COMBINED METHOD OF WASTEWATER TREATMENT OF A SMALL-CAPACITY BREWERY

Abstract

With the help of the proposed circuit of EMT, the method of simultaneous measurements of the static characteristics of the magnetic fluid: specific electrical conductivity χt, magnetic susceptibility kt and temperature t of the magnetic fluid, which is recommended to be used for wastewater treatment of breweries, was investigated. A combined method of cleaning has been developed and the appropriate technological scheme has been improved, which provides, together with the use of mechanical cleaning devices, the use of an additional filter for magnetizing wastewater samples, which includes a special zone for the introduction of a pre-calculated magnetic liquid. Thus, in the process of wastewater treatment, mini-breweries using the proposed combined method, after applying methods of pre mechanical cleaning, use the wastewater interaction and the magnetic fluid: after intensive stirring of the mixture, the droplets of magnetic fluid dissolve in impurities and a weakly magnetic fluid is formed, which enters the magnetic separator for further cleaning. A rational ratio of wastewater: magnetic fluid (WW:MF), WW:MF = 8,7‧10-3: 1 was found. A comparison of the data obtained using informative methods with the data given in the regulatory documents witness the effectiveness of the proposed combined method of beer wastewater treatment in relation to the norms of water discharge into the city sewer, namely, the hydrogen pH indicator decreases as a result of the treatment by 34.6%, COD by 7.14 times, BOD5 by 1.52 times, suspended substances by 1.52 times, calcium cations Ca2+ by 1.53 times, magnesium cations Mg2+ by 1.51 times, total hardness dH by 1.64 times, carbonate hardness KH by 1, 86 times.