Verbitskii Vitalii Gennad'evich

Deputy Director-Chief Engineer, Wastewater Disposal Branch, SUE «Vodokanal of St. Petersburg» 1 Bely Island, 198184, St. Petersburg, Russian Federation, tel.: +7 (812) 713-98-89, e-mail: Verbitsky_VG@vodokanal.spb.ru

• Method of calculating gas volume and its travel direction in a sewer