Comprehensive monitoring of a biogas process during pulse loads with ammonia |
| |
| Affiliation: | 1. Xergi A/S, Process Research, Burrehøjvej 43, DK-8830 Tjele, Denmark;2. Department of Biosystems Engineering, Faculty of Agricultural Sciences, Aarhus Univ., Blichers Allé 20, DK-8830 Tjele, Denmark;3. Danish Technological Institute, Center of Chemistry and Biotechnology, Kongsvang Allé 29, DK-8000 Aarhus, Denmark;1. Department of Research & Development and External Relations, Hochiminh City University of Natural Resources and Environment, 236B Le Van Sy, Ward 1, Tan Binh District, Hochiminh City, Viet Nam;2. Department of International Development Engineering, Tokyo Institute of Technology, 2-12-1, Ookayama, Meguro-Ku, Tokyo 152-8550, Japan;3. Department of Chemical Engineering, University of the Philippines, Diliman, 1101 Quezon City, Philippines;1. College of Engineering, Nanjing Agricultural University, Nanjing, Jiangsu 210031, China;2. Department of Food Engineering, University of Agriculture, Faisalabad 38000, Pakistan;3. College of Resource and Environmental Science, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China;4. Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Science, Nanjing, Jiangsu 210014, China;5. Institute of Animal Science, Jiangsu Academy of Agricultural Science, Nanjing, Jiangsu 210014, China |
| |
| Abstract: | A thermophilic pilot scale anaerobic digester treating chicken litter was subjected to pulse loads of ammonia of increasing concentration. A micro gas chromatograph (μ-GC) measured CO2, CH4, N2, H2 and H2S in the biogas. In the liquid, NH4-N was measured manually, volatile fatty acids (VFA) were measured manually and with Near Infrared Spectroscopy (NIRS). Within the first 7–24 h after the pulse, the concentrations of iso-butyric and iso-valeric acid increased rapidly and were the best indicators of process stress due to ammonia pulses, confirmed by multivariate analysis. NIRS was not capable of accurate prediction of VFA iso-forms most likely due to low concentrations. Propionic acid was persistent. The ammonia pulses caused an overall decrease of biogas production. The biogas composition was not a good indicator of imbalances; little correlation with VFA measurements was observed. |
| |
| Keywords: | Biogas monitoring Anaerobic digestion Imbalance Ammonia Chemometrics |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
