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

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 (<inline-formula&g...

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Autores principales:	Jinfeng Jiang, Liang Ma, Lianjie Hao, Daoji Wu, Kai Wang
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	landfill leachate SBR SBBR advanced nitrogen removal simultaneous nitrification and denitrification Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500
Acceso en línea:	https://doaj.org/article/24168f886aaf4b0793f05dc25c80fae8
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spelling	oai:doaj.org-article:24168f886aaf4b0793f05dc25c80fae82021-11-25T19:15:53ZComparative Study on Advanced Nitrogen Removal of Landfill Leachate Treated by SBR and SBBR10.3390/w132232402073-4441https://doaj.org/article/24168f886aaf4b0793f05dc25c80fae82021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4441/13/22/3240https://doaj.org/toc/2073-4441In 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 (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msubsup><mrow><mi mathvariant="normal">N</mi><mi mathvariant="normal">H</mi></mrow><mn>4</mn><mo>+</mo></msubsup></semantics></math></inline-formula>-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.Jinfeng JiangLiang MaLianjie HaoDaoji WuKai WangMDPI AGarticlelandfill leachateSBRSBBRadvanced nitrogen removalsimultaneous nitrification and denitrificationHydraulic engineeringTC1-978Water supply for domestic and industrial purposesTD201-500ENWater, Vol 13, Iss 3240, p 3240 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	landfill leachate SBR SBBR advanced nitrogen removal simultaneous nitrification and denitrification Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500
spellingShingle	landfill leachate SBR SBBR advanced nitrogen removal simultaneous nitrification and denitrification Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500 Jinfeng Jiang Liang Ma Lianjie Hao Daoji Wu Kai Wang Comparative Study on Advanced Nitrogen Removal of Landfill Leachate Treated by SBR and SBBR
description	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 (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msubsup><mrow><mi mathvariant="normal">N</mi><mi mathvariant="normal">H</mi></mrow><mn>4</mn><mo>+</mo></msubsup></semantics></math></inline-formula>-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.
format	article
author	Jinfeng Jiang Liang Ma Lianjie Hao Daoji Wu Kai Wang
author_facet	Jinfeng Jiang Liang Ma Lianjie Hao Daoji Wu Kai Wang
author_sort	Jinfeng Jiang
title	Comparative Study on Advanced Nitrogen Removal of Landfill Leachate Treated by SBR and SBBR
title_short	Comparative Study on Advanced Nitrogen Removal of Landfill Leachate Treated by SBR and SBBR
title_full	Comparative Study on Advanced Nitrogen Removal of Landfill Leachate Treated by SBR and SBBR
title_fullStr	Comparative Study on Advanced Nitrogen Removal of Landfill Leachate Treated by SBR and SBBR
title_full_unstemmed	Comparative Study on Advanced Nitrogen Removal of Landfill Leachate Treated by SBR and SBBR
title_sort	comparative study on advanced nitrogen removal of landfill leachate treated by sbr and sbbr
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/24168f886aaf4b0793f05dc25c80fae8
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_version_	1718410078899404800

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

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