№ 6 (51) июнь, 2018 г. Giving of calcium nitrate at the first step of 50-75% from necessary norm raises speed of filtration about 3200 kg/m2 hour to 5200 kg/m2 hour at the expense of formation of larger crystals of dicalciumphosphate. Increase рН from 4,07 to 5,50 promotes exit increase dicalciumphosphate from 84,60 % to 99,13 %.