Removal of natural organic matter by an end-free gravity-driven membrane system combined with powdered activated carbon for household water supply

Jonghun Lee, Jong Chan Yi, Hyejin Jung, Pyung Kyu Park, Soo Hong Noh

Research output: Contribution to journalArticle

Abstract

There is a considerable need for household water treatment (HWT) systems that can supply safe and affordable drinking water for low-and middle-income countries. One HWT system, an end-free gravity-driven membrane (GDM) system, has been developed to produce potable water. GDM systems can remove turbid material and pathogens but cannot reduce natural organic matter (NOM) effectively. Because chlorination has been widely used for HWT in low-and middle-income countries, there are chances of trihalomethane (THM) formation with NOM content in water. To reduce NOM, an end-free GDM system combined with powdered activated carbon (PAC) was adopted. The raw water used was groundwater and lake water spiked with a humic acid solution. For raw water with low NOM concentration, batch operation without PAC addition was preferable to prevent a significant decrease in permeability because of PAC cake layer formation. For high NOM concentrations, PAC addition was required to reduce dissolved organic carbon (DOC) concentrations and to keep total THM formation under acceptable levels, the concentration of which was theoretically calculated. In this case, to prevent permeability and pH decreases from PAC addition, sufficient PAC should be added into the raw water to maintain the PAC concentration as low as possible while still satisfying DOC removal requirements. The end-free GDM system combined with PAC would have significant potential for HWT in low-and middle-income countries.

Original languageEnglish
Pages (from-to)311-321
Number of pages11
JournalDesalination and Water Treatment
Volume144
DOIs
Publication statusPublished - 2019 Mar

Fingerprint

Water supply
Activated carbon
Biological materials
activated carbon
Gravitation
water supply
gravity
membrane
Membranes
organic matter
Water treatment
water treatment
income
Water
Organic carbon
Potable water
dissolved organic carbon
drinking water
permeability
removal

All Science Journal Classification (ASJC) codes

  • Water Science and Technology
  • Ocean Engineering
  • Pollution

Cite this

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title = "Removal of natural organic matter by an end-free gravity-driven membrane system combined with powdered activated carbon for household water supply",
abstract = "There is a considerable need for household water treatment (HWT) systems that can supply safe and affordable drinking water for low-and middle-income countries. One HWT system, an end-free gravity-driven membrane (GDM) system, has been developed to produce potable water. GDM systems can remove turbid material and pathogens but cannot reduce natural organic matter (NOM) effectively. Because chlorination has been widely used for HWT in low-and middle-income countries, there are chances of trihalomethane (THM) formation with NOM content in water. To reduce NOM, an end-free GDM system combined with powdered activated carbon (PAC) was adopted. The raw water used was groundwater and lake water spiked with a humic acid solution. For raw water with low NOM concentration, batch operation without PAC addition was preferable to prevent a significant decrease in permeability because of PAC cake layer formation. For high NOM concentrations, PAC addition was required to reduce dissolved organic carbon (DOC) concentrations and to keep total THM formation under acceptable levels, the concentration of which was theoretically calculated. In this case, to prevent permeability and pH decreases from PAC addition, sufficient PAC should be added into the raw water to maintain the PAC concentration as low as possible while still satisfying DOC removal requirements. The end-free GDM system combined with PAC would have significant potential for HWT in low-and middle-income countries.",
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Removal of natural organic matter by an end-free gravity-driven membrane system combined with powdered activated carbon for household water supply. / Lee, Jonghun; Yi, Jong Chan; Jung, Hyejin; Park, Pyung Kyu; Noh, Soo Hong.

In: Desalination and Water Treatment, Vol. 144, 03.2019, p. 311-321.

Research output: Contribution to journalArticle

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