PHOTOGRAPHIC LIQUIDS EFFLUENT DISCHARGE

摘要

Spent colour photography liquids comprising alkaline developer liquid and fixer liquid loaded with iron ions generate a dischargeable effluent, in which clogging of drains and conduits with precipitated iron oxides is minimized or avoided; the liquids are fed through separate feed ports into a vessel to form a liquid bath; liquid effluent is pumped or suctioned from the interior of bath to form an effluent flow; preferably the pumping or a suction is generated by flow of a carrier liquid such as water through a venturi passage, whereby the liquid effluent is entrained in the flowing water and discharged under pressure, the precipitated iron oxides being retained in a dispersed non-clogging state.