Ammonia nitrogen desorption from sanitary landfill leachate in filling towers

Abstract

ABSTRACT:Sanitary landfill leachates present high concentrations of carbonaceous and nitrogenous materials. The crucial point is that carbonaceous materials are of difficult biodegradation, what compromises the performance of biological treatment processes, while nitrogenous materials, such as ammonia nitrogen, probably preclude the use of biological treatments. Therefore, the aim of this work was to study the desorption process of ammonia nitrogen from sanitary landfill leachate in filling towers. Desorption was carried out in filling towers of 35 L capacity. The leachate was collected from a sanitary landfill located in João Pessoa, Paraíba State, Brazil. Desorption efficiency for the pH values adopted in four treatments was 93% minimum and 95.5% maximum, with aeration mean time ranging from 3 to 6 hours. The limiting factors of ammonia nitrogen desorption from sanitary landfill leachates in filling towers are associated with the use of alkalizer species for pH correction, and electricity costs for aeration.

Ammoniacal Nitrogen Stripping From Landfill Leachate at Open Horizontal Flow Reactors

“…The process also dispenses electricity for the ammonia gas drag, making it relatively inexpensive when compared to other ammonia stripping processes, especially the processes performed on filling towers. The limitations of the ammonia stripping process performed in open horizontal flow reactors are directly associated with area availability and room temperature, because the HRT required for the stripping process is much longer when compared with the stripping process held in filling towers (Leite et al, 2014).…”

Characterization of leachate produced by a landfill and its influence on a sewage treatment plant

“…Because leachate contains contaminants, its production poses a significant and long-term problem and there is a need for economical treatment methods that will remain effective until the closure of the landfill (Aziz et al, 2012;Leite, Barros, Lopes, & Sousa, 2014).…”

“…Because leachate contains contaminants, its production poses a significant and long‐term problem and there is a need for economical treatment methods that will remain effective until the closure of the landfill (Aziz et al., 2012; Leite, Barros, Lopes, & Sousa, 2014). According to Sadeghi, Fadaei, Tadrisi, Bay, and Naghizadeh (2018), leachates are rarely treated in classical and conventional wastewater treatment plants, suggesting electrocoagulation as an alternative treatment process with high efficiency for the removal of organic matter, nitrate, phosphorous, and turbidity in sewage treatment.…”