Optimization of PACl dose to reduce RO cleaning in an IMS

摘要: Abstract In order to ensure stable treated water quality and reduce chemical costs in any treatment plant it is necessary study optimize the coagulant dosing control (CDC). This research focused on affects of integrated membrane (UF & RO) system employed for industrial production. The dose (PACl) might be associated (partly) with frequency cleaning RO units, a value 20 abs/m UF permeate dosage process. could suggest that organic fouling directly indirectly (inducing biofouling as well) cause membranes. Nevertheless, high doses PACl produce scaling aluminium and, this work minimizing prevent operational problems membranes was focused. approach involved processes, determination optimum coagulant, evaluation removal efficiency UV DOC by coagulation. available data, which comprised monthly/weekly measurements period six years operation, studied analyzed an attempt made draw some conclusions regarding link absorbance control. revealed use simple robust online sensors like measurement allows automatic although parameter not found sufficient fully characterize nor predict during operation there no between after RO. Parameters, added allowed verify efficiencies removal. Coagulant depends level should never higher than long possible. However, target produced substantial over — 90% time – when considered only. same way, excess 5 mg/L, additional less 2.5% per mg coagulant/L, suggests current side. Furthermore, mg/L did significant removal, thus reduction from 14 (2005 dose) ca. 7 considered.