Definition of optimal conditions for the hydrolysis and acidogenesis of a pharmaceutical microbial biomass

Anaerobic treatment of low-strength wastewater with a high fraction of particulate matter in an unconventional two-phase ASBRs system

“…This situation is more critical in ASBR where settling steps occur in the same tank as the treatment. A similar value of solubilization yield was reported by Penaud et al [23], who studied the optimal conditions for the pharmaceutical microbial biomass treatment in CSTR. As in the present study, a high fraction (over 85%) of the tCOD was particulate.…”

Two‐phase anaerobic digestion processes: a review

“…Penaud et al 10 observed that the bacterial forms exhibited variations with 28 January 2002) respect to the changes in HRT and temperature during acidogenesis of a pharmaceutical waste. Cha and Noike 11 observed long and slender-shaped bacteria at an HRT of 48 h while short and thick stick-shaped bacteria were observed at short HRT and low temperature.…”

“…Mesophilic bacteria were found to be affected adversely by a rise in temperature. Penaud et al 10 and Jarvis et al 13 reported that introduction of a recycling practice to the acidogenic reactor also affected the bacterial population levels and activity. Almost a nine-fold increase in the activity of hydrogenotrophic methanogens was observed by the initiation of liquid recirculation.…”

Anaerobic Pre-treatment of Pharmaceutical Wastewater using Packed Bed Reactor

“…In another word, short contact times between the substrate and biomass could have been favour the activity of acidogens, leading to a low conversion of substrate to methane by the biomass flocs, and substantial amounts of VFAs being washed through the reactor into the effluent. According to previous studies, higher organic loadings and shorter HRTs generally provide the optimum conditions for acid-forming bacteria and greatly affected VFA production [18,19].…”