Scientific Research Publishing

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=45304#.VL3_FizQrzE Author(s)    Valery Katz , Gedalya Mazor Affiliation(s) SCE—Sami Shamoon College of Engineering, Beer-Sheva, Israel . SCE—Sami Shamoon College of Engineering, Beer-Sheva, Israel . ABSTRACT This article is a continuation of the research, centering on a vacuum-filtration system, which is designed to reduce the concentration of calcium in water; a process is also known as—water softening. The problem of solving the concentration distribution of the initial (embryonic) particles of CaCO 3 -particles, which were introduced into the limited volume of the apparatus with a turbine agitator-pump, is addressed through the use of diffusion and deterministic-stochastic models of mass transfer. The solution of the extreme problem allows determining the most important process parameters, such as time of dispersions homogenization and the dispers...

Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=49031#.VDYm-VfHRK0 Author(s)    Holger Gulyas , Shidong Zhang , Ralf Otterpohl Affiliation(s) Hamburg University of Technology, Institute of Wastewater Management and Water Protection, Hamburg, Germany . Hamburg University of Technology, Institute of Wastewater Management and Water Protection, Hamburg, Germany . Hamburg University of Technology, Institute of Wastewater Management and Water Protection, Hamburg, Germany . ABSTRACT In order to avoid the loss of ammonia during solar drying of stored urine, low-tech stripping is suggested as a pretreatment process for ammonia recovery. The mass transfer of ammonia from stored urine with an initial pH of about 9...

Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=49031#.VDXvYVfHRK0 Author(s)     Holger Gulyas , Shidong Zhang , Ralf Otterpohl Affiliation(s) Hamburg University of Technology, Institute of Wastewater Management and Water Protection, Hamburg, Germany . Hamburg University of Technology, Institute of Wastewater Management and Water Protection, Hamburg, Germany . Hamburg University of Technology, Institute of Wastewater Management and Water Protection, Hamburg, Germany . ABSTRACT In order to avoid the loss of ammonia during solar drying of stored urine, low-tech stripping is suggested as a pretreatment process for ammonia recovery. The mass transfer of ammonia from stored urine with an initial pH of ab...