Population dynamics of methanogens and methane formation associated with different loading rates of organic acids along with ammonia: redundancy analysis

Kim, W., Shin, S. G., Cho, K., Han, G. and Hwang, S. (2014) Population dynamics of methanogens and methane formation associated with different loading rates of organic acids along with ammonia: redundancy analysis. Bioprocess and Biosystems Engineering, 37(5), pp. 977-981. (doi: 10.1007/s00449-013-1061-9)

Abstract

In anaerobic processes, the population dynamics of methanogens in the methanogenic stage were monitored along with hydraulic retention times (HRTs) shift. Decreasing HRTs increased the loading rates of volatile fatty acids (VFAs) and ammonia. Methanomicrobiales (MMB) began to be dominant at longer than 12.5 days HRT, Methanosarcinales (MSL) were dominant at 8, 10, and 12.5 days HRT, and Methanobacteriales (MBT) were dominant at shorter than 6 days HRT. Increased loading rates of VFAs and ammonia increased MBT, decreased MMB, and had no significant effect on MSL. Maximal daily methane production was observed at 1.57 L/L when MSL copy numbers also reached 3.60 × 107 copy/mL as a peak, which were expressed as positive correlation between DMA and MSL. No sooner had methane yield (MY) increased from 1.15 to 1.32 L/g VSremoved along with HRT reduction from 25 to 22.5 days, then MY gradually decreased from 1.32 to 0.04 L/g VSremoved.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Shin, Dr Seung Gu
• Authors: Kim, W., Shin, S. G., Cho, K., Han, G., and Hwang, S.
• College/School: College of Science and Engineering > School of Engineering > Infrastructure and Environment
• Journal Name: Bioprocess and Biosystems Engineering
• Publisher: Springer Berlin Heidelberg
• ISSN: 1615-7591
• ISSN (Online): 1615-7605