Thermo- and mesophilic aerobic batch biodegradation of high-strength distillery wastewater (potato stillage) – Utilisation of main carbon sources

Continuous Biodegradation of Sugar Beet Distillery Stillage in an Aerobic Stirred-Tank Reactor: The Effect of Hydraulic Retention Time

“…Biodegradation of this stillage conducted in the batch system under the same conditions, comparable HRT and the same bacterial culture as in our study resulted in very similar reductions of COD, BOD 5 and TOC, accounting for 80%, 98% and 76%, respectively, and in a similar value of the COD removal rate reaching 0.4 g O 2 /(L h) [2]. Efficiency of the continuous process approximated efficiencies of other analogous batch processes of biodegradation of such distillery wastewaters like: sugar beet molasses vinasse [16,26], corn stillage [32] and potato stillage [33]. The maximal COD reduction reported by these authors ranged from 74% (corn stillage) to 89% (potato stillage).…”

“…Its synthesis was also observed during biodegradation of this stillage in batch processes [2], likewise, during continuous degradation processes of starch stillage from waste products and during batch processes of degradation of beet molasses vinasse [26]. It needs to be added that under certain process conditions, the Bacillus genus bacteria are also capable of synthesizing (in significant amounts) acetic, lactic, propionic, valeric, and formic acids [33]. As pinpointed by these authors, biosynthesis of organic acids usually intensifies at the stage of enhanced bacterial activity -namely at low dissolved oxygen tension in the medium.…”

Betaine removal during thermo- and mesophilic aerobic batch biodegradation of beet molasses vinasse: Influence of temperature and pH on the progress and efficiency of the process

“…The efficiency of removal achieved for glycerol is comparable to that reported in the paper on the biodegradation of potato slops (Krzywonos et al, 2009), where the extent of reduction in glycerol concentration varied from 90.2% to 95.9%. However, the reducing substances determined after hydrolysis were removed with an efficiency that was notably lower than in the experiments with the potato slops already mentioned (88.4e95.8%).…”

“…The removal of the sum of organic acids varied from 88.35% to 94.72%, whereas the reduction in the content of a The value of this parameter was calculated for the point in time after which 90% of the overall reduction in SCOD sum was attained. b Values following the sign "AE" denote standard deviation, n ¼ 3. c,d,e Differences in the values denoted by the same letter in the same row are statistically insignificant for p 0.05. organic acids during the biodegradation of potato slops was higher and varied from 91.7% to 99.63% (Krzywonos et al, 2009).…”

Water and energy saving bioprocess for bioethanol production from corn grain applying stillage liquid part recirculation

“…Increase in the demand for ethanol as a fuel additive resulted in an increase in the amount of corn used for ethanol production. There are many technologies and materials applied for effective bioethanol production and stillage utilization (Mwithiga, 2013;Anwar et al, 2012;Marx et al, 2012;Shanavas et al 2011;Mojovic et al, 2010;Sun et al, 2010;Gibreel et al, 2009;Krzywonos et al, 2009a;Nicolic et al, 2009;Cibis et al, 2006a). Corn is characterized by high crop (8.0 t ha ) from ha.…”