TRANSITION OF MESOPHILIC TO THERMOPHILIC DIGESTION OF SEWAGE SLUDGE
2016 (English)In: TRANSITION OF MESOPHILIC TO THERMOPHILIC DIGESTION OF SEWAGE SLUDGE, 2016Conference paper (Refereed)
In this comparative study two types of temperature transition strategies from mesophilic to thermophilic conditions in anaerobic digestion was explored. Both strategies used a rapid increase from 37 to 55°C with a constant organic loading rate (2.4 kg VS m-3 d-1) and hydraulic retention time (14 d). The two digesters used the same mesophilic inoculoum but in the second digester a small share of thermophilic digeastate was also inoculated. A comparative dewaterability study between the fullscale mesophilic digestate and the thermophilic digestates were also performed as part of the study. The results showed a stabilization in both digesters within 14 days (1 Hydraulic retention time). The digester where a small share of thermophilic inoculum was introduced had a higher methane production compared to the control reactor where just mesophilic inoculum was used. The comparative dewaterability study showed a deterioration of the dewaterability in both digesters when thermophilic conditions was established.
Place, publisher, year, edition, pages
Anaerobic digestion, Mesophilic conditions, Thermophilic conditions, Temperature transition, Methane production.
Engineering and Technology
Research subject Energy- and Environmental Engineering
IdentifiersURN: urn:nbn:se:mdh:diva-34261OAI: oai:DiVA.org:mdh-34261DiVA: diva2:1057128
6th International Symposium on Energy from Biowaste and Waste - Venice 14-17 November, 2016