A multivariate analysis was applied to monthly climatic, hydrologic and water quality series of Lake Engelsholm, a shallow lake that was subjected to biomanipulation. In this study, we focused on identifying the most important patterns of monthly time series after biomanipulation. Moreover, we tried to quantify how those variables are interconnected with each other. A […]
Författare Fábio Pereira, Carlos Ruberto Fragoso Jr, Cintia Uvo, David da Motta Marques
Nyckelord (Keyword) Ecological modeling, principal component analysis, cluster analysis, biomanipulation, Lake Engelsholm
Detta är en översiktsartikel som ger inblick i nationalekonomins syn på och behandling av vatten. Artikeln förklarar begreppet värde och presenterar en rad metoder för att värdera vatten samt vilka svårigheter som finns med vattenvärdering. Vatten som en faktor i den globala ekonomin diskuteras också, samt att en rad möjliga lösningar på vattenrelaterade miljöproblem. Artikeln […]
Using data gathered by the WASHCost project in Ghana, this study uses cost functions to predict capital expenditure for construction of piped water systems for small towns in Ghana. The data was collected from 45 small towns in peri-urban areas in the Volta, Ashanti and Northern regions of Ghana. Correlation and multiple regression analyses are […]
Författare Kristoffer Ristinmaa, Kwabena Biritwum Nyarko and Bismark Dwumfour-Asare
Nyckelord (Keyword) Ghana, small town water system, cost function, capital expenditure, multiple regression analysis
The objective of this study was to improve the aeration efficiency of a mid-size Swedish wastewater treatment plant in full-scale trials. The full-scale trials were performed at Sternö wastewater treatment plant, which was built in 1997 and is designed for 26,000 population equivalents. The biological treatment at Sternö wastewater treatment plant is performed in two […]
Författare Viktor Larsson, Aleksandra Lazic´, Bengt Carlsson
Nyckelord (Keyword) Aeration, aeration control, energy savings, fine bubble diffusers, wastewater treatment, nitrogen
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