Household slow sand filters in intermittent and continuous flows to treat water containing low mineral ion concentrations and Bisphenol A

Lyda Patricia Sabogal-Paz, Luiza C. Campos, Anna Bogush, Melisa Canales

Research output: Contribution to journalArticle

Abstract

Household slow sand filter (HSSF) has been used as an alternative to drinking water treatment in rural communities worldwide; however, its performance to treat influent water with quality similar to rainwater still needs further studies. Rainwater presents low pH and slight mineral ion concentrations, an aspect that can modify the filter media and consequently the HSSF efficiency. Furthermore, house roofs used in rainwater harvesting can be made of plastic. Therefore, it can introduce chemicals such as Bisphenol A (BPA) in the water. In this context, two pilot-scale HSSFs operated in continuous and intermittent flows were evaluated to treat water containing BPA and low mineral ion concentrations in order to assess the filter performance. Filter media leaching was noticed in the trials; thus, filter media and construction material selection must be carefully evaluated to eliminate risks of pollutant occurrence in drinking water. Operational differences between continuous and intermittent flows influenced the HSSF efficiency for BPA and DOC removals; even so, the filters’ performance was low probably due to the slow schmutzdecke development. According to tracer test results, HSSF can be classified as a plug flow reactor and strategies to improve its hydraulic performance are not required.
Original languageEnglish
Article number135078
JournalScience of the Total Environment
Volume702
Early online date1 Nov 2019
DOIs
Publication statusE-pub ahead of print - 1 Nov 2019

Fingerprint

Minerals
Sand
Ions
filter
sand
ion
Water
mineral
Potable water
Drinking Water
rainwater
water
Water treatment
Roofs
Leaching
Hydraulics
Plastics
bisphenol A
household
roof

Keywords

  • Biosand filter
  • Decentralised treatment
  • Drinking water
  • Endocrine disruptor
  • Rainwater

Cite this

Household slow sand filters in intermittent and continuous flows to treat water containing low mineral ion concentrations and Bisphenol A. / Sabogal-Paz, Lyda Patricia ; Campos, Luiza C.; Bogush, Anna; Canales, Melisa.

In: Science of the Total Environment, Vol. 702, 135078, 01.02.2020.

Research output: Contribution to journalArticle

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