WASTEWATER TREATING SYSTEM, AND WASTEWATER TREATING METHOD

摘要

Provided is a wastewater treating system for suppressing the release of bad-smelling gases generated during an aeration treatment, into the atmosphere without enlarging the entire site area of wastewater treating facilities and the maintenance load on a bath structure. An aeration bath (14) is constituted to have a front step portion (14A) and a rear step portion (14B), and the front step portion (14A) is covered at the top with a cover top (16). A wastewater feeding member (22) feeds the wastewater to the vicinity of the bottom portion (14C) of the aeration bath (14), and the air is fed from an aeration blower (28) to the inside of a feed pipe (26) so that the air may be fed to the upper portion of the wastewater feeding member (22) in the aeration bath (14). To the front step portion (14A) of the aeration bath (14), there is connected a sea water line (30) for feeding sea water (SW) to the aeration bath (14). One end of a return pipe (34) connected at the other end to an absorber (12) is connected to the cover top (16) mounted on the front step portion (14A) of the aeration bath (14), and a draft fan (36) is arranged midway of the return pipe (34).