Characterisation of natural organic matter (NOM) in water treatment using seed extracts / Karakterisering av naturligt organiskt material i vattenrening med hjälp av fröextrakt
Stormwater is known to be a potentially large contributor of toxic substances to receiving waters. To be able to This study evaluates the potential of using natural plant extract in water treatment and its corresponding effects on the final treated water. Fluorescence excitation-emission matrices (EEMs) were used to characterise NOM in water treated using Okra […]
Pilot-Scale Iron Electrocoagulation for Natural Organic Matter Removal / Avskiljning av naturligt organiskt material med järnelektrokoagulering i pilotskala
A scaled-up, continuous iron electrocoagulation reactor was built for drinking water treatment research. The impact of current density (i), metal loading (ML) and inter-electrode gap (d) on the removal of natural organic matter (NOM) was studied at 1.35 L/min. Removal performance was evaluated using UV-abs-254 and DOC analysis. Larger d provided the greatest reductions in […]
Coastal Evolution at Nha Trang Bay, Vietnam / Kustutvecklingen vid Nha Trang-bukten, Vietnam
Over the past years the southern beach of Nha Trang, located in the south central of Vietnam, has started to indicate signs of erosion in the northern part. As the beach plays an important role for this touristic hotspot, the fear that the erosion will become severe has been raised. The limited knowledge and few […]
Environmental systems analysis of urban water systems – historical account of published work in scientific journals/ Miljösystemanalys av urbana vattensystem – historik av publicerade verk i vetenskapliga tidskrifter
This paper is a literature review of environmental systems analysis studies – adopting the LCA (life-cycle assessment) approach – of urban water and wastewater systems. Both with respect to the number of scientific journals referred to and the time-period of publication, the scope has been limited. The time period considered is 2000–2014, and the number […]
Quicker response to quality changes in incoming water with decision support for coagulant dosage at Görväln drinking water plant / Beslutsstödssystem för koagulantdosering på Görvälnverket ger snabbare respons på kvalitetsförändringar i råvattnet
A decision support system (DSS) for control of the coagulant dosage at the Görväln drinking water plant has been developed and implemented. The goal with the DSS was to enable the transition from manual to automatic control of coagulant dosage. The DSS is based on a multivariate statistical regression (PLS) model mimicking the operators’ manual […]
Structure and Properties of Peat Humic Substances / Struktur och egenskaper för humus från torv
Humic substances are formed in very different environment and the relations between properties (and structure) and precursor biota composition still is far from being clarified. The aim of this study was to analyse relations between properties of the peat, peat humic acids and humification degree on example of analysis of three bog profiles in ombrotrophic […]
NOM removal through coagulation, sedimentation and filtration as a remedial action to prevent adverse effects of re-growth in networks / Fjerning av NOM ved koagulering, sedimentering og filtrering som tiltak mot biofilmdannelse i ledningsnett for drikkevann
A qualitative and quantitative monitoring of biofilm formation was performed in four categories of water: raw water, filtered water (after removal of natural organic matter (NOM)), disinfected water and distributed water. The biofilm formation was reduced by 95–99 % as a result of the NOM removal, a reduction considerably more significant than indicated by the […]
The Effects of Catchment Soils and Land-use on the Relationship between Organic Matter with Chlorine Decay and THMFP / Hur jordart och markanvändning i avrinningsområdet påverkar sammansättningen av organiskt material, klorsönderfall och trihalometanbildningspotential
With significant problems caused by organics in drinking water, comprehensive knowledge of its concentration, character and reactivity in relation to catchment features and management is important. In a study reported here, six contrasting zero order catchments of the Myponga Reservoir, South Australia were selected to determine the impacts of catchment characteristics and land management practices […]