"