STUDY ON AMMONIA STRIPPING PROCESS OF LEACHATE FROM THE PACKED TOWERS

Authors

  • Aldre Jorge Morais Barros Universidade Federal de Campina Grande
  • Valderi Duarte Leite Universidade Estadual da Paraíba
  • Shiva Prasad Universidade Federal de Campina Grande
  • Wilton Silva Lopes Universidade Estadual da Paraíba
  • José Tavares de Sousa Universidade Estadual da Paraíba

DOI:

https://doi.org/10.4090/juee.2013.v7n2.215-222

Keywords:

leachate, ammonia, pH, packed tower, stripping

Abstract

About 245 thousand tones of municipal solid waste are collected daily in Brazil. Nearly 32 thousand tones of the collected amount are treated in sanitary landfill, which generates biogas and leachate as byproduct. The leachate resulting from sanitary landfill contains high concentration of carbonaceous and nitrogenized material. The crucial question is that the biodegradation of the carbonaceous material is difficult as long as the nitrogenized material is present in the form of ammoniacal nitrogen (NH4+), which compromises performance of biological treatment process. Therefore, a physical and chemical treatment of the leachate should be done before its biological treatment, especially for reduction of ammoniacal nitrogen concentration and for propitiating the realization of application of biological treatment. The treatment of leachate requires specific consideration, which is not needed for other types of waste. In the specific case in this study, where ammoniacal nitrogen concentration was about 2,200 mgN L-1 and the BOD5/COD ratio was 0.3, the study of ammonia stripping process was performed. Ammonia stripping process was studied in packed towers of 35 L capacity each and the parameters investigated were pH, ratio of contact area/leach volume and the aeration time. One of the parameters that influenced most in efficiency of ammonia stripping process was pH of the leachate since it contributes in conversion of ammoniacal nitrogen from NH4+ to NH3.

Downloads

Download data is not yet available.

Author Biographies

Aldre Jorge Morais Barros, Universidade Federal de Campina Grande

Unidade Acadêmica de Tecnologia do Desenvolvimento Área: Química Ambiental

Valderi Duarte Leite, Universidade Estadual da Paraíba

Departamento de Engenharia Sanitária e Ambiental Área: Resíduos Sólidos

Shiva Prasad, Universidade Federal de Campina Grande

Unidade Acadêmica de Educação Área: Química Analítica

Wilton Silva Lopes, Universidade Estadual da Paraíba

Departamento de Engenharia Sanitária e Ambiental Área: Química Ambiental

José Tavares de Sousa, Universidade Estadual da Paraíba

Departamento de Engenharia Sanitária e Ambiental Área: Tratamento de Efluentes

Downloads

Published

2013-12-08

Issue

Section

Articles