TY  - JOUR
T1  - Geothermal Water Quality in Oued R’hir Valley (Southeast Algeria).Scaling Problem and Hardness Treatment
AU - , A. Messaitfa AU - , K. Baouia AU - , A. Meghezzi AU - , M. Saidi 
JO  - Research Journal of Agronomy
VL  - 1
IS  - 2
SP  - 80
EP  - 83
PY  - 2007
DA  - 2001/08/19
SN  - 1815-9354
DO  - rjagr.2007.80.83
UR  - https://makhillpublications.co/view-article.php?doi=rjagr.2007.80.83
KW  - Hardness
KW  -decarbonation
KW  -hydrated lime
KW  -sodium carbonate
KW  -geothermal waters
AB  - The conducts of drinking water supply in Oued R’hir valley, have been for a long time jeopardized by encrusting. Geothermal water, the only source of drinking water, has a high capacity tendency to form scale is the origin of this phenomenon. This water is highly mineralized (2.5 g L <SUP>1</SUP>) and of a very high degree of hardness (1120 mg L <SUP>1</SUP> as CaCO<SUB>3</SUB>). The maximum scaling rate (1.4 cm y <SUP>1</SUP>) is observed in the conducts located at the first kilometer of the water source, where the water temperature and pressure are very favorable. The calcareous mass produced is estimated at 1.6 g L <SUP>1</SUP>, or 2243 t y <SUP>1</SUP>. The treatment results show that hydrated lime process has very low efficiency (11.5%) facing water hardness, compared with that obtained by the sodium carbonate (61%). They, thus testify that water hardness dominated is the permanent hardness. Yet the process with Na<SUB>2</SUB>CO<SUB>3</SUB> added to produced water 255 mg L <SUP>1</SUP> of the sodium with the initial water content (323 mg L <SUP>1</SUP>) for each 682 mg L <SUP>1</SUP> as CaCO<SUB>3</SUB> of water hardness removed.
ER  -