SEWAGE TREATMENT PLANT Russian patent published in 1997 - IPC

FIELD: treatment of waste containing petroleum products and suspended substances. SUBSTANCE: sewage treatment plant has preliminary settling chamber which is connected with receiving reservoir by means of hydraulic cyclone and with after-purification chamber by means of pipe line for feeding the liquid to filter of after-purification chamber. After-purification chamber is provided with partition and plates mounted on either side of partition at angle of 30 to 45 deg relative to side walls. Distance between base of chamber and lower edge of partition and plates is equal to 1/50 of height of chamber. EFFECT: enhanced efficiency of sewage treatment and reduced time of purification cycle. 2 cl, 1 dwg, 1 tbl