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Table 3 Parameters characterizing the MMC selection and PHA accumulation processes with the three OFMSW-supernatants

From: Enhanced polyhydroxyalkanoate (PHA) production from the organic fraction of municipal solid waste by using mixed microbial culture

Substrate PHA contenta (g kg−1 VSS) Polymer composition (ΔHB/ΔHV) (% w/w) PHA yieldc (mg mg−1 CODcons.) PHA yieldd (mg mg−1 CODOA-cons.) PHA yielde (g kg−1 CODin) PHA yieldf (g kg−1 OAin) PHA productivity (g L−1 day−1) X growth yieldg (mg mg−1 CODcons.)
Selection
OFMSW-supernatantin 1 342 ± 23 0.51 ± 0.02 0.85 ± 0.26 0.16 ± 0.01
OFMSW-supernatantin 2 383 ± 2 0.54 ± 0.07 0.87 ± 0.09 0.05 ± 0.01
OFMSW-supernatantin 3 234 ± 20 0.42 ± 0.04 1.15 ± 0.34 0.09 ± 0.01
Accumulation
OFMSW-supernatantacc. 1 476 ± 41b 56.5 ± 3.5/43.5 ± 3.5 0.44 ± 0.17 1.13 ± 0.18 134 ± 22 230 ± 38 4.4 ± 1.3
OFMSW-supernatantacc. 2 465 ± 21b 54.5 ± 2.6/45.5 ± 2.6 0.52 ± 0.1 0.75 ± 0.21 128 ± 16 220 ± 28 4.3 ± 1.2
OFMSW-supernatantacc. 3 405 ± 28b 57 ± 2/43 ± 2 0.5 ± 0.1 0.66 ± 0.09 94 ± 5 161 ± 9 7 ± 0.9
  1. aPHA stored at the end of the feast phase referred to VSS
  2. bPHA accumulated at the end of the accumulation test referred to VSS
  3. cPHA storage yield expressed as COD (CODPHA) referred to CODcons.
  4. dPHA storage yield expressed as COD (CODPHA) referred to CODOA-cons.
  5. ePHA produced referred to CODin
  6. fPHA produced referred to OAin
  7. gX growth yield during feast phase expressed as COD (CODX) referred to CODcons.