day as they were taken. Besides the health aspect and the consumers trust, the use of chlorine has also an environmental aspect, for example a large part of the AOX-content of the sewage sludge comes from the drinking water chlorination. Samples have also been taken where the water leaves the waterworks to the two areas. Some of these professionals may work with your contractor, builder or other home improvement professional to get the job done. At the beginning ammonia gas and chlorine gas was used, this was later changed to ammonium sulphate and sodium hypochlorite. The addition of ammonium sulphate is adjusted to get an internal chlorine consumption of 0,2 mg/l and a residual chlorine content consisting of chloramine when the water is pumped out to the distribution net of 0,3 mg/l (0,2 during winter). Keywords, drinking water, Ultraviolet disinfection, THM, AOC, Chloramine.
There are around one thousand Ultraviolet-installations running in Sweden, both at waterworks and in the distribution systems. The variable costs of the LCC was calculated for a time period of 20 years.
Arlanda till stockholm city, Försäkringskassan stockholm telefonplan, Radisson blu stockholm frösundavik, Vandrarhem stockholm söderort,
The chlorine dose is normally 0,5 mg/l. This points represents different distances from the waterworks (or different age of water). The drinking water is treated in two large waterworks, Lovo and Norsborg, and the total water production is about 130 million m3/year. For the 7-day HPC analyse 1 5 ml of sample was mixed with R2A agar and incubated for seven days at. This is performed just before the water enters the chlorine contact tank/reservoir with a residence time of 45 60 minutes. After the final pH-adjustment, ammonium sulphate is added to the water and then is hypochlorite added. Our low water temperature during winter (down to 1,5 0C) created problems for some of the equipment. We have had good opportunities to study the effects of the change in disinfection strategy since only one of the two production lines at Lovo waterworks were converted and the other continues with conventional chloramination.