레조르시놀 폐수의 혐기성 소화 시 아세트산 함량이 레조르시놀 분해 및 메탄 생성에 미치는 영향 조사 = Effect of Acetate Concentration on Resorcinol Degradation and Methane Production in Anaerobic Digestion of Resorcinol Wastewater

다국어 초록 (Multilingual Abstract)

Industrial resorcinol wastewater typically contains acetate at appreciable concentrations, potentially affecting its anaerobic digestion performance. Therefore, in this study, we conducted anaerobic batch tests to evaluate the effect of acetate concentration on resorcinol degradation and methane production during the anaerobic digestion of resorcinol wastewater. The anaerobic batch test using resorcinol as the sole substrate achieved 360.7 mL-CH4/g-chemical oxygen demand (COD) within 10 days, demonstrating the applicability of anaerobic digestion for treating resorcinol-containing wastewater. When acetate was introduced as a co-substrate, the methane production rate decreased from 101 mL-CH4/L/d to 64–83 mL-CH4/L/d, approximately 17.8–36.6% lower than that of the control. The resorcinol degradation rate also decreased from 133 mg-COD/L/d to 64-105 mg-COD/L/d, corresponding to a reduction of approximately 21.1-51.9% compared with the control. These results suggest that acetoclastic methanogenesis was the rate-limiting step, limiting the overall anaerobic digestion of resorcinol. This study provides insights into how the composition of resorcinol wastewater (i.e., resorcinol and acetate) affects anaerobic digestion performance and may help inform the optimization of anaerobic treatment strategies for industrial resorcinol wastewater.