Mesophilic versus thermophilic digestion of sludge in anaerobic membrane bioreactors

Amr Mustafa Abdelrahman*, Saba Aghdam Tabar, Busra Cicekalan, Safak Basa, Gulin Ucas, Huseyin Guven, Hale Ozgun, Izzet Ozturk, Ismail Koyuncu, Jules B. van Lier, Eveline I.P. Volcke, Mustafa Evren Ersahin

*Bu çalışma için yazışmadan sorumlu yazar

Araştırma sonucu: Dergiye katkıMakalebilirkişi

Özet

Energy-efficient wastewater treatment plants (WWTPs) utilize systems like high-rate activated sludge (A-stage) system to redirect organics from wastewater are redirected into energy-rich sludge (A-sludge). Anaerobic membrane bioreactors (AnMBRs) offer lower footprint and higher effluent quality compared to conventional digesters. In this study, the biological treatment and the filtration performances of AnMBRs for A-sludge digestion under mesophilic and thermophilic conditions were comparatively evaluated through lab-scale experiments, mass balancing and dynamic modeling. Under thermophilic conditions, a higher COD fraction of the influent sludge was converted into methane gas than under mesophilic conditions (65% versus 57%). The energy balance indicated that the surplus energy recovery under thermophilic conditions was less than the additional energy required for heating the AnMBR, resulting in a more than three-fold higher net energy recovery under mesophilic conditions. Therefore, operating an AnMBR for sludge digestion under mesophilic conditions has a higher potential to improve the energy balance in WWTPs.

Orijinal dilİngilizce
Makale numarası131822
DergiBioresource Technology
Hacim417
DOI'lar
Yayın durumuYayınlandı - Şub 2025

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© 2024 Elsevier Ltd

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