SMALL SEWAGE TREATMENT WORKS AND THE WATER POLLUTION CONTROL

In this study possibilities of small sewage water treatment and disposal in regions only partially provided with spwerages are discussed from the point of view of water pollution con- trol. It emphasises the qualitative and quantitative effects of small sewage treatment works of the hydrologic cycles of settelements (Figs 1 and 2). It im-estigates the possibilities of waste water disposal in regions not provided with sewarage and it evaluates the partial and total storage and transport of waste water - discharge it into soil by infiltration, and - discharge it into streams as possible solutions in Hungary. It descrihes the possible solutions of individual sewage treatment and points out the effect of different methods of treatment on the quality of water. Finally it advises on the most important tasks. which are the definition of the concept of sewerage in a more differentiated manner. the establishing of a limit valne for sewerage and the determination of the operational conditions of small, individual sewage treatment satisfying the requirements for the water pollution control.