Abstract:
:The organic fraction of municipal solid waste (OFMSW) is an abundant and sustainable substrate for the anaerobic digestion (AD) process, yet ammonia released during OFMSW hydrolysis could result in suboptimal biogas production. Acclimatized ammonia tolerant microorganisms offer an efficient way to alleviate ammonia inhibition during AD. This study aimed to achieve an efficient AD of OFMSW under extreme ammonia levels and elucidate the dynamics of the acclimatized microbial community. Thus, two mesophilic continuous stirred tank reactors (CSTR), fed only with OFMSW, were successfully acclimatized up to 8.5 g NH4+-N/L, and their methane yields fluctuated <10%, compared to the methane yields without ammonia addition. Microbiological analyses showed that Methanosaeta concilii and Methanosarcina soligelidi were the dominant methanogens at low and high ammonia levels, respectively. Whilst, a unique metabolic pathway shift, from aceticlastic to hydrogenotrophic methanogenesis, of M. soligelidi was identified during the acclimatization process.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Yan M,Fotidis IA,Tian H,Khoshnevisan B,Treu L,Tsapekos P,Angelidaki Idoi
10.1016/j.biortech.2019.121376subject
Has Abstractpub_date
2019-08-01 00:00:00pages
121376eissn
0960-8524issn
1873-2976pii
S0960-8524(19)30606-6journal_volume
286pub_type
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