1. Jaime Martín-Pascual, University of Granada, Spain
2. Ernesto Hontoria, University of Granada, Spain
3. José M. Poyatos, University of Granada, Spain
The aim of this research was to analyze the effect of time in the digestion of sludge from a methanogenic stage of a two-stage mesophilic anaerobic sludge digestion operating in parallel with a conventional system, to improve the digestion process. The lab plant consisted of two treatment lines that were fed from an acyd digester of a two-stage anaerobic digester with 2.5 days and from a conventional mesophilic anaerobic digester, respectively. The results showed: i) The maximum reduction of volatile obtained in a conventional system, after 27 days, can be achieved in a two stage system, operating at 2.5 days in acid digester and 12 days in the methanogenic; ii) The yields obtained in reduction of volatile in a two stage system can be increased by 7% increasing the time in 5 days in the second stage and therefore a global time of 13 days; iii) A conservative design of the process in two phases of 2.5+12 days to get the same quality of sludge that a conventional system operating at 27 days, thereby reducing the total volume of digestion by 46%.
Ključne reči :
Tematska oblast:
Inženjerstvo u zaštiti okoline
Datum:
29.06.2016.
XI Savjetovanje hemičara, tehnologa i ekologa Republike Srpske
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