Influence of chemically and biologically stabilized sewage sludge on plant-available phosphorous in soil

Phosphorus effects of recycled products from municipal wastewater on crops in a field experiment

“…However, Al-P contained in soil after the first growing season is thought to be available to plants in the coming growth season (e.g. Krogstad et al 2005), which was confirmed by this field experiment.…”

Phosphorus in Water Quality and Waste Management

“…The application of sewage sludge to pot experiments also resulted in low concentrations of water extractable P, which is positive. They caused a considerable accumulation of P with low plant availability in soil (50 -95 % increase) which represents a potential environmental risk due to the transport of erosion products by surface runoff to receiving waters (Krogstad et al, 2005). This also stressed the importance of inclusion of sludge application into fertiliser management as reported by Krogstad et al (2005).…”

“…They caused a considerable accumulation of P with low plant availability in soil (50 -95 % increase) which represents a potential environmental risk due to the transport of erosion products by surface runoff to receiving waters (Krogstad et al, 2005). This also stressed the importance of inclusion of sludge application into fertiliser management as reported by Krogstad et al (2005). Plant roots absorb exclusively dissolved inorganic phosphate, but its concentration in soil solution is low (Blume et al, 2010).…”

“…Also the test procedure for the determination of plant availability can be of substantial influence. There is consent that short term P-availability of iron or aluminium precipitated phosphorus in sewage sludge is restricted (Krogstad et al, 2005;Henke, 2000;Jokinen, 1990). Biological treatment with lime addition for P-removal resulted in sewage sludge with a P fertilisation effect comparable to inorganic P fertilisers as investigated in pot trials.…”

Nutrient recovery technologies for anaerobic digestion systems: An overview

“…High quality digestate fit for use as fertilizer is defined by essential features such as declared content of nutrients, pH, dry matter and organic dry matter content, homogeneity, purity (free of inorganic impurities such as plastic, stones, glass, etc), content of biological (pathogenic) material and of chemical pollutants (organic and inorganic) [20]. From an agricultural point of view, the main parameters to take into consideration are pH, salinity, nutrients, pathogens and heavy metals [3,13,21], while environmental concerns are inappropriate digestate handling, storage and application, which may led to ammonia emissions, nitrate leaching and phosphorous overdoses [22]. Table 1 shows the heavy metals, micro-and macro-nutrients composition of different AD digestate, which have been grouped in five categories [3,23]: (i) sewage sludge (SS); (ii) animal manures; (iii) food industry wastes; (iv) energy crops and harvesting residues; and (v) OFMSW.…”