Anaerobic effluent treatment at a chemical industrial complex
In order to test the feasibility of anaerobic treatment of an effluent from a chemical factory producing intermediates for synthetic fibres, test work with a 45 l UASB pilot plant was conducted. After conducting a successful pilot study a full-scale anaerobic effluent treatment plant including a 400 m3 combined buffer/pre-acidification tank and a 990 m3 Biopaq®-UASB reactor was constructed. The results of the pilot plant and the full-scale anaerobic treatment plant have been compared, similarities and differences in performance are presented and evaluated. COD removal efficiencies above 80% and BOD efficiencies in excess of 85 % achieved in the pilot trial were confirmed by the full-scale installation. Overall process design as well as operational data from the pilot trial as well as the full scale plant are presented. Despite the differences in configuration, operational results of the full scale plant are comparable to the results obtained from the pilot plant study making such a pilot plant a useful tool for the process design of an full-scale anaerobic effluent treatment plant.