바이오매스 공정폐수의 전기화학적 처리에 의한 이화학적 변화
Electrochemical Treatment of Wastewater from Biomass Gasification Process
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This study investigates the feasibility and efficiency of electrochemical treatment for condensate or wastewater generated during the operation of biomass gasification systems. The condensate, produced as synthesis gas cools after high-temperature partial oxidation of biomass, contains high concentrations of organic acids such as acetate, formic acid, phenolic compounds, and polycyclic hydrocarbons, making it difficult to treat using conventional biological processes. The raw condensate in this study exhibited a COD (Chemical Oxygen Demand) exceeding 40,000 mg/L and an acidic pH of 3.2. Overall, this study confirms that electrochemical treatment is a viable and effective method for degrading both organic acids and toxic phenolic compounds present in biomass gasification wastewater. The combination of NaCl electrolyte and BDD (Boron Doped Diamon) electrodes provided the best results. Unlike previous studies that required alkaline pre-treatment, this study demonstrated effective treatment without altering the natural acidic character of the condensate. Future work should focus on optimizing treatment conditions such as current density and electrode area versus volume ratio, and addressing microbubble related operational challenges to enable direct treatment of undiluted wastewater.
Abstract
This study investigates the feasibility and efficiency of electrochemical treatment for condensate or wastewater generated during the operation of biomass gasification systems. The condensate, produced as synthesis gas cools after high-temperature partial oxidation of biomass, contains high concentrations of organic acids such as acetate, formic acid, phenolic compounds, and polycyclic hydrocarbons, making it difficult to treat using conventional biological processes. The raw condensate in this study exhibited a COD (Chemical Oxygen Demand) exceeding 40,000 mg/L and an acidic pH of 3.2. Overall, this study confirms that electrochemical treatment is a viable and effective method for degrading both organic acids and toxic phenolic compounds present in biomass gasification wastewater. The combination of NaCl electrolyte and BDD (Boron Doped Diamon) electrodes provided the best results. Unlike previous studies that required alkaline pre-treatment, this study demonstrated effective treatment without altering the natural acidic character of the condensate. Future work should focus on optimizing treatment conditions such as current density and electrode area versus volume ratio, and addressing microbubble related operational challenges to enable direct treatment of undiluted wastewater.