Evaluation of food processing wastewater loading characteristics on metal mobilization within the soil

Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
Ryan Julien, Steven I Safferman

Abstract

Wastewater generated during food processing is commonly treated using land-application systems which primarily rely on soil microbes to transform nutrients and organic compounds into benign byproducts. Naturally occurring metals in the soil may be chemically reduced via microbially mediated oxidation-reduction reactions as oxygen becomes depleted. Some metals such as manganese and iron become water soluble when chemically reduced, leading to groundwater contamination. Alternatively, metals within the wastewater may not become assimilated into the soil and leach into the groundwater if the environment is not sufficiently oxidizing. A lab-scale column study was conducted to investigate the impacts of wastewater loading values on metal mobilization within the soil. Oxygen content and volumetric water data were collected via soil sensors for the duration of the study. The pH, chemical oxygen demand, manganese, and iron concentrations in the influent and effluent water from each column were measured. Average organic loading and organic loading per dose were shown to have statistically significant impacts using Spearman's Rank Correlation Coefficient on effluent water quality. The Hydraulic resting period qualitatively appeared to ha...Continue Reading

References

Jun 8, 2002·Ecotoxicology and Environmental Safety·A Dennis Lemly, Harry M Ohlendorf
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Jun 13, 2008·Environmental Toxicology and Chemistry·Ludmilla Aristilde, Garrison Sposito

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Citations

Mar 2, 2019·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Younsuk DongA Pouyan Nejadhashemi
Aug 26, 2018·Environmental Science and Pollution Research International·Gang LiYan Zhang

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