Subject
waste water treatment
32
biodegradation
13
denitrification
11
water purification
9
bioreactor
8
water pollution
7
activated sludge
5
aquatic microbiology
5
drinking water
5
microbial degradation
5
waste water
5
water pollutant
5
anaerobiont
4
biotechnology
4
immobilized cell
4
microbial activity
4
microbial waste water treatment
4
water pollution control
4
water protection
4
water purification equipment
4
wetland
4
bacterium
3
biological aspect
3
nitrification
3
sensor (biological)
3
water treatment plant
3
Chemistry.
2
Water pollution.
2
ammonia
2
biofilm
2
cell culture
2
degradation
2
fermentation
2
fluidized bed reactor
2
fresh water
2
heavy metal concentration
2
membrane
2
microbiology
2
microorganism
2
plant physiology
2
purification
2
sewage sludge
2
slurry
2
soil pollution
2
water chemistry
2
Alternate energy sources.
1
Analytical chemistry.
1
Biochemical engineering.
1
Biotechnology.
1
Chemical engineering.
1
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