ESTIMATION OF THE QUALITY OF THE WASTE WATER EVACUATED FROM IASI AT THE LEVEL OF DANCU PURIFYING STATION

The waste water purified at the Purifying Station Dancu-Iasi is deviated in Bahlui River. The quality of waste water purified deviated in Bahlui river influenced the fauna and flora from this aquatic ecosystem. Take into consideration the quality of the waste water purified will establish the field of using, respectively in industry, irrigation, urbanity aims, aquaculture or tourism. The aim of our research consists in the estimation of waste water evacuated from Iasi town at the Purifying Station Dancu. In function of the level of pollution of water established the measures ofprevention and combat ofpollution respectively the special methods of treatment. The researches were done at the Purifying Station Dancu-Iasi. The preservation of samples realized into a period of three months, respectively March, April and May of2008, at the beginning of every month. The preservation of the samples realized at the level of the canalization system and at the level of effluent - mechanical and biological steps - in the purifying station.Remaking of samples realized in the laboratory of hydrobiology at the faculty of Animal Sciences, University of Agricultural Sciences and Veterinary Medicine Iasi. We determined the following parameters of water: temperature, pH value, quantity of suspension, alkalinity and the organoleptic properties, respectively color and odor. The results obtained indicated that the waste water evacuated at the level of Iasi town have a high content in biogenic substances and represent a danger for aquatic basins in which it will arrived. Thus, the analyses realized in the months March, April and May 2008fined inadequate values at the majority parameters of quality of waste water The odor and the taste was at 0degree (class 0 of quality) watter being inodorous; pH value was variable at the scale 7 - 7,3; the values of alkalinity registered values between 6,5 and 7,4 and the temperature presented values between 11 and 19 °C.