FULLSKALEFÖRSÖK MED BIOLOGISK FOSFOR- OCH KVÄVEAVSKILJNING VID DALBY AVLOPPSRENINGSVERK / Full-scale Investigation with Biological Phosphorus and Nitrogen Removal at Dalby Wastewater Treatment Plant
Biological phosphorus and nitrogen removal has been implemented in full-scale at the wastewater treatment plant in Dalby. An investigation of the performance of the process has been conducted during the later half of 1990 and the beginning of 1991. The results from the investigation show that is possible to run a combined biological phosphorus and […]
PILOTFÖRSÖK MED KOMBINERAD BIOLOGISK FOSFOR OCH KVÄVEAVSKILJNING / Pilot Plant Studies of Combined Biological Phosphorus and Nitrogen Removal
In november 1990 a new pilot plant for combined biological phosphorus and nitrogen removal was started up at Sjölunda sewage treatment plant in Malmö. So far (May 1991) the pilot plant studies have been focused on simultaneous phosphate uptake and denitrifikation. The results clearly show that it is possible to induce phosphate accumulating bacteria, under […]
INVERKAN AV NITRAT, SUBSTRAT OCH SYRE PÅ SYSTEM FÖR BIOLOGISK FOSFORAVSKILJNING / Influence of Nitrate, Substrate and Oxygen on Biological Phosphorus Removal Systems
In november 1990 a new pilot plant for combined biological phosphorus- and nitrogen removal was started up at Sjölunda sewage treatment plant in Malmö. As a complement to the investigations in the pilot plant, laboratory tests were carried out in cooperation with Sjölunda during the autumn and winter 1990-91. The aims of this work were: […]
DYNAMISKA PILOTSKALEFÖRSÖK MED OLIKA FOSFORBELASTNINGAR I EN BIOLOGISK FOSFORAVSKILJNINGSPROCESS / Dynamical Pilot-scale Experiments with Different Phosphorus Loadings in a Biological Phosphorus Removal Process
Experiments with three different phosphorus loadings have been conducted in pilot-scale. During an experimental period of 24 hour with normal loading the effluent concentration of PO4-P was stabile around 0.1 mg/1. The results show that even if the phosphorus loading is increased up to four times or if 60 % of a 24 h load […]
BIOLOGISK FOSFORAVSKILJNING, HISTORIK, MEKANISM OCH FRAMTID, Biological Phosphorus Removal, History, Mechanism and Future
In this paper the historical background to the process biological phosphorus removal is presented. The biochemical mechanism and future research work are discussed. Sammanfattning I föreliggande artikel presenteras den historiska bakgrunden till processen biologisk fosforavskiljning. Processens biokemiska mekanism och framtida FoU arbete diskuteras.
CHEMICAL PRECIPITATION IN PONDS FOR WASTEWATER TREATMENT Influence of Detention Time on the Separation of Phosphorus and Organic Matter
The use of pond systems for wastewater treatment is reviewed, especially with respect to the use of chemical precipitation. A field study was conducted at the pond system of Funäsdalen where lime is added to the wastewater. The removal of organic matter (CODCr) and phosphorus was investigated during a range of well-controlled wastewater detention times. […]
SKYDDSOMRÅDEN FÖR VATTENTÄKTER I GÖTEBORGS OCH BOHUS LÄN / Protection Areas for Water Supplies in the County of Göteborg and Bohus, South-Western Sweden
In the county of Göteborg and Bohus 90 % of the 740,000 inhabitants are dependent on municipal water, mainly from surface water resources. However, the number of groundwater wells exceeds that of surface water supplies, supporting the most densely populated areas. In spite of high vulnerability to pollution and lack of alternative water in case […]
EFFECT OF THE AERATION ZONE ON THE HYDRAULICS OF SUBSURFACE DRAINS FOR INFILTRATION WATER INTAKES
The aeration zone forms in the course of the infiltration intake operation as a result of basin floor clogging due to silt build-up. This zone was found to have a noticeable contribution to the hydraulics of the infiltration water intake. The aeration zone effect was investigated on a modified infiltration water intake model. The model […]
DETERMINATION OF PHOSPHORUS IN PULP AND PAPER MILL EFFLUENTS
A study has been made of two digestion procedures for the conversion of organically bound phosphorus to orthophosphate. The aim of the study was to establish if the procedures are applicable to pulp and paper mill effluents. The procedures selected were the standardized peroxodisulphate method and a method using strong acid for the digestion. The […]
WETLAND MANAGEMENT AND MUNICIPAL PLANNING – Resource Inventory, Information Management and Water Quality Benefits
Direct and indirect impacts on existing wetlands potentially threaten this resource. There is a need for more information about the nature and extent of wetland resources and potential impacts of human activities on wetland systems. This information can then be incorporated into integrated water- and land-use planning efforts at the municipal level. This paper presents […]