Dry mesophilic fermentation of chicken manure for production of methane by repeated batch culture

Improved anaerobic digestion performance and biogas production from poultry litter after lowering its nitrogen content

“…The general trend was increasing TA concentration as TS loads increased. Such high TA concentrations are typically reported by works dealing with anaerobic digestion of PL (Abouelenien et al, 2009b;Bujoczek et al, 2000). In contrast, in the series with TPL after ammonia stripping, TA concentrations were much lower than 2.5-3 g/L.…”

“…To achieve this there are various suggested strategies, such as diluting PL (Bujoczek et al, 2000), adjusting C/N ratio of the digester by co-digesting PL with a carbon rich co-substrate(s) (Abouelenien et al, 2014), addition of phosphorite ore (Krylova et al, 1997), removing ammonia by biogas recycle (Abouelenien et al, 2010) and using multiple ammonia stripping phases during drydigestion of PL (Abouelenien et al, 2009b).…”

“…To enhance the FA species, the pH of the substrate should be very high (>10) or/and temperature should be raised (Abouelenien et al, 2009b). As can be seen in Fig.…”

“…In order to remove nitrogen from PL by ammonia stripping, proteins or uric acid should be first degraded down to ammonia. For this reason, PL could be stored under dry anaerobic conditions for protein and uric acid degradation to convert organic nitrogen to ammonia (Abouelenien et al, 2009b;Kirchmann and Witter, 1989), followed by ammonia stripping to reduce the nitrogen content. Reducing the nitrogen content it is hypothesized that the anaerobic digestion of PL would be enhanced.…”

Sustainable Agro-Food Industrial Wastewater Treatment Using High Rate Anaerobic Process

“…Zhao et al [10] concluded that adsorption was the main removal mechanism for the three F-substituent aromatics, such as 4-fluorophenol (p-FP), 4-fluorobenzoic acid (p-FB) and 4-fluoroaniline (p-FA). To overcome ammonia toxicity, many strategies have been suggested: chemical precipitation, pH and temperature control [78]; use of carbon fiber textiles [81]; acclimation of methanogenic consortia to high ammonia levels [82]; and ammonia stripping and adjustment of the C:N ratio of feedstock [83]. Uludag-Demirer et al [84] and Wang et al [49] described the physical, chemical and biological methods, such as addition of ammonium-selective adsorbent, ammonium removal by forming struvite precipitation or a biological anoxic/oxic (A/O) process.…”