Scholarly record

SURVEY ON SEDIMENTATION AND CORROSION POTENTIAL IN DRINKING WATER SYSTEM OF BEHSHAHR CITY

B. Nikpour, Z. Yousefi, M.NOSHADI M.S.Mortazavi

Abstract

Sedimentation and corrosion potential are the major problems that exit in all industries particularly in water industry which cause decrease of public health, water quality depletion, facilities and piping equipment scales. Thus their control leads to promotion of water health and quality. The purpose of this research is determination of the potential in drinking water network in Behshahr city, north of Iran.We used major indexes such as Langelier Index, Ryzner Index and Corrosion index. Samples are taken from 9 active wells, 1 spring, 2 reservoirs and 18 locations in the distribution system. In order to calculation these indexes we had taken 105 samples from Nov - March of 2005. Parameters such as pH, calcium hardness, alkalinity, temperature and total dissolved solids (TDS), measured according to the Standard Method for the examination of water and wastewater.The results indicated that Langelier Index values in wells, spring, reservoirs and distribution system are 0.28, 0.01, 0.2, 0.13 respectively that imply on balance condition and formation probability of Calcium Carbonate. Also Ryzner Index values are 6.81, 7.51, 7.04 and 7.12 respectively that imply on relative corrosion of surveyed samples. The results show that corrosion rate in distribution system is higher than reservoirs and resource samples. In order to promotion of citizens healthy. A modification water property to access favorite condition is necessary.

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