Seasonal changes of waste activated sludge methane potential and its susceptibility to mid-temperature alkaline disintegration
[ 1 ] Instytut Inżynierii Środowiska i Instalacji Budowlanych, Wydział Inżynierii Środowiska i Energetyki, Politechnika Poznańska | [ P ] pracownik
2023
abstrakt
angielski
- alkaline pre-treatment
- extracellular polymeric substances
- methane potential
- waste activated sludge disintegration
EN The aim of this work was to investigate the effect of mid-temperature alkaline pre-treatment with NaOH on wasted activated sludge (WAS) disintegration and methane yield (YCH4) increase. The use of small dose of 16 g NaOH/kg TS and 30 minutes of heating at 60oC allowed to obtain the average degree of sludge disintegration of 29% and YCH4 increase of 30%. The obtained results varied significantly during the year. The highest YCH4 increases (71%) was achieved in summer when the raw WAS YCH4 was the lowest. Changes in WAS YCH4 were correlated to its composition, which was noticed in extracellular polymeric substances (EPS) formation.
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