Skip to main page content
Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
, 208, 200-204

Reorganisation of a Mesophilic Biogas Microbiome as Response to a Stepwise Increase of Ammonium Nitrogen Induced by Poultry Manure Supply

Affiliations

Reorganisation of a Mesophilic Biogas Microbiome as Response to a Stepwise Increase of Ammonium Nitrogen Induced by Poultry Manure Supply

Khulud Alsouleman et al. Bioresour Technol.

Abstract

An anaerobic digestion experiment was investigated to evaluate the impact of increasing amounts of ammonium nitrogen due to poultry manure addition on the reactor performance, especially on the microbiome response. The microbial community structure was assessed by using a 16S rRNA gene approach, which was further correlated with the prevalent environmental conditions by using statistical analyses. The addition of 50% poultry manure led to a process disturbance indicated by a high VFA content (almost 10 g(HAc-Eq) L(-1)) in combination with elevated concentrations of ammonium nitrogen (5.9 g NH4(+)-N kg(FM)(-1)) and free ammonia (0.5 g NH3 kg(FM)(-1)). Simultaneously the microbiome, changed from a Bacteroidetes-dominated to a Clostridiales-dominated community accompanied by a shift from the acetoclastic to the hydrogenotrophic pathway. The "new" microbial community was functional redundant as the overall process rates were similar to the former one. A further increase of poultry manure resulted in a complete process failure.

Keywords: Anaerobic digestion; Disturbance; Microbial community reconstruction; NH(4)(+)-N inhibition; Poultry manure.

Similar articles

See all similar articles

Cited by 3 PubMed Central articles

Publication types

LinkOut - more resources

Feedback