Ohmic heating vessel was made of clear acrylic plastic.
Rectangular acrylic vessel (12x12x12 cm. and 0.5 cm.
thickness) was thermostatically controlled to maintain the set
heating temperature (+2oC) using a temperature control
system (Micro controller model JCS-33A-R/M, Shinko,
Japan). The electrodes (stainless steel 316L) of vessel units
was connected to a low voltage AC slid up transformer
(Model TDGC2-3KVA, UNION, Taiwan), which provide
voltage about 0-270 volt.