The article presents the issues concerning physical and chemical parameters of raw sewage from the production of printed circuit boards and the composition of the bath used technology in terms of meeting the requirements for the introduction of treated wastewater into surface waters, ground or the municipal sewage system. Showed test results for the removal of organic compounds and ions complexed copper (II) and tin (II) and (IV) using coagulants containing ions of Fe (II) and Fe (III). The studies showed the high efficiency of removal of organic compounds and tin compounds. Explained the possible causes of the difficulties of precipitation complexed copper ions (II).