Performance evaluation of a novel anaerobic digestion operation process for treating high-solids content chicken manure: Effect of reduction of the hydraulic retention time at a constant organic loading rate
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081 (China)
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Beijing 100085 (China)
- Department of Biochemical Conversion, Deutsches Biomasseforschungszentrum gemeinnützige GmbH (DBFZ), Leipzig 04347 (Germany)
- College of Engineering (Biomass Engineering Center), China Agricultural University, Beijing 100083 (China)
Highlights: • A novel feeding strategy, keeping constant OLR but reducing HRT{sub CM} was adopted. • The effect of reducing HRT{sub CM} on CH{sub 4} fermentation of chicken manure was studied. •High content of ammonia was the main inhibition factor at HRT{sub CM} of 52 days. • Reduce in HRT{sub CM} relaxed the inhibition of high ammonia at OLR of 6.0 gVS/L/d. • The performance deterioration occurred as HRT{sub CM} decreased to 10 days. - Abstract: A novel feeding strategy was adopted in this study and the effect of reduction in hydraulic retention time (HRT) on the anaerobic digestion of chicken manure (CM) with a constant organic loading rate of 6.0 gVS/L/d was investigated. The lab-scale CSTR was operated at 38 °C and HRT{sub CM} was reduced from 52 days to 5 days. At HRT{sub CM} of 20–45 days, the reactor was relatively stable in terms of the volumetric biogas production rates and specific biogas production (SBP), which were 2.2–2.4 L/L/d and 338.3–418.7 mL/gVS{sub added}, respectively. However, process instability and VFA accumulation occurred when the HRT{sub CM} was reduced to 10 days due to excess microbes washout. The reduction in HRT{sub CM} to 5 days caused SBP to decrease to 198.7 mL/gVS{sub added} and the acetic acid content to exceed 6000 mg/L. The biomass balance model showed that the biomass concentration at HRT{sub CM} of 20–52 days (0.473–0.615 gVSS/L) was notably higher than that at HRT{sub CM} of 5–10 days (0.173 gVSS/L).
- OSTI ID:
- 22742097
- Journal Information:
- Waste Management, Vol. 64; Other Information: Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0956-053X
- Country of Publication:
- United States
- Language:
- English
Similar Records
Co-digestion of cattle manure with food waste and sludge to increase biogas production
Effects of a gradually increased load of fish waste silage in co-digestion with cow manure on methane production