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Article

Comparative Study on Advanced Nitrogen Removal of Landfill Leachate Treated by SBR and SBBR

1
School of Municipal and Environmental Engineering, Shandong Jianzhu University, 1000 Fengming Street, Jinan 250101, China
2
Shandong Guochen Industrial Group Co., Ltd., Wangui Road, Jinan 250305, China
*
Author to whom correspondence should be addressed.
Academic Editors: Carmen Teodosiu and Antonio Panico
Water 2021, 13(22), 3240; https://doi.org/10.3390/w13223240
Received: 14 October 2021 / Revised: 12 November 2021 / Accepted: 12 November 2021 / Published: 16 November 2021
In order to achieve advanced nitrogen removal from landfill leachate without the addition of external carbon sources, a Sequencing Batch Reactor (SBR) and a Sequencing Biofilm Batch Reactor (SBBR) were proposed for the treatment of actual landfill leachate with ammonia nitrogen (NH4+-N) and chemical oxygen demand (COD) concentrations of 1000 ± 100 mg/L and 4000 ± 100 mg/L, respectively. The operating modes of both systems are anaerobic–aerobic–anoxic. After 110 days of start-up and biomass acclimation, the effluent COD and the total nitrogen (TN) of the two systems were 650 ± 50 mg/L and 20 ± 10 mg/L, respectively. The removal rates of COD and total nitrogen could reach around 85% and above 95%, respectively. Therefore, advanced nitrogen removal was implemented in landfill leachate without adding any carbon sources. After the two systems were acclimated, nitrogen removing cycles of SBR and SBBR were 24 h and 20 h, respectively. The nitrogen removing efficiency of SBBR was improved by 16.7% in comparison to SBR. In the typical cycle of the two groups of reactors, the nitrification time of the system was the same, which was 5.5 h, indicating that although the fiber filler occupied part of the reactor space, it had no significant impact on the nitrification performance of the system. At the end of aeration, the internal carbon source content of sludge of SBBR was equivalent to that of the SBR system. However, the total nitrogen concentration of SBBR was only 129 mg/L, which is 33.8% lower than that of SBR at 195 mg/L. The main reason was that biofilm enhanced the simultaneous nitrification and denitrification (SND) effect of the system. View Full-Text
Keywords: landfill leachate; SBR; SBBR; advanced nitrogen removal; simultaneous nitrification and denitrification landfill leachate; SBR; SBBR; advanced nitrogen removal; simultaneous nitrification and denitrification
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MDPI and ACS Style

Jiang, J.; Ma, L.; Hao, L.; Wu, D.; Wang, K. Comparative Study on Advanced Nitrogen Removal of Landfill Leachate Treated by SBR and SBBR. Water 2021, 13, 3240. https://doi.org/10.3390/w13223240

AMA Style

Jiang J, Ma L, Hao L, Wu D, Wang K. Comparative Study on Advanced Nitrogen Removal of Landfill Leachate Treated by SBR and SBBR. Water. 2021; 13(22):3240. https://doi.org/10.3390/w13223240

Chicago/Turabian Style

Jiang, Jinfeng, Liang Ma, Lianjie Hao, Daoji Wu, and Kai Wang. 2021. "Comparative Study on Advanced Nitrogen Removal of Landfill Leachate Treated by SBR and SBBR" Water 13, no. 22: 3240. https://doi.org/10.3390/w13223240

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