KVÄVEREDUKTION VID NITRIFIERING AV REJEKTVATTEN MED SBR-TEKNIK / Nitrogen Reactions during Nitrification of Reject Water with SBR Technics
Experiments with nitrification of reject water by use of SBR technics at Bromma sewage treatment plant have shown that it is possible to obtain a complete nitrification at high reaction rates. The oxygen concenration was the main operational parameter that mfluenced the nitrification rate. Moreover the initialammonium concentration had a certain influence. The experiments showed […]
KVICKSILVEREXPONERING HOS FRITIDSFISKARE. Resultat av undersökning av kvicksilverexponeringen från konsumtion av insjöfisk hos fritidsfiskare i Ljusnarsbergs kommun, Örebro län / Exposure of Mercury on Sports Fishermen
By order of the Environment and Health Committy in the Community of Ljusnarsberg and as a part of the Community’s work for public health the Environment and Health Department has, during 1992, made an inquiry about the consumption habits of inland sea fish among sports fishermen living in the Community of Ljusnarsberg. The purpose of […]
INVÄNDIG KORROSION AV KOPPARLEDNINGAR FÖR DRICKSVATTENDISTRIBUTION / Internal Corrosion of Copper Pipes for Drinking-Water Supply
Copper is a common material in building plumbing system. Copper pipes corrode in different ways wich have consequences for the useful life of the pipe and also for water quality. From a water quality point of view, the uniform corrosion is of imponance. This type of corrosion, resulting in high copper content, is common at […]
HYDROLYS OCH RECIRKULATION AV KOMPONENTER UR AVLOPPSSLAM SOM NY DISPONERINGS METOD / Hydrolysis and Recycling of Components from Sewage Sludge (as a New Disposal Method)
New legislation in Sweden will lead to the elimlnation of landfills as a disposal method tor sewage sludge and new alternatives are under investigation. By employing thermal hydrolysis and separation techniques the sludge can be split into new components that have a market value which exceeds the value of their use as fertiliser. The process […]
OBSERVATIONERAVSLAMEGENSKAPER 1 EN SBR-REAKTOR MED NITRIFIERING AV REJEKTVATTEN / Observations of the Sludge Properties in a SBR Reactorwith Nitrification of Reject Water
At Bromma wastewater treatment plant experiments have been performed with nitrification of reject water by use of SBR technology (Sequencing Batch Reactor technology). Obtained results have shown that the sludge has good sedimentation properties and a high proportion of nitrifying bacteria. It was possible to decantate in pilot plant studies at least 40 % of […]
ACASE STUDY ON THE SLUDGE CHARACTERISTICS IN BIOLOGICAL NUTRIENT REMOVAL PILOT PLANT AT THE SJÖLUNDA WASTEWATER TREATMENT PLANT IN MALMÖ
It has been found in several studies that the sludge settleability may deteriorate when a biologicai nutrient removal process is applied. However, so far only a few studies on the sludge characteristics at Swedish wastewater treatment plants with biological nutrient removal have been reported. A rwo-year study (august 1991-july 1993) at the Sjölunda wastewater treatment […]
KÄVEREDUKTION GENOM NITRIFIKATION I BIOLOGISKA BÄDDAR OCH EFTERDENITRIFIKATION – FÖRSÖK VID BJUVS AVLOPPSRENINGSVERK / Nitrification in Trickling Filters followed by Denitrification – Pilot Tests the Municipal Wastewaier Treatment
Trickling filters are normally considered to be difficult to use in systems designed for nitrogen removal. If the load of organic substances is low or can be reduced to a sufficiently low level, a trickling filter can however be used for nitrification and denitrification can be obtained in a succeeding denitrification process. This might be […]
RADON IN WATER – A WATER QUALITY PROBLEM?
Unhealthy indoor climate in residential buildings has been the subject of intensive research in recent years, the purpose being to find the cause and to minimize health risks. One factor that has come under attentions radon and its decay products which when inhaled may give rise to lungcancer. Radon in drinking water can be a […]
ALKALINITETSHÖJNING SOM KORROSIONSSKYDD I DRICKSVATTENLEDNINGAR. Metodik och resultat från uppföljningsarbetet i Göteborg / Increase of Alkalinity for Corrosion Prevension in Drinking Water Pipes Methods and Results from the Following-up Programin the Town of Göteborg
In order to reduce the red water problem in Göteborg, water quality was changed with respect to alkalinity and hardness. The raw water is very soft. By adding lime and carbon dioxide in the end of the water treatment process alkalinity is increased from 18 to 60 mg hydrogen carbonate/1. At the same time the […]
FÖRSÖK MED MIKROSAND SOM FLOCKHJÄLPMEDEL VID RINGSJÖVERKET / Tests with Microsand as a Coagulant Aid at the Ringsjö Plant
At the Ringsjö plant, laboratory and pilot scale tests has been carried out with a process for water treatment where the conventional process coagulation-flocculation-sedimentation is accelerated by dosing of microsand in the flocculation step. The microsand improves the sedimentation velocity of the flocs formed, while at the same time reducing the flocculation time needed. The […]