The poultry production sector consumes high amounts of water in its production processes and thus is a sector that causes significant wastewater production. Poultry wastewater contains various and high amounts of organic matter (e.g., proteins, blood and fat). Chemical coagulation and electro-coagulation (EC) techniques have been particularly explored at the laboratory pilot scale in order to produce an effluent suitable for stream discharge for organic compounds removal from its effluent. Among the other electrochemical methods, EC process is the electrochemical production of metal ions (such as Al and Fe) that act as destabilizing agents and leads to neutralization of electric charge for removing pollutants.
The purpose of this work was to investigate the treatability of poultry wastewater by EC process using a model reactor via iron (anode-cathode) electrodes. Removal of nutrients (nitrogen and phosphorus) caused eutrophication was investigated in particular. Effect of the operating time was evaluated in a batch mode in terms of removal efficiencies of phosphorus and nitrogen.
The pH of influent poultry wastewater was in the range 6.19 to 6.25. The pH was monitored for 30 minutes and the pH value has decreased at the effluent wastewaters during process time. The removal efficiency was 99.8% for PO4-P, 27.4% for TKN at the end of the 30 min operating time. In addition, oil-grease removal (99%) has been effectively achieved from poultry wastewater containing high concentration oil-grease (5328 mg/L) in EC process. The rate of removal of the primary nutrients linearly increased with increasing of process time. These results indicate that EC can be used as an effective treatment technique to remove nutrients from poultry wastewater.
Anahtar Kelimeler: poultry wastewater, iron electrode, phosphorus removal, nitrogen removal
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