NEW TREATMENT OF HARD DRINKING WATER – INFLUENCE ON COPPER CONTENT AND ORGANIC MATTER / Ny dricksvattenbehandling – inverkan på kopparutlösning och organiskt material
Hard drinking waters give problems in several respects. The copper content can be > 2 mg/l after stagnation. The use of detergent is increased and discouloration can occur. Uppsala water work has developed a process to decrease the alkalinity and hardness of the water in a way that does not use special chemicals. The process […]
VILKEN ÄR NYTTAN MED ÖRBY INFILTRATIONSVERKSAMHET FOR VÄSTRA SKÅNE? En systemanalys …/ What are the benefits of The Örby recharge activity to the western region of Scania? A system analysis …
The Örby field is located right south of the city Helsingborg in southern Sweden. This field contains inter alia a water recharge activity and housing areas. Municipalities, like Helsingborg, are responsible for ensuring a balance both in the supply of water as well as dwellings. On the Örby field this leads to a conflict of […]
ÖPPEN DAGVATTENAVLEDNING I AUGUSTENBORG / Open stormwater system in Augustenborg
Within urban stormwater management, long based on the principle of draining water as fast as possible from cites, new solutions are now being suggested. These new solutions not only protect against flooding, but also have other purposes such as pollution control and creation of recreational areas. In this paper several structural management practices (BMPs) are […]
Assessment of drinking water treatment using Moringa Oleifera natural coagulant / Värdering av Moringa Oleifera för fällning av dricksvatten
In this study, a comparison between Moringa Oleifera MO and aluminium sulphate was conducted for coagulation of turbide water using jar test. The optimum coagulant dosage was investigated for different levels of turbidity, and the impact on treated water properties monitored. Use of MO together with direct filtration was also investigated. Coagulation with aluminium sulphate […]
Vombsjön – ett ramdirektivprojekt / Vombsjön – a Water Framework Directive project
The Vomb lake is centrally located in the south of Sweden and is an important source for drinking water. Sydvatten AB (water company) delivers drinking water to about 300 000 inhabitants. There is an intensive agricultural activity within the catchment area, where nutrients as well as pesticides are being used. The objective of the project […]
Nitrogen removal efficiency and nitrification rates at the Sequencing Batch Reactor in Nowy Targ, Poland / Kvävereduktion och nitrifikationshastigheter vid SBR-anläggningen i Nowy Targ, Polen
Biological nitrogen removal by the use of Sequencing Batch Reactors (SBR) is today an accepted and well proven model. The Nowy Targ SBR plant has been in operation for 15 years, and comprehensive performance data are available for assessment. This paper focuses on the 2005 year operation, characterised by high organic and nitrogen loading and […]
Nutrient reductions in the Gothenburg waste water treatment plant and their effects on nutrient concentrations and chlorophyll in the estuary of river Göta älv
Response to variations in nutrient inputs to the southern estuary of river Göta älv on the Swedish west-coast is investigated by means of estuarine nutrient and chlorophyll (Chl-a) data from 1990–05. The estuary receives nutrients from the river, and from the Gothenburg Waste Water Treatment Plant (WWTP). Since 1972, when the WWTP was built, the […]
ETT ALTERNATIV TILL ORGANISATIONSUTVECKLING FÖR AVRINNINGSOMRÅDEN I SÖDRA SVERIGE
EU has recently adapted a frame directive for Water. Within three years the present organisation for Water Conservation in Sweden has to be completely restructured. At regional level there will be a number of River Basin Authorities. Agencies for implementation will be organised at local levels and district levels, based on geographically identified river basins. […]
ANVÄNDNING AV VÅTMARKER FÖR KOMMUNALT DAG- OCH AVLOPPSVATTEN Nuläge och framtida trender / Use of wetlands for municipal storm- and waste water. Present state and future trends
To treat water of varying quality, composition and origin in constructed wetlands has attracted increased attention in recent years in Sweden. In agricultural districts this interest has been manifested by the creation of wetlands to prevent nutrient leakage, while in urban areas by the establishment of wetlands/ponds to purify and balance storm water flows, or […]