The concentrations of chloroform, carbon tetrachloride, dibromochloromethane, bromoform, methyl chloroform and perchloroethylene have been determined at 13 stations in the area of the petrochemical centre at Stenungsund. The concentrations of methyl chloroform and perchloroethylene confirm a water exchange of Askeröfjorden of 5-15 % per day. Large variations of the halocarbon concentrations at depths of 1 […]
Författare
KATARINA ABRAHAMSSON, DAVID DYRSSEN, GABRIELLA JOGEBRANT and MIKAEL KRYSELL
Nyckelord (Keyword)
petrochemical industries, effluents, fjord water exchange, mixing, halocarbons, tracers.
Årgång
1989
Nummer
1
Utgåva
Asketjern/Blaker waterwork (ca. 5,500 persons) was until 1985 supplied with acid, soft surface water with a high humus concentration. The distribution system consists mainly of asbestos cement and cast iron pipes, and severe corrosion occurred. pH near 11 was measured at end points of asbestos cement pipes. There was no treatment for corrosion control. From […]
Författare
MONA WEIDEBORG and AUD-INGER RASMUSSEN
Nyckelord (Keyword)
waterwork, corrosion, water quality
Årgång
1989
Nummer
1
Utgåva
Reverse osmosis was found to reduce >90 % of the nitrate content in ground water from two different wells. Alternatives like ion exchange (e.g. CARIX) were found in literature.
Författare
JÖRGEN WESTERLUND, MATS NYMAN, and ROBERT HÖGLUND
Nyckelord (Keyword)
reverse osmosis, ground water, spiralwound module
Årgång
1989
Nummer
1
Utgåva
Production of drinking water by slow filtration is an old method getting new aspect nowadays. Filtration mechanism is on principle the same as in other granular filters. Dispersed matter is destabilized by biochemical activity of microorganisms. Separated organics retained in the filter for several months/years are degradated by aerobic digestion instead of being removed by […]
Författare
ZDENEK VOR
Nyckelord (Keyword)
humic substance, aluminium, odour and taste, separation mechanism.
Årgång
1989
Nummer
1
Utgåva
This paper introduces different intermittent biological treatment methods of waste water to the Swedish public. Intermittent methods are widespread internationally, but seldom used in Sweden. The following methods are presented: – the Intermittent Cycle Extended Aeration process (ICEAS) – the phased isolation ditch process, namely the ”biodenitrosystem” – the Sequencing Batch Reactor process (SBR). The […]
Författare
STIG MORLING
Nyckelord (Keyword)
sequencing, Batch Reactor, nitrogen removal, Intermittent treatment methods
Årgång
1989
Nummer
1
Utgåva
The current debate concerning land application of sewage sludge is briefly reviewed. Of major concern in the public debate today is the presence of organic micro-pollutants in the sludge. Sludge quality data from Swedish plants related to trends in contents of heavy metals, PCB and DDT are discussed. A large decrease can be noted. This […]
Författare
OLA PALM, ALF-GÖRAN DAHLBERG, and HANS HOLMSTRÖM
Nyckelord (Keyword)
sewage sludge, heavy metals, organic micro-pollutants.
Årgång
1989
Nummer
1
Utgåva
The spreading of heavy metals from a metal rich deposit in surface waters is examined from measured concentrations in draining rivers and a series of lakes downstream the deposit, during a period of 3 years. The decreasing concentrations observed in the lakes appear to be the result of mixing of effluents from the deposit with […]
Författare
KARSTEN HÅKANSSON, BO BERGBÄCK, STEFAN KARLSSON and BERT ALLARD
Nyckelord (Keyword)
cadmium, copper, lead, zink, drainage system
Årgång
1989
Nummer
1
Utgåva
The present study has shown that surface water, groundwater and soil, even in areas far from industrial emissions, contain large pools of adsorbable, organic halogens (AOX). Gel chromatographic fractionations and studies of adsorption of AOX on activated carbon at different pH values indicated that a considerable fraction of the organohalogens are associated with high molecular […]
Författare
GUNILLA ASPLUND, ANDERS GRIMVALL and BO WIGILIUS
Nyckelord (Keyword)
natural production, organohalogens, AOX, soil, water, humic substances.
Årgång
1989
Nummer
1
Utgåva
Volatile organics in bottled waters from Sweden were analysed by stripping enrichment followed by gas chromatography (GC/ECD and GC/FID) and chromatographic sniffing. The GC/FID analyses showed that measurable amounts of organic substances leached from plastic (PET) bottles and Tetra-Brik packages. Chromatographic sniffing showed that the earthy or musty off-flavours, often found in tap water were […]
Författare
ROGER SÄVENHED and ANDERS GRIMVALL
Nyckelord (Keyword)
mineral water, trace organics, off-flavours, stripping analysis, adsorbable organic halogen.
Årgång
1989
Nummer
1
Utgåva
In this paper the interaction between legislation and municipal administration is focused on the relationship between land use and ground water contamination. In two cases – Vadstena and Kinda – the weak protection of the vulnerable ground water from different land use activities is illustrated. Today the administration is organized for and aimed at handling […]
Författare
HANS LÖNEGREN
Nyckelord (Keyword)
groundwater protection, land use, legislation, local administration.
Årgång
1989
Nummer
1
Utgåva
In areas with intensive agriculture land use conflicts between the agriculture land use interests and the drinking water supply protection interests are frequent. Precise methods for delimitation of Safety Control Areas are urgent. Two delimitation methods are demonstrated. The first one, delimitation by subwatersheds, is based on identifications of local hydrological interrelationships and their significance […]
Författare
REINHOLD CASTENSSON
Nyckelord (Keyword)
delimitation methods, safety control areas, drinking water supply, non-point pollution, intensive agriculture land use.
Årgång
1989
Nummer
1
Utgåva
The water treatment works named Borg delivers drinking water to about 100,000 inhabitants in Norrköping. Raw water is taken from the river Motala ström. Because of the raw water quality there are sometimes problems with bad taste and odour in the purified water. By pollution from a paper pulp factory with chlorine bleachery, situated upstreams […]
Författare
ANDERS TJEDER, MÅRTEN LIND, ARNE KRISTENSSON and INGVAR STENING
Nyckelord (Keyword)
taste, odour, organic chlorine, AOX granular activated carbon, GAC, GAC filter, mutagenicity.
Årgång
1989
Nummer
1
Utgåva