Earth & Environmental Sciences
catabolism
98%
biofilm
67%
recycling
57%
gas
51%
reactor
51%
energy process
50%
nutrient
48%
waste water treatment plant
47%
methane
46%
methanogenesis
42%
feasibility study
40%
energy storage
33%
suspended culture
30%
gas network
29%
alternative energy
25%
policy framework
23%
integrated management
22%
starvation
22%
oxygenation
21%
rate
21%
energy
20%
carbon monoxide
18%
electrokinesis
17%
wastewater treatment plant
16%
energetics
16%
electricity
16%
carbon dioxide
14%
hydrogen
14%
temperature
13%
attribute
13%
environmental performance
10%
buffering
10%
method
8%
regeneration
8%
material
7%
metal
5%
biotechnology
5%
Engineering & Materials Science
Biofilms
100%
Nutrients
93%
Methanation
81%
Recycling
72%
Water treatment plants
54%
Gases
47%
Microorganisms
44%
Methane
39%
Wastewater
39%
Methanogens
31%
Oxygenation
26%
Conversion efficiency
25%
Energy storage
24%
Renewable energy resources
22%
Wastewater treatment
21%
Electrolysis
21%
Temperature
14%
Electricity
13%
Recovery
12%
Biotechnology
6%
Diffusion in gases
6%
Biogas
6%
Metals
5%
Agriculture & Biology
carbon monoxide
58%
gases
56%
methane
48%
hydrogen
45%
carbon dioxide
38%
methodology
26%
liquids
17%
nutrients
14%
microorganisms
8%
