Table 2 Levels of methane production and microbial cell density after the cultivation of the formation waters with methanogenic substrates

From: Physicochemical impacts associated with natural gas development on methanogenesis in deep sand aquifers

 

Methane production a

Number of cells (ml−1)b

 

H 2 /CO 2

Ace

Meth/TMA

H 2 /CO 2

AOY1

++++

  

1.4E+07

AOY2

    

AOY3

    

BHC1

    

BOM3

    

BOM6

+++

 

+

3.3E+07

BRS1

++++

   

GOT1

++++

 

+

2.2E+07

GOT2

    

GOT3

++++

   

GOT4

    

GOT5

++++

   

HBS1

++++

   

HBS2

++++

   

HKN1

++++

   

HSY1

++++

 

++

3.9E+07

KDO1

++++

   

KNS1

++++

   

MCI1

++++

 

+

5.6E+07

MCI2

++++

++++

+++

 

MOB4

    

MOB7

++++

  

7.9E+06

NTK1

+++

   

SRT1

++++

 

++

8.6E+06

  1. Abbreviations; Ace, acetate; Meth, methanol, TMA, trimethylamine.
  2. aThe number of+indicates the percentage of maximum theoretical yield of methane. ++++, >75%; +++ >50%; ++, >25%; +, >0%.
  3. bThe number of cells were counted only in the H2/CO2 amended cultures that were also subjected to the clone library analysis.
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