Disinfection of synthetic and real municipal wastewater effluent by flow-through pulsed UV-light treatment system

Gulsad Uslu, Ali Demirci, John Ragan

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

This study was undertaken to characterize the efficacy of flow-through pulsed UV light for inactivation of Escherichia coli and Bacillus subtilis spores in synthetic (SMWE) and real municipal wastewater effluent (RMWE). The results show that complete inactivation was observed with a 10 L/min flow rate for E. coli and 6 L/min flow rate for B. subtilis using one-pass pulsed UV treatment and SMWE. For two-pass treatment, complete inactivation was observed in SMWE with a 16 L/min flow rate for E. coli and 10 L/min flow rate for B. subtilis. On the other hand, complete inactivation was observed with 10 L/min flow rate treatments for E. coli in RMWE, whereas 4.15 Log reduction was observed at 6 L/min for B. subtilis in RMWE for one pass. The raw wastewater was also treated under flow-through pulsed UV light at 10 L/min flow rate and complete inactivation was observed. The treatment resulted in significant chemical oxygen demand (COD) and total organic carbon (TOC) reductions. These results clearly indicate that pulsed UV not only successfully disinfects the wastewater effluent, but also reduces the organic load of municipal wastewater effluent. Therefore, pulsed UV technology can be an alternative for chlorine and conventional UV light for municipal wastewater effluent.

Original languageEnglish (US)
Pages (from-to)89-97
Number of pages9
JournalJournal of Water Process Engineering
Volume10
DOIs
StatePublished - Apr 1 2016

Fingerprint

Disinfection
Ultraviolet Rays
Waste Water
Ultraviolet radiation
disinfection
Effluents
Wastewater
effluent
wastewater
Flow rate
Bacillus subtilis
Escherichia coli
Biological Oxygen Demand Analysis
Chlorine
Chemical oxygen demand
Bacilli
Organic carbon
Spores
chemical oxygen demand
total organic carbon

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Safety, Risk, Reliability and Quality
  • Waste Management and Disposal
  • Process Chemistry and Technology

Cite this

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title = "Disinfection of synthetic and real municipal wastewater effluent by flow-through pulsed UV-light treatment system",
abstract = "This study was undertaken to characterize the efficacy of flow-through pulsed UV light for inactivation of Escherichia coli and Bacillus subtilis spores in synthetic (SMWE) and real municipal wastewater effluent (RMWE). The results show that complete inactivation was observed with a 10 L/min flow rate for E. coli and 6 L/min flow rate for B. subtilis using one-pass pulsed UV treatment and SMWE. For two-pass treatment, complete inactivation was observed in SMWE with a 16 L/min flow rate for E. coli and 10 L/min flow rate for B. subtilis. On the other hand, complete inactivation was observed with 10 L/min flow rate treatments for E. coli in RMWE, whereas 4.15 Log reduction was observed at 6 L/min for B. subtilis in RMWE for one pass. The raw wastewater was also treated under flow-through pulsed UV light at 10 L/min flow rate and complete inactivation was observed. The treatment resulted in significant chemical oxygen demand (COD) and total organic carbon (TOC) reductions. These results clearly indicate that pulsed UV not only successfully disinfects the wastewater effluent, but also reduces the organic load of municipal wastewater effluent. Therefore, pulsed UV technology can be an alternative for chlorine and conventional UV light for municipal wastewater effluent.",
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AB - This study was undertaken to characterize the efficacy of flow-through pulsed UV light for inactivation of Escherichia coli and Bacillus subtilis spores in synthetic (SMWE) and real municipal wastewater effluent (RMWE). The results show that complete inactivation was observed with a 10 L/min flow rate for E. coli and 6 L/min flow rate for B. subtilis using one-pass pulsed UV treatment and SMWE. For two-pass treatment, complete inactivation was observed in SMWE with a 16 L/min flow rate for E. coli and 10 L/min flow rate for B. subtilis. On the other hand, complete inactivation was observed with 10 L/min flow rate treatments for E. coli in RMWE, whereas 4.15 Log reduction was observed at 6 L/min for B. subtilis in RMWE for one pass. The raw wastewater was also treated under flow-through pulsed UV light at 10 L/min flow rate and complete inactivation was observed. The treatment resulted in significant chemical oxygen demand (COD) and total organic carbon (TOC) reductions. These results clearly indicate that pulsed UV not only successfully disinfects the wastewater effluent, but also reduces the organic load of municipal wastewater effluent. Therefore, pulsed UV technology can be an alternative for chlorine and conventional UV light for municipal wastewater effluent.

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