Bioengineering and Environmental Engineering Increasing requirements for animal husbandry to mitigate nitrogen and phosphorus surplus

The present report describes the actual situation in the German pig and poultry keeping and the necessity for reducing considerable nitrogen and phosphorus surplus to meet further legal specifications. Many nitrogen mitigation options are illustrated ranging from animal number reduction, indoor measurements in stables and exhaust air treatment up to a low emission manure storage and application. Beyond that, future demands on phosphate fertilizing which meets legal requirements and options for P removal from manures are outlined.