2002, Volume 36, 2530-2535 Bruce E. Logan,* Sang-Eun Oh, In S. Kim, and Steven Van Ginkel: Biological Hydrogen Production Measured in Batch Anaerobic Respirometers Page 2531. The text below eq 1 did not correctly identify subscripts used in the equation and should read as follows: “where VH,i and VH,i-1 are cumulative hydrogen gas volumes at the current (i) and previous (i - 1) time intervals, respectively; VG,i and VG,i-1 are the total biogas volumes in the current and previous time intervals; CH,i and CH,i-1 are the fraction of hydrogen gas in the headspace of the bottle measured using gas chromatography in the current and next previous intervals; and VH is the total volume of headspace in the reactor (44 mL).” Page 2533. Table 1 contained incorrectly calculated values and should be replaced by the following table:
TABLE 1. Summary of Total Biogas and Hydrogen Gas Production Measured Using Substrates (S)a
substrate (formula)
g of COD (mmol)
biogas (mL)
mL
glucose (C6H12O6) sucrose (C12H22O11) molasses potato starch [(C6H10O5)n] lactate (C3H5O3Na) cellulose [(C6H10O5)n]
1.0 (5.21) 1.0 (2.6) 1.3 (-)b 1.0 (5.21) 1.0 (11.36) 1.0 (5.21)
244 217 233 134 7.2 0.96
125 131 134 90 2.3 0.6
H2 produced mol/mol of S 0.98 2.05 b 0.70 0.008 0.005
maximum H2 production (mol/mol of S)
conversion (%)
4 8 b 4 2 4
24.5 25.6 b 17.6 0.4 0.1
a Substrate conversion efficiencies assume production of acetate as the organic carbon end product in order to calculate the indicated maximum production of H2. b Cannot be calculated.
ES030314X 10.1021/es030314x
10.1021/es030314x CCC: $25.00 Published on Web 01/24/2003
2003 American Chemical Society
VOL. 37, NO. 5, 2003 / ENVIRONMENTAL SCIENCE & TECHNOLOGY
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