Water disinfection with electrolysis is an alternative for water treatment, which is receiving increasing attention from drinking and industrial water producers. With this approach oxidants are produced from electrolysis of water molecule and some of dissolved chemical compounds. To carry out the process of electrolysis the using of TinO2n-1 containing ceramic electrodes is possible. The obtained electrodes were used to form electrolytic cell. The total electrolysis cell resistance decreases if the current density applied to the electrolysis cell is increased. During electrolysis at constant current strength, the amount of chlorine, which is delivered in the process of electrolysis, was not dependent on the electrode surface. The technological parameters of process (flow rate, current intensity) have been established to obtain predetermined amount of released chlorine during electrolysis process. The specific work of electric current to release chlorine is decreased, if electrode surface area was increased and current intensity remains constant; but increased, if current density remained constant.