FOSFORTRANSPORTER SOM UNDERLAG FÖR BESLUT OM ALTERNATIVA LÖSNINGAR FÖR RENING AV AVLOPPSVATTEN FRÅN SPRIDD BEBYGGELSE / Phosphorus transports as basis for deciding alternative solutions to handle waste water from scattered residences
Small drainage areas with a growing but still sparse population often constitute a problem in environment protection work because quantitative data to support decision-making and more long term sewage-handling strategies are lacking. In this study transports strictly measured from water-quality data were compared to transports calculated from landlosses and estimated discharges from an inventory of […]
AVLOPPSVATTENBEHANDLING PÅ FARTYG / Sewage Treatment on Ships
International Maritime Organization, IMO, has in Marpol Annex IV tried to achieve an international regulation of marine sewage pollution. Marpol is not yet in force, but some areas are regulated by states and conventions, e.g. the Baltic convention whose rules in principle are the same as Marpol Annex IV. It is already in force for […]
HELSINGFORSKONVENTIONEN – KONVENTIONEN OM SKYDD AV ÖSTERSJÖOMRÅDETS MARINA MILJÖ, The Helsinki Convention – The Convention on the Protection of the Marine Environment of the Baltic Sea Area
The Helsinki Convention – The Convention on the Protection of the Marine Environment of the Baltic Sea Area comprises the Baltic Sea proper with the Gulf of Bothnia, the Gulf of Finland and the entrance to the Baltic Sea. The Convention is ratified by all Baltic Sea states i.e. Denmark, the Federal Republic of Germany, […]
CHEMICAL OXYGEN DEMAND (CODcr)-RESULTS OBTAINED BY THE CLOSED TUBE METHOD AND THE STANDARD PROCEDURE ARE IN AGREEMENT
A comparison was made between the Nordic standard and the small-scale closed tube method for the determination of CODcr. The closed tube method studied follows the standard procedure except that the sample and reagent volumes are one fifth of those in the standard. The results from the two methods are in good agreement and the […]
FOSFOROMSÄTTNING INOM HÖRBYÅNS AVRINNINGSOMRÅDE / Phosphorus Turnover in the Watershed of the River Hörbyån
Lake Ringsjön in Scania, southern Sweden, has been very eutrophicated during a comparatively short time. In spite of advanced municipal waste water treatment for phosphorus removal, no improvements have been observed in lake water quality. The reasons are release of P from the sediments and an extremely large external loading on two of the basins […]
DIMENSIONERING AV PERKOLATIONSMAGASIN MED REGNENVELOPPMETODEN OCH MAXDYGNSMETODEN, Design of Percolation Basins with a Rain Envelope Method and the Max Day Method
The aim of the study has been to test the applicability of the so called Rain Envelope Method and the Max Day Method, respectively, for design of percolation basins. For a given depth the basin volume has to be designed to meet a certain required frequency of flooding. Flooding is defined as one or more […]
REMOVAL OF PHOSPHORUS AND RESIDUAL ALUMINIUM BY RECIRCULATING ELECTROLYSIS OF WASTEWATER
P removal from wastewater was examined by electrolysis in a recirculating closed water system employing alternating current with 0.0039 Hz frequency and Al electrodes. Adjusting pH to about 6 with HCl facilitated complete removal of P and residual Al
VATTENDATABEREDSKAP, Storage of waterdata for the future
To be prepared to handle the water problems for the future we must collect and store waterdata of different kind today. It is a difficult task to judge the necessary extent of that storage both regarding different variables and the frequency of the data collection
INFORMATIONSGAPET FORSKNING – TILLÄMPNING: HUR KAN DET MINSKAS? / How to Reduce the Information Gap between Research and Implementation?
The information gap between research and praxis is analysed with a background of the ongoing segmentation and specialization of human knowledge. The genesis of the information gap is analysed and applied on the Swedish water administration and Swedish water research. A way for reduction of the information gap is indicated in increased co-operation and interaction […]
HYDROLOGISKA FORSKNINGSBEHOV UNDER 90-TALET / Needs for Hydrological Research in the 1990’s
Environmental problems and technical systems in the society are fundamentally related to hydrology. Hydrology is a very comprehensive concept. In fact, there are at least ten independent disciplines within hydrology. Classical hydrology is a descriptive science with the water balance equation as almost the only means of quantifying computations. Hydrodynamics have now to some extent […]