Integrated biogas technology in the tropics. 2. Use of slurry for fish culture |
| |
| Institution: | 1. IIIEE, International Institute for Industrial Environmental Economics, Lund University, Lund, Sweden;2. Department of Management and Engineering, Division of Energy Systems, Linköping University, Linköping, Sweden;3. Department of Building, Energy and Environment Engineering, University of Gävle, Gävle, Sweden;1. School of Engineering and Materials Science, Queen Mary University of London, London, UK;2. Karlsruhe Institute of Technology, Institute of Catalysis Research and Technology, Karlsruhe, Germany;3. Institute of Agricultural Engineering, University of Hohenheim, Stuttgart, Germany |
| |
| Abstract: | The composite slurry from four 3.5-m3 ferrocement digesters fed a mixture of nightsoil, water hyacinth (Eichhornia crassipes) and rice straw was loaded into four 200-m2 earth fish ponds at organic loading rates of 25, 50, and 100 kg chemical oxygen demand (COD) ha−1 day−1. Impressive extrapolated net fish yields of about 10 kg ha−1 day−1 (3.7 ton ha−1 year−1) were obtained at the highest organic loading rate, equivalent to loading rates of about 120 kg total solids and 4.5 kg total Kjeldahl nitrogen ha−1 day−1. There may be potential for even greater yields from biogas slurry fed fish ponds because the relationship between net fish yield and slurry loading rate was linear. Constraints in the development of integrated biogas technology for poor farmers in the tropics are likely to be associated with the digester rather than with the reuse of slurry for fish culture. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
