Işık, Mustafa13.07.20192019-07-1613.07.20192019-07-1620081018-4619https://hdl.handle.net/20.500.12451/2919Calcium precipitation problems have been experienced with the processes of water usage, and water and wastewater treatment. This paper reported experimental results on the effect of a urea hydrolyzing culture on the precipitation process of calcium carbonate precipitation from a synthetic wastewater. Experimental studies were carried out with incubation of cultures into the domestic synthetic wastewater containing urea, calcium and glucose under batch conditions. Slight calcium removal was obtained while nitrification inhibited the precipitation of calcium without adding glucose to the medium. Daily glucose adding resulted in the 92% calcium removal at a hydraulic retention time of 6 days. Also, kinetic coefficients of urea hydrolyzing mixed culture were found as 0.28 hour -1 0.16 hour-1 0.59 g VSS/gCOD and 242 mg L-1, for k, µmax, Y, and K S, respectively. Batch experiments significantly show that ureolytic microbiological carbonate precipitation has a considerable potential for Ca 2+ removal from the synthetic wastewater. © by PSP 2008.eninfo:eu-repo/semantics/closedAccessBiocatalyticCalcificationCalciumKineticUreaArticle172197202N/AN/A