Nitrogen removal performance of anaerobic ammonia oxidation (ANAMMOX) in presence of organic matter |
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Authors: | Weiqiang Zhu Peiyu Zhang Deshuang Yu Huiyu Dong Jin Li |
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Affiliation: | 1.School of Environmental Science and Engineering,Qingdao University,Qingdao,China;2.Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-environmental Sciences,University of Chinese Academy of Sciences, Chinese Academy of Sciences,Beijing,China |
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Abstract: | A sequencing batch reactor (SBR) was used to test the nitrogen removal performance of anaerobic ammonium oxidation (ANAMMOX) in presence of organic matter. Mesophilic operation (30 ± 0.5 °C) was performed with influent pH 7.5. The results showed, independent of organic matter species, ANAMMOX reaction was promoted when COD was lower than 80 mg/L. However, specific ANAMMOX activity decreased with increasing organic matter content. Ammonium removal efficiency decreased to 80% when COD of sodium succinate, sodium potassium tartrate, peptone and lactose were 192.5, 210, 225 and 325 mg/L, respectively. The stoichiometry ratio resulting from different OM differed largely and R1 could be as an indicator for OM inhibition. When COD concentration was 240 mg/L, the loss of SAA resulting from lactose, peptone, sodium potassium tartrate and sodium succinate were 28, 36, 50 and 55%, respectively. Sodium succinate had the highest inhibitory effect on SAA. When ANAMMOX process was used to treat wastewater containing OM, the modified Logistic model could be employed to predict the NREmax. |
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