کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
681400 | 1460023 | 2012 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Mixed-culture polyhydroxyalkanoate production from olive oil mill pomace Mixed-culture polyhydroxyalkanoate production from olive oil mill pomace](/preview/png/681400.png)
Polyhydroxyalkanoate (PHA) was produced in bench-scale sequencing batch reactors (SBRs) fed olive pomace fermentate containing a mixed microbial consortium. Initial anaerobic fermentation in a sequencing batch fermentor (SBF) produced soluble carbon compounds, mainly organic acids. SBF effluent was centrifuged, removing solids, and fed into a SBR where intracellular PHA was produced. Buffer pre-treatment of diluted olive pomace increased organic acid production 75% in SBF fermentate over no pre-treatment. Hydraulic retention time (HRT), solids retention time (SRT), pomace concentration/dilution, and aerobic operation vs. anoxic/oxic cycling were studied to improve PHA formation. Maximum %PHA achieved was 39% (on a dry-weight cell basis), and the highest volumetric productivity was 0.042 g PHA/L-day under fully aerobic conditions. The highest PHA conversion yield was 0.3625 g PHA/L fermentate.
► PHA was produced in non-sterile conditions using olive pomace as the only feedstock.
► Buffer addition to olive pomace increased organic acid production by 75%.
► Highest volumetric productivity was 0.042 g PHA/L-day.
► Highest PHA conversion yield 0.3625 g PHA/L fermentate.
► Maximum %PHA was 39% (on a dry weight cell basis).
Journal: Bioresource Technology - Volume 120, September 2012, Pages 285–289