Solepur: A Soil Treatment Process for Pig Slurry with Subsequent Denitrification of Drainage Water
✍ Scribed by J. Martinez
- Publisher
- Elsevier Science
- Year
- 1997
- Tongue
- English
- Weight
- 319 KB
- Volume
- 66
- Category
- Article
- ISSN
- 0021-8634
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✦ Synopsis
The soil purification capacity for treating pig slurry was evaluated over five years using a hydrologically isolated field treatment plant , the so-called ''Solepur'' process . This involves three operations : (1) overdosing the managed field with surplus slurry , (2) collecting and treating the nitrate rich leachate , (3) irrigating the final treated water over other fields . The facility consists of (1) a managed field (3280 m 2 ) which allows the total recovery of all the leachate water which percolates through growing ryegrass , Lolium perenne , to which the pig slurry is applied , (2) a storage-pumpreactor system for denitrification and (3) a nonmanaged field for completing treatment .
The purpose of this study was to evaluate over a five year monitoring period , the feasibility and performances of such a process , and to determine the optimum operating conditions . From 1991 to 1995 , 4931 m 3 / ha of raw pig slurry was applied to the managed field , which represents a nominal load of 986 m 3 ha Ϫ 1 yr Ϫ 1 . This process decreased the COD of Conventional methods such as anaerobic digestion and aerobic treatment can be used to reduce of fensive odours from pig slurry and to remove nitrogen and 51