Reynolds number Technology: general issues anion-exchange membrane anodic oxidation anthocyanins biofouling casein chronopotentiometry cleaning concentration polarization deaerator deodorization electrochemical acidification electrochemical impedance spectroscopy electroconvection electrodialysis enzymatic cleaning flow flush food industry foulant identification fouling fouling mechanisms herring milt hydrolysate hydroxyl radicals impedance spectroscopy ion-exchange membrane mechanical and electrochemical properties mineral scaling mode of current modelling and experiment