Degradation of phenol by underwater pulsed corona discharge in combination with TiO2 photocatalysis

Preliminary Study on Treatment of Palm Oil Mill Effluent (POME) by Sand Filtration-DBD Plasma System

“…The results indicate that the removal efficiency of COD, BOD 5 and oil-grease increased with applied voltage. The electrical energy consumption needed is about 10.56 kWh/L of POME.…”

“…Three series of batch experiments were performed to investigate the removal efficiency of COD, BOD 5 , and oil-grease, as shown in Table 2. In the first series, sand filtration (Run 1) was examined.…”

“…Figure 3 shows voltage variations to generate discharge current into the plasma reactor. The COD, BOD 5 , and oil-grease were analyzed following the American Public Health Association standard methods for the examination of water and wastewater [10]. Additionally, pH and temperature were analyzed, using a Milwaukee MI 180 laboratory bench meter.…”

“…It can be seen that the removal efficiency of COD, BOD 5 , and oil-grease was at 37, 36, and 27% respectively after treatment with sand filtration. For the treatment with DBD (Series 2), the removal efficiency of COD, BOD 5 , and oilgrease was 33, 32, and 23% respectively, after applying a voltage of 19 kV for 2 hours. Sato [12] reported that the discharge current on the water surface produces many active species that effectively decompose the organic compounds.…”

“…A dielectric barrier discharge (DBD) system is generated by electrical discharges in a liquid in order to produce oxidizing species radicals (H• and •OH) and molecules (H 2 O 2 , O 3 , etc.) [5]. These chemical reactants are effective in degrading organic pollutants.…”