Summary:

In study presented of results research physico-chemical sewage in years 2002– 2004 in sewage treatment plant type SBR in place Sterkowiec-Zajazie in province małopolska. The Treatment plant started in 2001 year and expensed of 3,7 million PLN. Design of capacity in treatment plant is Q=600 m³∙d^-1, however in during of research to treatment plant in flu about 150 m³∙d^-1. About 8% sewer was drive tanker car with cesspool. Research concern to count size reduction in percent selects indexes pollution for example: BOD5, COD, total suspension witch primary group and ammonia nitrogen and total phosphates witch eutrophic group. Middle of value BOD₅ in sewage raw was 401,1 mgO₂∙dm^-3, however in clean sewer was 15,23 mgO₂∙dm^-3. Middle of value COD in sewage raw was 660,74 mgO₂∙dm^-3, however in clean sewer was 75,43 mgO₂∙dm^-3. Middle of value total suspension in sewage raw was 207,51 mg∙dm^-3, however in clean sewer was 22,17 mg∙dm^-3. Middle of value ammonia nitrogen in sewage raw was 161,34 mgNNH₄∙dm^-3, however in clean sewer was 3,84 mgNNH₄∙dm^-3. For total phosphates middle of value in raw sewer was 19,71 mgP∙dm^-3, and in clean sewer 4,67 mgP∙dm^-3. Reduction of indexes with primary group and eutrophic group was high. Middle for BOD₅ was 96%, for COD - 85%, for total suspension - 88%, for ammonia nitrogen 96% and for total phosphates – 76%. Size pollution in clean sewer (after sewage treatment plant) compare with current regulation. In most cases indexes in clean sewer was lower then current regulation. This provide of regularity processes in treatment plant.