혐기소화액의 pH 조절이 액비화 과정 및 종자 발아에 미치는 영향 = Effect of pH adjustment on the liquefaction process of anaerobic digestate and seed germination

다국어 초록 (Multilingual Abstract)

This study aimed to survey the chemical change and germination effect of anaerobic digestate after pH adjustment and aerobic treatment. The amount of ammonia (NH3) in swine slurry anaerobic digestates (SS AD) of pH 7.0 and pH 6.5 were lower than that of un-adjusted anaerobic digestate. Especially, the anaerobic digestate with pH 6.5 had the lowest NH3 generation. The amount of NH4-N has been gradually decreasing in the untreated anaerobic digestate, however, the anaerobic digestates with pH 7.0 and pH 6.5 showed no significant changes. In the germination tests with different methods, the germination index (GI) of anaerobic digestates with pH 7.0 and pH 6.5 was higher than that of un-adjusted anaerobic digestate. Thus, the pH adjustment will be useful to decrease the gas generation such as NH3, which causes the odor generated from anaerobic digestate.