Study of Evolution of Microbiological Properties in Sewage Sludge-Amended Soils: A Pilot Experience
| Autor: | Andrea M. Lopez, María P. Ormad, Judith Sarasa, Natividad Miguel, Jairo Gómez, Rosa Mosteo |
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| Rok vydání: | 2020 |
| Předmět: |
010504 meteorology & atmospheric sciences
Health Toxicology and Mutagenesis Microorganism Amendment lcsh:Medicine clayey soil 010501 environmental sciences engineering.material complex mixtures 01 natural sciences Article Soil Metals Heavy Soil Pollutants sandy soil Fertilizers 0105 earth and related environmental sciences Sewage sewage sludge lcsh:R Public Health Environmental and Occupational Health food and beverages Agriculture microbiological pollution pathogenic bacteria Soil type Pulp and paper industry soil properties Soil water engineering Environmental science Sewage treatment Water treatment Fertilizer Sludge |
| Zdroj: | International Journal of Environmental Research and Public Health, Vol 17, Iss 6696, p 6696 (2020) Zaguán. Repositorio Digital de la Universidad de Zaragoza instname Zaguán: Repositorio Digital de la Universidad de Zaragoza Universidad de Zaragoza International Journal of Environmental Research and Public Health Volume 17 Issue 18 |
| ISSN: | 1660-4601 |
| DOI: | 10.3390/ijerph17186696 |
| Popis: | Large amounts of sewage sludge are generated in urban wastewater treatment plants and used as fertilizer in agriculture due to its characteristics. They can contain contaminants such as heavy metals and pathogenic microorganisms. The objective of this research work is to study, in real conditions, the evolution of microbial concentration in agricultural soils fertilized by biologically treated sewage sludge. The sludge (6.25 tons Ha&minus 1) was applied in two agricultural soils with different textures and crops. A microbiological (total coliforms, Escherichia coli, Staphylococcus aureus, Enterococcus sp., Pseudomonas sp., Salmonella sp. and total mesophylls) and physical-chemical characterization of the sludge, soils and irrigation water were carried out. The evolution of these parameters during sowing, growth and harvesting of crops was studied. Initially, sewage sludge had a higher concentration of microorganisms than soils. Irrigation water also contained microorganisms, fewer than sewage sludge amendment but not negligible. After amendment, there were no differences in the microbiological evolution in the two types of soil. In general, bacterial concentrations after crop harvest were lower than bacterial concentrations detected before sewage sludge amendment. Consequently, the application of sludge from water treatment processes did not worsen the microbiological quality of agricultural soil in this study at real conditions. |
| Databáze: | OpenAIRE |
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