Abstract:
:External stress factors in the form of ionic species or temperature increases have been shown to produce a stress response leading to enhanced PHA production. The effect of five different NaCl concentrations, namely 3.5, 6.5, 9, 12 and 15 g/l NaCl on PHA productivity using Cupriavidus necator has been investigated alongside a control (no added NaCl). A dielectric spectroscopy probe was used to measure PHA accumulation online in conjunction with the chemical offline analysis of PHA. The highest PHA production was obtained with the addition of 9 g/l NaCl, which yielded 30% higher PHA than the control. Increasing the addition of NaCl to 15 g/l was found to inhibit the production of PHA. NaCl addition can therefore be used as a simple, low cost, sustainable, non toxic and non reactive external stress strategy for increasing PHA productivity.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Passanha P,Kedia G,Dinsdale RM,Guwy AJ,Esteves SRdoi
10.1016/j.biortech.2014.04.068subject
Has Abstractpub_date
2014-07-01 00:00:00pages
287-94eissn
0960-8524issn
1873-2976pii
S0960-8524(14)00608-7journal_volume
163pub_type
杂志文章abstract::The effects of changes in cellular characteristics and dissolved organic matter (DOM) on dissolved air flotation (DAF) harvesting of Chlorella zofingiensis at the different growth phases were studied. Harvesting efficiency increased with Al(3+) dosage and reached more than 90%, regardless of growth phases. In the abse...
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