Technological Parameters of Rotating Electrochemical and Electrobiological Disk Contactors Depending on the Effluent Quality Requirements

Soilless tomato cultivation wastewater, with typically low COD, high concentrations of phosphorus, and oxidized forms nitrogen, may be effectively treated in a rotating electrochemical disk contactor (RECDC) bioelectrochemical reactor (BER), such as electrobiological (REBDC). The aim this study was to determine the technological parameters both reactors, i.e., electric current density (J) hydraulic retention time (HRT), depending on effluent quality requirements. conducted four one-stage RECDCs REBDCs, at times, 4, 8, 12, 24 h, densities 0.63, 1.25, 2.50, 5.00, 10.00 A/m2. It demonstrated that soilless wastewater could contactors, then discharged sewage system facilities. In RECDC, highest denitrification (53.4%) dephosphatation (99.8%) performance achieved J = 10.0 A/m2 HRT h. If effluents are natural reservoirs, their effective treatment is only feasible REBDC. ensured over 90% effectiveness. At h all studied, pollutants met requirements set for industrial into waters ground. By applying 2.5 REBDC, it possible achieve phosphorus concentration below 3.0 mg P/L ammonia nitrogen nitrites lower than permissible levels introduced Given nitrate (exceeding 30 N/L), an external carbon source recommended aid process uses Technological schemes were proposed plants (WWTPs) RECDC discharging waters, ground, systems.