Characterization of methanogenesis, acidogenesis and hydrolysis in thermophilic methane fermentation of chicken manure
메타 데이터
바이오화학분류
바이오정밀화학
화학제품
연료
논문
Characterization of methanogenesis, acidogenesis and hydrolysis in thermophilic methane fermentation of chicken manure
학술지
Chemical engineering journal
저자명
Niu, Q.; Hojo, T.; Qiao, W.; Qiang, H.; Li, Y.Y.
초록
The thermophilic methane fermentation of chicken manure (CM) with a total solids (TS) of approximately 10% was investigated with regard to ammonia inhibition. A gradual increase in total ammonia nitrogen to 6000mg/L was observed in the case of raw CM fermentation. A distinct rise in VFA accumulation combined with a low methane production of 0.29L/gVS occurred at a TAN of 4000~5000mg/L. Biogas production completely ceased when TAN reached 8000mg/L after the addition of NH<SUB>4</SUB>HCO<SUB>3</SUB>. The high sensitivity of methanogenesis to TAN and free ammonia (FA) was quantitatively confirmed. The IC<SUB>50</SUB> of TAN for methanogenesis, acidogenesis and hydrolysis was 5058, 5305 and 5707mg/L at a pH value of 8.1+/-0.2. Similar results but with a lower IC<SUB>50</SUB> were obtained for FA inhibition during fermentation. The microbial community analysis revealed significant differences in hydrogenotrophic methanogens and aceticlastic methanogens before and after inhibition.