Utfallet av riskvärderingsmatriser i va-verkens arbete med HaCCP / The outcome from risk value matrices in the HaCCP-work of water plants
Since January 1, 2006, new legislation from the European Union (among others; regulations EC 852/2004 and EC 882/2004) forces all food producers of the EU to include a hazard analysis based on the HACCP-principles in their internal control. HACCP (Hazard Analysis and Critical Control Point) is an international standard operated by the Codex Alimentarius Commission […]
Kvävet och havsmiljön runt Sverige / Nitrogen and the marine environment around Sweden
The arguments for and against nitrogen removal have been penetrated. Special attention has been taken to the report by the panel of experts Naturvårdsverket (the Swedish Environmental Protection Board) has ordered. None of the arguments for nitrogen removal have been found to be valid for either Baltic Sea or the west coast.Bothnian Sea can be […]
NITRIFICATION REACTIONS IN TREATMENT OF SUPERNATANT FROM DEWATERING OF DIGESTED SLUDGE
Separate nitrification of the reject water from dewatering of digested sludge has been studied at the Bromma sewage plant in Stockholm. Experimental studies were carried out in an SBR pilot plant. It was shown that a very high nitrification rate could be obtained in the reactor, about 30-40 g NH^-N/kg MLVSS, h. During the nitrification […]