Treatment of waste water (WW) at factories which produce such products as khalva, mayonnaise, mustard, horseradish, dry food concentrates mixtures to cook jellies, cakes causes some difficulties as they contain much fats, oil, proteins, suspended matters, soluble materials (sugars, carbohydrates, acids, salts). The composition of waste water often depends on the production assortment, so the purification becomes more difficult. It was found previously that a combined scheme of waste water treatment at such a factory using electrocoagulation and electroflotation methods is the most acceptable.A hardware-technological scheme has been developed on the basis of the laboratory investigations, a pilot plant has been designed and manufactured. The plant consists of pump, head tank , rotameter , electrocoagulator  with conditioning chamber , electroflotator  with setting chamber , two power sources , and foam collecting chamber . The capacity of such a plant is 200 l/hour. Electrocoagulator 4 with a volume of 6 dm3 was manufactured of organic glass 10 mm thick, the electrodes were made of plane parallel aluminum plates or D-16 alloy 3 mm thick with a spacing of 5 mm. Cathodes and anodes (in sets of 7) are in turn connected to their bus leads through which the electric current is supplied. The set of electrodes is arranged at the top.The electrocoagulator has its own conditioning chamber 5 to form the adsorbent flakes and to adsorb the components-contaminants on them. The chamber is divided by an internal partition wall in order to increase the liquid path. The chamber volume is 3 dm3.Electroflotator 6 includes a case made of organic glass 10 mm thick, a set of electrodes and a foam-removing device. The case is rectangular with a working volume of 14 dm3, the upper part having the form of a truncated pyramid for compression and partial dehydration of the foam product. The liquid in the working chamber is 50 cm high. The liquid was laterally supplied through a receiving part under the electrodes in such a way that it was uniformly distributed across the whole cross section of the apparatus. Sediment chamber (7) is provided in the apparatus from which the cleaned water is removed. The foam product, consisting of the particles of the suspended aluminum hydroxide matters with the adsorbed components-contaminants, is gathered in the upper part of the electroflotator with the help of the vacuum foam remover in the foam collector and then is recovered. The set of electrodes in the electroflotator consists of 8 cathodes and 8 anodes (12Х18Н10Т stainless steel) 3 mm thick were also in turn connected to the bus leads. The power source for electrocoagulator (7) ensures the direct current up to 100 A, and for electroflotator (8) up to 10 A at the voltage to 12 V. The plant has been tested with the industrial waste water at a food concentrates factory. The purification procedure consisted in a complex of the subsequent interdependent processes of waste water treatment in the electrocoagulator and electroflotator: the supply of waste water into the head tank placed at a height of 2 m over the plant, filling of the electrolyzer with the liquid with a rate of 3.3 l/min, the supply of electric energy with a electric parameters (Current - 60A for electrocoagulation and - 6A for electroflotation. Voltage – to 12V and 5.0-6.0V) to the electrocoagulator electrodes, the filling of the electroflotator with waste water treated in the electrocoagulator and supply of electric current to the electroflotator electrodes, the starting of the foam collector and the valve to remove the purified waste water. The results have shown that the waste water after treatment in the electrocoagulator and electroflotator contains no proteins, maximum allowable concentrations of fats and suspended matters; only the content of dry (soluble) matters such as sugars, acids, salts is hardly changed. The decrease of them is negligible.   Thus, the test of the pilot plant with the capacity of 200 l/hour has shown that the combination of electrocoagulation with electroflotation makes possible a successful purification of waste water with a high content of proteins, fats, suspended matters and other contaminants.