Monitoring biofilm function in new and matured full-scale slow sand filters using flow cytometric histogram image comparison (CHIC)

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Chan, SandyLund University,Lunds universitet,Teknisk mikrobiologi,Centrum för tillämpade biovetenskaper,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Applied Microbiology,Center for Applied Life Sciences,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH,Sydvatten AB,Sweden Water Research AB (author)

Monitoring biofilm function in new and matured full-scale slow sand filters using flow cytometric histogram image comparison (CHIC)

Article/chapterEnglish2018

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Elsevier BV,2018
10 s.

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LIBRIS-ID:oai:lup.lub.lu.se:075b8974-20f8-42e5-a3e0-28b164419c92
https://lup.lub.lu.se/record/075b8974-20f8-42e5-a3e0-28b164419c92URI
https://doi.org/10.1016/j.watres.2018.03.032DOI

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Language:English
Summary in:English

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Subject category:art swepub-publicationtype
Subject category:ref swepub-contenttype

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While slow sand filters (SSFs) have produced drinking water for more than a hundred years, understanding of their associated microbial communities is limited. In this study, bacteria in influent and effluent water from full-scale SSFs were explored using flow cytometry (FCM) with cytometric histogram image comparison (CHIC) analysis; and routine microbial counts for heterotrophs, total coliforms and Escherichia coli. To assess if FCM can monitor biofilm function, SSFs differing in age and sand composition were compared. FCM profiles from two established filters were indistinguishable. To examine biofilm in the deep sand bed, SSFs were monitored during a scraping event, when the top layer of sand and the schmutzdecke are removed to restore flow through the filter. The performance of an established SSF was stable: total organic carbon (TOC), pH, numbers of heterotrophs, coliforms, E. coli, and FCM bacterial profile were unaffected by scraping. However, the performance of two newly-built SSFs containing new and mixed sand was compromised: breakthrough of both microbial indicators and TOC occurred following scraping. The compromised performance of the new SSFs was reflected in distinct effluent bacterial communities; and, the presence of microbial indicators correlated to influent bacterial communities. This demonstrated that FCM can monitor SSF performance. Removal of the top layer of sand did not alter the effluent water from the established SSF, but did affect that of the SSFs containing new sand. This suggests that the impact of the surface biofilm on effluent water is greater when the deep sand bed biofilm is not established.

Subject headings and genre

TEKNIK OCH TEKNOLOGIER Miljöbioteknik Vattenbehandling hsv//swe
ENGINEERING AND TECHNOLOGY Environmental Biotechnology Water Treatment hsv//eng
Biofilm
Cytometric histogram image comparison (CHIC)
Drinking water
Flow cytometry
Schmutzdecke
Slow sand filters

Added entries (persons, corporate bodies, meetings, titles ...)

Pullerits, KristjanLund University,Lunds universitet,Teknisk mikrobiologi,Centrum för tillämpade biovetenskaper,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Applied Microbiology,Center for Applied Life Sciences,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH,Sweden Water Research AB,Sydvatten AB(Swepub:lu)kr4754pu (author)
Riechelmann, JanineLund University,Lunds universitet,Teknisk mikrobiologi,Centrum för tillämpade biovetenskaper,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Applied Microbiology,Center for Applied Life Sciences,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)ja1653ri (author)
Persson, Kenneth M.Lund University,Lunds universitet,Avdelningen för Teknisk vattenresurslära,Institutionen för bygg- och miljöteknologi,Institutioner vid LTH,Lunds Tekniska Högskola,Division of Water Resources Engineering,Department of Building and Environmental Technology,Departments at LTH,Faculty of Engineering, LTH,Sydvatten AB,Sweden Water Research AB(Swepub:lu)tvrl-kpe (author)
Rådström, PeterLund University,Lunds universitet,Teknisk mikrobiologi,Centrum för tillämpade biovetenskaper,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Applied Microbiology,Center for Applied Life Sciences,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)tmb-pra (author)
Paul, Catherine J.Lund University,Lunds universitet,Avdelningen för Teknisk vattenresurslära,Institutionen för bygg- och miljöteknologi,Institutioner vid LTH,Lunds Tekniska Högskola,Teknisk mikrobiologi,Centrum för tillämpade biovetenskaper,Kemiska institutionen,Division of Water Resources Engineering,Department of Building and Environmental Technology,Departments at LTH,Faculty of Engineering, LTH,Applied Microbiology,Center for Applied Life Sciences,Department of Chemistry,Faculty of Engineering, LTH(Swepub:lu)tmb-cpa (author)
Teknisk mikrobiologiCentrum för tillämpade biovetenskaper (creator_code:org_t)

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In:Water Research: Elsevier BV138, s. 27-360043-1354

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