Obtaining edaphic biostimulants/biofertilizers from different sewage sludges. Effects on soil biological properties

Environmental Technology
Bruno Rodríguez-MorgadoManuel Tejada

Abstract

We studied the influence of six edaphic biostimulants/biofertilizers (BSs) manufactured by the pH-stat method from different sewage sludge (SS): SS1 (an anaerobic mature sludge, one year old), SS2 (an aerobic young sludge, without maturation) and SS3 (an aerobic mature sludge, four months old), not previously autoclaved (A) and autoclaved (B), by analysing their effects on soil biological properties. Soil enzymatic activities were measured at 1, 3, 5, 7, 15, 30 and 60 days of the incubation period, whereas the 16S rDNA-DGGE profiles were determined at 0, 5 and 60 days. The enzymatic activities were significantly stimulated. The highest stimulation was found in the B2 treatment followed by B3, A2, A3, B1 and A1 treatments. Increasing the number of lower molecular weight proteins in the BS enhances the stimulation of soil enzymatic activities. The application of BS caused at 5 days of the incubation period temporal variations in the soil bacterial community structure.

References

Jun 21, 2001·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·G RanalliC Sorlini
Dec 16, 2006·Current Microbiology·E Vasileva-TonkovaA Gushterova
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Jul 3, 2007·Bioresource Technology·J ParradoM Tejada
Mar 24, 2009·Journal of Environmental Management·Ashish PathakT R Sreekrishnan
Oct 19, 2010·Journal of Hazardous Materials·Manuel TejadaCarlos García
Apr 10, 2012·The Science of the Total Environment·Neus RoigJosé L Domingo
Jun 23, 2012·Environmental Technology·Reginald E MastoAwadhesh K Sinha

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Methods Mentioned

BETA
size-exclusion chromatography
PCR
electrophoresis
electrophoretic profiles

Software Mentioned

Statgraphics Plus
Quantity One

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