ORIGINAL RESEARCH
Landfill Leachate Treatment Using a Combination
of Heterotrophic Denitrification and Partial
Nitritation in a Single Sequencing
Batch Reactor
| 1 | School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, China |
| 2 | College of Environment and Energy, South China University of Technology,
Guangzhou Higher Education Mega Center, China |
| 3 | Guizhou Academy of Sciences, Guiyang, China |
| 4 | State Key Laboratory of Subtropical Building Sciences, South China University of Technology, Guangzhou, China |
| 5 | Institute of Environmental Studies at Greater Bay, Key Laboratory for Water Quality and Conservation
of the Pearl River Delta, Ministry of Education, School of Environmental Science and Engineering,
Guangzhou University, Guangzhou, China |
Submission date: 2018-10-08
Final revision date: 2018-12-15
Acceptance date: 2018-12-15
Online publication date: 2019-08-09
Publication date: 2019-10-23
Pol. J. Environ. Stud. 2020;29(1):397–408
KEYWORDS
TOPICS
ABSTRACT
The combination of heterotrophic denitrification and partial nitritation for the treatment of
landfill leachate was investigated in a single sequencing batch reactor with the objective of achieving
simultaneous elimination of nitrogen and organic matter and providing a suitable effluent for the
subsequent anaerobic ammonium oxidation (Anammox) treatment. Partial nitritation was established by
finely adjusting the airflow rate (AFR) and the influent loading rate (ILR) to an oxygen-limiting condition.
The long-term operation of the batch reactor showed that more than 55% removal of the chemical oxygen
demand (COD) and 60% elimination of total nitrogen (TN) were obtained. Cycle analysis showed that
heterotrophic denitrification contributed to approximately 28% reduction of nitrogen and 24% reduction
of COD in the bulk liquid. This study showed that the treatment capacity increased with the increasing
total air flux (TAF), and that nitrate formation could be inhibited by controlling the ratio of TAF to
ILR below 240 (m3 air m-3/kg COD). It was also determined that the effluent pH was an indicator of the
partial nitritation performance. This study provides important insights into the process control on partial
nitritation of landfill leachate with fluctuated influent conditions.
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