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Open AccessArticle

Optimization of Nitrogen Removal in Solid Carbon Source SND for Treatment of Low-Carbon Municipal Wastewater with RSM Method

1
School of Civil Engineering, Guangzhou University, Guangzhou 510006, China
2
Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou 510006, China
3
School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
*
Author to whom correspondence should be addressed.
Water 2018, 10(7), 827; https://doi.org/10.3390/w10070827
Received: 12 May 2018 / Revised: 9 June 2018 / Accepted: 19 June 2018 / Published: 22 June 2018
(This article belongs to the Special Issue Water Pollution and Treatment: Challenges and Opportunities)
In this work, a loofah sponge was used as the solid carbon source and the carrier in a biofilm reactor. Simultaneous nitrification and denitrification (SND) technology was used to achieve nitrogen removal in low-carbon municipal wastewater in a sequencing batch biofilm reactor (SBBR). At room temperature, the effects of filling ratio, dissolved oxygen (DO), pH, C/N(CODCr/TN), and aeration time on the removal of nitrogen were systematically studied. In addition, the removal efficiency of total nitrogen (TN) was used as the evaluation index in response surface models (RSM) for optimization of nitrogen removal. The results showed that DO, pH, and aeration time affected nitrogen removal significantly. Therefore, DO, pH, and aeration time were used as the independent variables in RSM. The optimum conditions for nitrogen removal were found to be as follows in RSM: DO = 4.09 mg/L, pH = 7.58, aeration time = 10.47 h. Under the optimum conditions, the maximum TN removal efficiency reached 86.27%. The results also demonstrated that the deviation between the experimental and predicted TN removal efficiency was only 0.58%, the predicted model was reliable for future application. View Full-Text
Keywords: solid carbon source; simultaneous nitrification and denitrification; low-carbon wastewater; nitrogen removal; response surface models solid carbon source; simultaneous nitrification and denitrification; low-carbon wastewater; nitrogen removal; response surface models
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MDPI and ACS Style

Zhang, L.; Huang, Y.; Li, S.; He, P.; Wang, D. Optimization of Nitrogen Removal in Solid Carbon Source SND for Treatment of Low-Carbon Municipal Wastewater with RSM Method. Water 2018, 10, 827. https://doi.org/10.3390/w10070827

AMA Style

Zhang L, Huang Y, Li S, He P, Wang D. Optimization of Nitrogen Removal in Solid Carbon Source SND for Treatment of Low-Carbon Municipal Wastewater with RSM Method. Water. 2018; 10(7):827. https://doi.org/10.3390/w10070827

Chicago/Turabian Style

Zhang, Liqiu; Huang, Youwen; Li, Shugeng; He, Peifen; Wang, Dengmin. 2018. "Optimization of Nitrogen Removal in Solid Carbon Source SND for Treatment of Low-Carbon Municipal Wastewater with RSM Method" Water 10, no. 7: 827. https://doi.org/10.3390/w10070827

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