Treatment of Industrial Wastewater Using a Mechanical Vapour Recompression Heat Pump System as a Source of Biomass

Abstract

A prospective method for treatment of wastewater from food and flavor industry with mechanical vapour recompression heat pump system, which achieves both recycling of purified water for repeated use and separation of waste with a high concentration of organic matters and use for production of biogas, is considered. Experimental results of wastewater treatment according to specified method are presented. A number of parameters of source wastewater and resulting concentrated sludge were compared: total microbial count, dissolved dry matter, undissolved dry matter, total dry matter, chemical oxygen demand, active reaction, electrical conductivity. It has been established that using the mechanical vapour recompression method for treatment of industrial wastewater two outflows are generated - of clean condensate with characteristics of pure distilled water and sludge rich in concentrated organic substances. Through use of the method, a waste-free technology for the treatment of industrial wastewater is realized.