[Overfertilized water - underfertilized fields: approach to cycling and sustainable food supply [Bohuslaen]]

abonos aprovechamiento de desechos azote biomasa biomass biomasse compostage composting costos costs desechos engrais faeces feces fertilizers fosforo heavy metals heces higiene hygiene lodos residuales metales pesados nitrogen pathogens phosphore phosphorus reciclaje recycling sewage sludge sodio sodium sostenibilidad suecia sustainability sweden technologie technology tecnologia transport transporte waste disposal waste utilization wastes