As part of the work, studies of the quality of wastewater from alcohol production were carried out; the main characteristics were determined, such as the charge of dispersed particles and the content of organic compounds and fats. A comparison is made of the effectiveness of titanium salts, traditional aluminum, and iron-containing coagulants. It has been established that titanium salts are much more effective than traditional reagents, but their high cost significantly limits the scope of their application. The possibility of increasing the efficiency of traditional coagulants by adding various titanium salts in an amount of up to 10% of the mass has been proved. It has been established that the addition of titanium compounds to aluminum or iron-containing coagulants makes it possible to increase the cleaning efficiency by an average of 10–20% while a significant reduction in the dose of reagents is possible, which will have a positive effect on the cost of the cleaning process. It was found that the addition of titanium salts to a coagulant based on aluminum sulfate allows not only an increase in the cleaning efficiency but also further intensifies the processes of sedimentation and filtration of coagulation sludge, which will significantly reduce the size of the treatment equipment and reduce capital costs.

At present, one of the most complicated processes is wastewater treatment in the electroplating industry due to a broad range of substances with various properties. Many of them are hazardous toxic substances. Therefore, current treatment processes represent multi-stage process operations. This paper presents an option of treating wastes from the chrome plating area. The authors consider the possibility of using composite coagulants-reducers (CCR) produced by using titanium tetrachloride, a non-standard raw material. Titanium compounds positively influence treatment efficiency, expand an operating range of рН, the settling rate and sludge filtration. At the first stage of studies CCR was produced and tested on a test solution. Residual concentration of chromium (VI) compounds shows the potential for using CCR. During the experiment the authors also studied how impurities of heavy metals and the salt composition of water influenced efficiency of removing chromium (VI) compounds. It was shown that background concentrations of metals and high content of salts had almost no influence on treatment performance, when using titanium (III) chloride and CCR. At the final stage we tested efficiency of actual waste treatment using CCR. The experiment confirmed that titanium compounds added to conventional coagulants significantly increased the settling rate and sludge filtration. This contributes to easier implementation of the process in general.