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Table 1

Sulfur isotope fractionation factors αS and initial free-swimming biomass B0 of ANME and DSS and consortia CS0 concentrationsa

ProcessInfluent sulfate, mMB0, mMCS0, mMαS
Figure 2      
Influent CH4 = 3.3 mM 7.4    
ANME  2.2  1.035 
DSS  2.2  1.035 
Figure 3      
Influent CH4 = 26 mM 7.0    
ANME  7.5  1.018 
DSS  7.5  1.018 
Figure 4 b     
Influent CH4 = 3.3 mM 7.4  1.5  
ANME  1.2  1.04 
DSS  1.0  1.04 
Figure 5 b     
Influent CH4 = 8 mM 7.0  3.5  
ANME  2.0  1.024 
DSS  1.4  1.024 
Figure 6 b     
Influent CH4 = 14 mM 7.0  7.0  
ANME  2.4  1.023 
DSS  1.8  1.023 
Figure 7 b     
Influent CH4 = 26 mM 6.5  7.5  
ANME  3.0  1.022 
DSS  2.1  1.022 
Figure 8 b     
Influent CH4 = 44 mM 9.0  12.0  
ANME  3.5  1.018 
DSS  2.4  1.018 
ProcessInfluent sulfate, mMB0, mMCS0, mMαS
Figure 2      
Influent CH4 = 3.3 mM 7.4    
ANME  2.2  1.035 
DSS  2.2  1.035 
Figure 3      
Influent CH4 = 26 mM 7.0    
ANME  7.5  1.018 
DSS  7.5  1.018 
Figure 4 b     
Influent CH4 = 3.3 mM 7.4  1.5  
ANME  1.2  1.04 
DSS  1.0  1.04 
Figure 5 b     
Influent CH4 = 8 mM 7.0  3.5  
ANME  2.0  1.024 
DSS  1.4  1.024 
Figure 6 b     
Influent CH4 = 14 mM 7.0  7.0  
ANME  2.4  1.023 
DSS  1.8  1.023 
Figure 7 b     
Influent CH4 = 26 mM 6.5  7.5  
ANME  3.0  1.022 
DSS  2.1  1.022 
Figure 8 b     
Influent CH4 = 44 mM 9.0  12.0  
ANME  3.5  1.018 
DSS  2.4  1.018 

Reversible reactions are not presented. In computer simulations, mol L−1 units were used for concentrations.

aIn the model, in all figures for ANME and DSS the same biomass yield coefficients , the biomass decay coefficients for ANME and DSS and , the half-saturation coefficients , , , , and the maximum specific biomass growth rate and were used. Biomass decay was not taken into account.

bIn Figures 4–8, consortium formation growth and decay coefficients , were used. The value of β = 0.48 was used for consortium.

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