A LIQUID TREATMENT MODULE

A liquid treatment module (2), configured for ultraviolet (UV)-light treatment of a liquid (4) flowing through a first treatment chamber (6) defined as a first elongated circumferential hollow cavity (8) between an outer surface (10) of a first translucent inner sleeve (12) and an inner surface (16) of a first outer sleeve (18′) configured to enclose said first translucent sleeve (12). The inner sleeve (12) is arranged to protect and include a UV-light treatment lamp (14). The module comprises a module inlet connection (20) configured to receive liquid to be treated and a module outlet connection (22) configured to expel liquid treated by the liquid treatment module. The module comprises: -first liquid flow guiding members (24′) configured to guide and direct a liquid flow (26) from said module inlet connection (20) into said first treatment chamber (6), -second liquid flow guiding members (28′) configured to guide and direct a liquid flow (30) from said first treatment chamber (6) into a second treatment chamber (32′), and -third liquid flowing guiding members (34′) configured to guide and direct a liquid recirculation flow (36) from said second treatment chamber (32′) back into the first treatment chamber (6) again.