MBR and Sludge glossary (N)
N removal
Nitrogen removal
NADH
Nictotinamide adenine dinucleotide hydrogenase
nbVSS
Non-biodegradable volatile suspended solids
Neutrally buoyant
Neither floating nor sinking
NF
Nanofiltration
NIPS
Non-solvent induced phase separation
Nitrification
Biochemical conversion of ammonia to nitrate
Nitritation
Biochemical conversion of ammonia to nitrite
NOM
Natural organic matter
Non-oxidative thermochemical methods
Thermochemical methods which exclude oxygen, normally comprising pyrolysis, gasification and hydrothermal methods
NPV
Net present value
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