In the subsequent biogas production from the stored PS, more CH 4 was obtained by ROC addition due to the preservation of organic matter during storage. The results of the microbial community and activity test showed that sodium directly inhibited methanogenic activity rather than acidogenic activity. This decrease was found to be more intensive than that found upon adding pure sodium, which was caused by the presence of sulfate rich in ROC, resulting in synergistic inhibition. During 40 days of storage, 1.83 kg CH 4/ton PS was emitted, which was reduced by 7–75% by the addition of ROC at 1–9 g Na +/L. ![]() Simultaneously, pure NaCl was tested at the same concentration to compare and verify the performance of ROC addition. In the present study, we added the reverse osmosis concentrate (ROC) rich in salt to the pig slurry (PS) storage tank to reduce CH 4 emissions. The manure storage tank emits a significant amount of CH 4, which can diminish the environmental benefit resulting from the anaerobic digestion of manure that can generate renewable energy. GWP20 = 86), mitigating CH 4 emissions could have an early impact on reducing current global warming effects. 3Department of Civil Engineering, Inha University, Incheon, Republic of Koreaĭue to the high global warming potential (GWP) in a short time scale (GWP100 = 28 vs.2Department of Global Smart City, Sungkyunkwan University (SKKU), Suwon-si, Gyeonggi-do, Republic of Korea. ![]() 1Department of Environmental Research, Korea Institute of Civil Engineering and Building Technology, Goyang-si, Gyeonggi-do, Republic of Korea.Seongwon Im 1, Sungwon Kang 1, Duksoo Jang 2, Gyeongchul Kim 3 and Dong-Hoon Kim 3 *
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