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Article

Continuous Flow-Constructed Wetlands for the Treatment of Swine Waste Water

1
USDA-ARS, U.S. Salinity Laboratory, 450 W. Big Springs Rd, Riverside, CA 92507, USA
2
Department of Animal and Veterinary Sciences, California State Polytechnic University, Pomona, CA 91768, USA
*
Author to whom correspondence should be addressed.
Int. J. Environ. Res. Public Health 2018, 15(7), 1369; https://0-doi-org.brum.beds.ac.uk/10.3390/ijerph15071369
Received: 29 May 2018 / Revised: 22 June 2018 / Accepted: 27 June 2018 / Published: 29 June 2018
(This article belongs to the Special Issue Microbiological Evaluation of Wastewater Treatment)
The microbiological quality of treated waste water is always a concern when waste water is disposed to the environment. However, when treated appropriately, such water can serve many purposes to the general population. Therefore, the treatment and removal of contaminants from swine waste water by continuous flow-constructed wetlands involves complex biological, physical, and chemical processes that may produce better quality water with reduced levels of contaminants. Swine waste contains E. coli populations and other bacterial contaminants originating from swine houses through constructed wetlands, but little is known about E. coli population in swine waste water. To assess the impacts of seasonal variations and the effect of the wetland layout/operations on water quality, E. coli isolates were compared for genetic diversity using repetitive extragenic palindromic polymerase chain reaction (REP-PCR). None of the isolates was confirmed as Shiga toxin producing E. coli O157:H7 (STEC); however, other pathotypes, such as enterotoxigenic E. coli (ETEC) were identified. Using a 90% similarity index from REP-PCR, 69 genotypes out of 421 E. coli isolates were found. Our data showed that the E. coli population was significantly (p = 0.036) higher in November than in March and August in most of the wetland cells. Furthermore, there was a significant (p = 0.001) reduction in E. coli populations from wetland influent to the final effluent. Therefore, the use of continuous flow-constructed wetlands may be a good treatment approach for reducing contaminants from different waste water sources. View Full-Text
Keywords: constructed wetland; contaminants; E. coli; REP-PCR; pollution constructed wetland; contaminants; E. coli; REP-PCR; pollution
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MDPI and ACS Style

Ibekwe, A.M.; Murinda, S.E. Continuous Flow-Constructed Wetlands for the Treatment of Swine Waste Water. Int. J. Environ. Res. Public Health 2018, 15, 1369. https://0-doi-org.brum.beds.ac.uk/10.3390/ijerph15071369

AMA Style

Ibekwe AM, Murinda SE. Continuous Flow-Constructed Wetlands for the Treatment of Swine Waste Water. International Journal of Environmental Research and Public Health. 2018; 15(7):1369. https://0-doi-org.brum.beds.ac.uk/10.3390/ijerph15071369

Chicago/Turabian Style

Ibekwe, Abasiofiok M., and Shelton E. Murinda 2018. "Continuous Flow-Constructed Wetlands for the Treatment of Swine Waste Water" International Journal of Environmental Research and Public Health 15, no. 7: 1369. https://0-doi-org.brum.beds.ac.uk/10.3390/ijerph15071369

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