Enhancing hyper-thermophilic hydrolysis pre-treatment of chicken manure for biogas production by in-situ gas phase ammonia stripping
Articolo
Data di Pubblicazione:
2019
Citazione:
Enhancing hyper-thermophilic hydrolysis pre-treatment of chicken manure for biogas production by in-situ gas phase ammonia stripping / D.M. Yin, W. Qiao, C. Negri, F. Adani, R. Fan, R.J. Dong. - In: BIORESOURCE TECHNOLOGY. - ISSN 0960-8524. - 287(2019), pp. 121470.1-121470.9.
Abstract:
Hydrolysis is normally the rate limiting step for anaerobic digestion (AD). In this study, hyper-thermophilic (70 °C) pre-treatment of chicken manure under HRTs of 10, 5, 3, 2 and 1 d(s) was investigated to enhance the hydrolysis efficiency for biogas production. In-situ phase gas stripping was integrated into the pre-treatment reactor to remove ammonia-N and to enhance the hydrolysis performance. The results showed that in-situ gas stripping removed 18%–31% of ammonia-N and improved hydrolysis by 2.6%–31.1%. The methane yield of pre-hydrolyzed chicken manure reached 518 mL g-VS −1 under optimal HRT 3 days, which was 54.6% higher than that obtained from the control reactor. However, shortening HRTs below 3 days resulted in a significant reduction in hydrolysis efficiency. The percent of hydrolysis and acidogenesis bacteria reduced to 40.6% at HRT 1 d. 16sRNA results indicated existence of methanogens in pre-hydrolysis reactor. Further optimizing of ammonia stripping was thus needed for hydrolysis pre-treatment.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Anaerobic digestion; Chicken manure; Hyper-thermophilic hydrolysis pre-treatment; In-situ ammonia stripping
Elenco autori:
D.M. Yin, W. Qiao, C. Negri, F. Adani, R. Fan, R.J. Dong
Link alla scheda completa: