DOI 10.35776/VST.2022.05.04
UDC 628.345

Stepanov S. V., Avdeenkov Pavel, Ponomarenko Ol’ga, MOROZOVA K. M.

The results of studies of physical and chemical wastewater treatment of an egg processing enterprise


The composition of wastewater of an enterprise for advanced processing of chicken eggs characterized by the following parameters: COD 3,600–12,200mg/l, concentration of suspended solids 1,206–3,031 mg/l, BODtotal 2,534–8,540 mg/l, no phosphates, pH 5.4– 13.2 was studied. The concentration of nitrogen compounds, mg/l, varied within the following ranges: ammonium – 0.4–11.4; nitrates – 0–15.3; nitrites – 0–7.3; organic nitrogen – 26.6–89.7. Based on the results of test coagulation, the optimal coagulant chosen was low-basic polyaluminum chloride brand «Aqua-AuratTM-14» with a dose of 125 mg/l as Al2O3. The average treatment efficiency while using this coagulant was, %: for COD – 77.3; for BODtotal – 76.3; for suspended solids – 80.1; for organic nitrogen – 58.7. The lowest concentration of residual aluminum 0.31 mg/l at the initial concentration of 0.29 mg/l corresponded to pH 6.7–7. Unit costs for the coagulant amounted to 9.37 rubles/m3.

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