Evaluation of the water purification system consisting of bio-sand filters and titanium dioxide

Authors

  • Gema Rivas Facultad de Ingeniería Química, Universidad Nacional de Ingeniería (UNI) Avenida Universitaria, PO Box 5595, Managua
  • Eddysson Flores Facultad de Ingeniería Química, Universidad Nacional de Ingeniería (UNI)Avenida Universitaria, PO Box 5595, Managua
  • Javier Ramírez Facultad de Ingeniería Química, Universidad Nacional de Ingeniería (UNI)Avenida Universitaria, PO Box 5595, Managua,

DOI:

https://doi.org/10.5377/nexo.v27i2.1941

Keywords:

Groundwater, Arsenic, Filtration, Absorption

Abstract

A batch treatment system (TS) consisting of a biosand filter (BSF) and a filter system packed with titanium dioxide (FSTD) for purifying drinking water was evaluated during 121 days, through the development of the biofilm, TS monitoring, determining the quality of the raw and filtered water, removal efficiencies of BSF and FSTD, and monitoring of arsenic within the effluent TS. The development of the biofilm on the sand surface of the BSF required 31 days and it worked stable in removing turbidity when the raw water varied < 1 up to 31 NTU and decreasing the pH between 7.6-8.3. The quality of the raw water of "La Corona" suggested that only manganese (1.9 mg/L Mn) did not fulfill with the NTON 05 007-98, while only the conductivity (502 μS/cm) and the calcium hardness (53.91 mg/L CaCO3) exceeded CAPRE regulations for the filtered water. The top removal efficiencies of the BSF were 99.9%; 98.46%; 91.76% and 62.16% corresponding to E. coli, turbidity, total iron and ammonium, respectively. Meanwhile, the top removal efficiencies of the FSTD were 30% for manganese and 99.9% for arsenic, removing 40-60 μg/L As of the raw water up to < 10 μg/L As.

DOI: http://dx.doi.org/10.5377/nexo.v27i2.1941

Downloads

Download data is not yet available.
Abstract
1521
PDF (Español (España)) 1579

Downloads

Published

2014-12-30

How to Cite

Rivas, G., Flores, E., & Ramírez, J. (2014). Evaluation of the water purification system consisting of bio-sand filters and titanium dioxide. Nexo Scientific Journal, 27(2), 61–73. https://doi.org/10.5377/nexo.v27i2.1941

Issue

Vol. 27 No. 2 (2014)

Section

Articles

License

The authors who publish in Nexo Scientific Journal agree to the following terms:

  • Authors retain the copyright and grant the journal the right of the first publication under the license Creative Commons Attribution License, which allows others to share the work with a recognition of the authorship of the work and the initial publication in Nexo Scientific Journal.
  • Authors may separately establish additional agreements for the non-exclusive distribution of the version of the work published in the journal (for example, in an institutional repository or a book), with the recognition of the initial publication in Nexo Scientific Journal.
  • Authors are allowed and encouraged to disseminate their works electronically (for example, in institutional repositories or in their own website) before and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published works.