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Heavy metal residues in soil and crops from applications of anaerobically digested sludge



Heavy metal residues in soil and crops from applications of anaerobically digested sludge



Journal Water Pollution Control Federation 61(11-12): 1673-1677



Studies have shown that liquid digested sludge can be used as a soil amendment to provide low-cost fertilizer and to improve soil tilth. Dried digested sewage sludge was mixed with soil in test plots at application rates of 75 tonnes sludge/ha (two plots) and 150 tonnes sludge/ha (two plots). Oat and oat/alfalfa mixtures were grown on each plot. The plots were irrigated with decant water from the sludge drying beds. Chemical, physical, and bacteriological tests were performed on the dried sludge, the soils, the decant water from the sludge drying beds, and the organic material from each plot. After 1 year of testing, no harmful concentrations of chemical or bacterial constituents were observed in the soil or in the plant material and the physical properties of the sludge-amended soils were improved.

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Accession: 001850260

Download citation: RISBibTeXText

DOI: 10.2307/41480389



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