The new ABS composting process : application to the pilot unit of stan at Castelnaudary (France)

摘要

This paper describes the industrial pilot unit of Castelnaudary, built in 1997, and gives the main characteristics of the ABS composting process that was developped by the SITA group through the EUREKA VALORBIO programm and with financial assistance of ADEME. The structure of the pilot unit and the three different phases of processing (initial mixing, fermentation, refining) are described. The technical ratios of the process: minimal dry matter content of input products, minimal batch quantity treated per solt, mixing ratio with bulking agents, temperature evolution and monitoring etc... are given. Results of the scientific monitoring on urban sludge and pig-manure sludge are briefly shown. The agronomical, environmental and sanitary qualities of the refined composts are given and compared to those of the input products. The different liquid and gazeous (before and after biofiltration) fluxes produced by the pilot plant have been studied.