Fate of faecal coliform bacteria in a waste water retention reservoir containing Lemna gibba L.

Dewedar, Ahmed; Bahgat, M.

doi:10.1016/0043-1354(95)00036-k

Cited by 19 publications

(10 citation statements)

References 7 publications

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“…In contrast to our study, the survival of fecal coliform in a wastewater retention reservoir containing Lemna gibba remained constant for 5 days (Dewedar 1995).…”

Section: Comparison Of Results With Field Studiescontrasting

confidence: 46%

The effect of wetland vegetation on the survival of Escherichia coli, Salmonella typhimurium, bacteriophage MS-2 and polio virus

Karim

Glenn

Gerba

2008

Journal of Water and Health

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A study was conducted to examine the role of aquatic plants used in constructed wetlands on the survival of enteric bacteria and viruses. Four small-scale wetland systems, receiving fresh water and two other wetland systems, receiving secondary unchlorinated sewage were used in this study. Fresh water and secondary sewage without the presence of any aquatic plants were used as controls. Escherichia coli, Salmonella typhimurium, bacteriophage MS-2 and poliovirus were added to the waters collected from the wetlands and controls. The presence of aquatic plants significantly increased the die-off of both bacteria in fresh water and secondary sewage.No significant difference in the die-off of E. coli and S. typhimurium was observed in water from wetlands with different types of plants in freshwater. However, there was a significant difference in the die-off of E. coli in water with aquatic plants when sewage was used. The presence of the plants significantly increased the inactivation of MS-2 and poliovirus. Additional work on the survival of E. coli indicated that the plausible mechanism of bacterial die-off in constructed wetlands is through increased microbial competition or predation.

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“…In contrast to our study, the survival of fecal coliform in a wastewater retention reservoir containing Lemna gibba remained constant for 5 days (Dewedar 1995).…”

Section: Comparison Of Results With Field Studiescontrasting

confidence: 46%

The effect of wetland vegetation on the survival of Escherichia coli, Salmonella typhimurium, bacteriophage MS-2 and polio virus

Karim

Glenn

Gerba

2008

Journal of Water and Health

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“…However, probably more important is that the duckweed cover protects the faecal coliform from solar radiation. Dewedar and Bahgat (1995) reported that no decline in the counts was recorded in case of faecal coliform present in a set of dialysis sacs suspended under duckweed mat, whereas faecal coliform in dialysis sacs exposed to sun showed a decline. The faecal coliform decay in the dark parts of stabilisation ponds under conditions of carbon and nutrients sufficiency was expected to be negligible ( Van der Steen et al, 2000).…”

Section: Efficiency Of the Treatment Systemmentioning

confidence: 92%

Nitrogen recovery in an integrated system for wastewater treatment and tilapia production

et al. 2007

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An integrated system, consisting of Up-flow Anaerobic Sludge Blanket (UASB)-duckweed-tilapia ponds was used for recovery of sewage nutrients and water recycling. A UASB reactor with 40 liter working volume was used as pre-treatment unit followed by a series of three duckweed ponds for nitrogen recovery. The treated effluent and duckweed biomass was used to feed fishponds stocked with Nile tilapia (Oreochromis niloticus). The UASB reactor was fed with raw, domestic sewage at 6 h hydraulic retention time. The three duckweed ponds were stocked with Lemna gibba and fed with UASB effluent at 15 days hydraulic retention time. Nitrogen recovery from UASB effluent via duckweed biomass represented 81% of total nitrogen removal and 46.5% from the total nitrogen input to the system. In subsequent fishponds the nitrogen recovery from duckweed as fish feed was in the range of 13.4-20%. This nitrogen in fish biomass represented 10.6-11.5 g N from the total nitrogen in the raw sewage fed to the UASB reactor. The growth performance of tilapia (Oreochromis niloticus) showed specific growth rates (SGR) in the range of 0.53-0.97. The range of feed conversion ratio (FCR) and protein efficiency ratio (PER) were 1.2-2.2 and 2.1-2.28, respectively. The results of the experiments showed total fish yield and net fish yield in the range of 17-22.8 ton/ha/y and 11.8-15.7 ton/ha/y respectively. In conclusion UASB-duckweed-tilapia ponds provide marketable by-products in the form of duckweed and fish protein, which represent a cost recovery for sewage treatment.

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“…Haramoto et al (2006) examined seasonal quality of tertiarytreated effluent leaving a water treatment plant in Tokyo, Japan, and reported higher concentrations of human norovirus in winter, coinciding with the epidemic season in that country. Hot spots in reservoirs and impoundments could be related to aquatic plant and algal growth (Cinotto, 2005;Dewedar and Bahgat, 1995). Presence of the hot spots in streams sometimes can be associated with point sources of pollution.…”

Section: Temporal and Spatial Variabilitiesmentioning

confidence: 99%

“…Both ameba and algae have been shown to enhance the survival of Campylobacter, a waterborne pathogen that otherwise has a very fast die-off (Axelsson-Olsson et al, 2010). The water source ecosystem controls the level of nutrients and the degree of water transparency, and can prevent sunlight that causes inactivation (Dewedar and Bahgat, 1995). The water source ecosystem controls the level of nutrients and the degree of water transparency, and can prevent sunlight that causes inactivation (Dewedar and Bahgat, 1995).…”

Section: Survival Of Pathogen and Indicator Organisms In Waters Suitamentioning

confidence: 99%

“…Cinotto (2005) studied an impoundment area in a Pennsylvania creek and observed that elevated aquatic growth resulted in sharp increases in E. coli concentrations from upstream to downstream throughout the impoundment area for 2 years in a row. Algae can enhance survival of microorganisms in surface and subsurface water sources in various ways, including the release of carbon substrates (Carr et al, 2005), protection from direct and indirect sunlight (Dewedar and Bahgat, 1995), and attachment to plant surfaces (Karim et al, 2004). Field data of these authors showed a significant linear relation between fecal coliform concentrations and periphyton ash-free dry weight.…”

Section: Aquatic Biotamentioning

confidence: 99%

See 1 more Smart Citation

Irrigation Waters as a Source of Pathogenic Microorganisms in Produce: A Review

Pachepsky

Shelton

McLain

et al. 2011

Advances in Agronomy

160

169

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Fate of faecal coliform bacteria in a waste water retention reservoir containing Lemna gibba L.

Cited by 19 publications

References 7 publications

The effect of wetland vegetation on the survival of Escherichia coli, Salmonella typhimurium, bacteriophage MS-2 and polio virus

The effect of wetland vegetation on the survival of Escherichia coli, Salmonella typhimurium, bacteriophage MS-2 and polio virus

Nitrogen recovery in an integrated system for wastewater treatment and tilapia production

Irrigation Waters as a Source of Pathogenic Microorganisms in Produce: A Review

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