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Installatiehandleiding geoTHERM 0020132508_00 15
4
Waterbestanddelen Concentratie in
mg/l
Koper Edelstaal
(1.4401)
Ijzer, opgelost
Fe **
<0,2
>0,2
**
Mangaan, opgelost
Mn **
<0,1
>0,1
**
Aluminium, opgelost
Al
<0,2
>0,2
Zwavelwaterstof
H
2
S
<0,05
>0,05
Sulfide
SO
3
<1

Chloorgas, vrij
Cl
2
<0,5
0,5 - 5
>5
/
/
Ammoniak
NH
3
<2
2 - 20
>20
Koolzuur, vrij agressief
CO
2
<5
5 - 20
>20
Zuurstof
O
2
<2
>2
Sulfaat
[SO
4
]
2-
<70
70 - 300
>300
/
Waterstofcarbonaat
HCO
3
-
<70
70 - 300
>300
Verhouding
HCO
3
-
/[SO
4
]
2-
<1,0
>1,0
/
Chloride
Cl
-
<300
>300
Nitraat, opgelost
NO
3
<100
>100
Optische eigenschap-
pen ***
Grenswaarde helder,
kleur-
loos
helder,
kleurloos
Water
Totale hardheid
4,0- 8,5 °dH

pH-waarde <6,0
6,0 - 7,5
7,5 - 9,0
>9,0
/
Elektrisch geleidings-
vermogen (bij 20 °C)
<10 S/cm
10 - 500 S/cm
>500 S/cm
4.2 Grenswaarden bronwaterkwaliteit
= in het normale geval goede bestendigheid
= corrosiegevaar voorhanden; indien meerdere evaluaties met
voorhanden zijn: kritiek
= ongeschikt
**) Om een verokering, vooral van de retourbron te vermijden, moe-
ten voor ijzer (Fe) de grenswaarde <0,2 mg/liter en voor man-
gaan (Mn) de grenswaarde <0,1 mg/liter absoluut in acht geno-
men worden.
***) In het grondwater mogen onafhankelijk van wettelijke voor-
schriften geen troebelingen of afzetbare stoffen voorhanden
zijn. De fijnste vuilpartikels, die tot de vertroebeling van het
water leiden, zijn ook door filters niet elimineerbaar en kunnen
zich in de verdamper afzetten en de warmteoverdracht ver-
slechten.
15


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