SMALL CAPACITY WASTE WATER TREATMENT PLANT

摘要

A plant for waste water treatment, in particular sewage water from small sources, for activation treatment by unified suspended activated sludge, created by a tank (1) wherein three functional spaces are provided, and namely an aerated oxic activation space (11), an anoxic de-nitrification space (9) and a separation space (10), the waste water inlet (19) being introduced into the anoxic de-nitrification space (9), the purified water discharge (21) being installed in the upper part of the separation space (10), the anoxic de-nitrification space (9) being connected with the oxic activation space (11), the oxic activation space (11) being connected with the separation space (10), and the plant being provided with a device for pumping the activated sludge from the separation space (10) into the anoxic de-nitrification space (9). Tank (1) has a shell coat (2) smoothly passing over onto shell bottom (3) of saucer shape, the tank (1) having downwardly decreasing horizontal cross section, and the functional spaces in the tank being created by inserting and fixing at least one separate innder structure (5) that is at least partially adjacent to the inner surface of coat (2) and-or bottom (3) of tank (1), for creating the division between at least two functional spaces, all functional spaces (9, 10, 11) having concave bottom shape.