Earth & Environmental Sciences
water hyacinth
96%
bioenergy production
95%
invasive species
74%
pig
71%
manure
68%
farm
60%
biogas
55%
integrated approach
28%
fermentation
25%
engineering
18%
lignin
15%
meat
14%
sustainable development
11%
experimental study
11%
economy
11%
heating
10%
substrate
9%
demand
9%
winter
8%
lake
8%
project
7%
river
6%
energy
6%
material
5%
water
4%
analysis
3%
Agriculture & Biology
Eichhornia crassipes
89%
bioenergy
78%
invasive species
71%
animal manures
67%
case studies
60%
biogas
51%
farms
47%
swine
45%
China
45%
pig manure
27%
engineering
21%
fermentation
16%
sustainable development
13%
lignin content
12%
carbon nitrogen ratio
12%
feedstocks
10%
farming systems
9%
lakes
9%
rivers
9%
meat
9%
winter
7%
energy
7%
heat
6%
water
4%
Engineering & Materials Science
Manures
100%
Farms
69%
Animals
68%
Biogas
54%
Water
38%
Fermentation
26%
Meats
16%
Lignin
14%
Lakes
13%
Feedstocks
11%
Rivers
11%
Sustainable development
10%
Heating
8%
Substrates
8%